Image Trace: Flat Logo takes the tones of an unevenly lit colour for one colour

A scan's paper is a tenth darker in one corner than in another. Flat Logo found
each tone of it as a colour of its own and traced the bands and the specks
between them: on the scanned inputs 470 paths, 21 px from the art on average.

Two palette colours are now one when the pixels between them are no fewer than
a third of those at the lesser of the two: flat colours leave only their shared
edge between them, tones of one colour fill the gap. Whether the image is flat
art at all is still asked of the tones as found.

Flat Logo on its inputs, all sizes and variants: 3.106 -> 0.090 px off on
average, 88.5 -> 0.82 px at most, 69.9 -> 3.9 paths; clean, aliased, blurred
and noisy art as before.

crates/trace/src/fit.rs

@@ -54,9 +54,13 @@ fn before(a: Point, b: Point) -> std::cmp::Ordering {
 /// Lines within this of level or upright are made exactly so (the tangent of 2.5°).
 const NEARLY_UPRIGHT: f64 = 0.0437;
 
+/// The farthest (px) levelling a line may move either of its ends.
+const LEVEL_REACH: f64 = 1.6;
+
 /// Snap Curves To Lines: the straight pieces of `segs` (a chain; `closed` when its end joins its
 /// start) that are within 2.5° of level or upright and at least 2 px long are made exactly level
-/// or upright, by moving their ends across them: both to their mean, or, in an open chain, the
+/// or upright (unless that moves an end by more than [`LEVEL_REACH`]), by moving their ends
+/// across them: both to their mean, or, in an open chain, the
 /// free end to the end that is fixed (with `fixed_ends`, a chain's own ends stay where they are:
 /// they are junctions other regions share). The pieces next to a moved end follow it.
 fn snap_upright(segs: &mut [Cubic], closed: bool, fixed_ends: bool) {
@@ -96,6 +100,11 @@ fn snap_upright(segs: &mut [Cubic], closed: bool, fixed_ends: bool) {
             (false, true) => pick(b),
             (false, false) => (pick(a) + pick(b)) / 2.0,
         };
+        // Not when an end would go farther than a pixel and a half or so from where the image has it: a long line a
+        // degree or two off is that line, not a level one drawn badly.
+        if (pick(a) - to).abs().max((pick(b) - to).abs()) > LEVEL_REACH {
+            continue;
+        }
         let moved = |p: Point| if level { Point::new(p.x, to) } else { Point::new(to, p.y) };
         if !fixed(ia) {
             put(segs, ia, moved(a));

crates/trace/src/logo/palette.rs

@@ -166,6 +166,61 @@ pub(crate) fn auto_palette(pix: &[Px], w: usize, h: usize, max_colors: usize) ->
     groups.iter().map(|(c, _)| c.map(|v| v.round().clamp(0.0, 255.0) as u8)).collect()
 }
 
+/// How far apart (in RGB) two tones of one colour may be: a scan's paper is a tenth darker in one
+/// corner than in another.
+const TONES_APART: f64 = 60.0;
+
+/// `palette` with the tones of one colour made one colour. Two flat colours leave nothing between
+/// them but the pixels of their shared edges; where a scan's paper is unevenly lit, or a wash
+/// shades off, the pixels between two of its tones are as many as those at either: such a pair is
+/// one colour (their mean, by pixels), however many tones of it were found.
+pub(crate) fn fold_tones(pix: &[Px], mut palette: Vec<[u8; 3]>) -> Vec<[u8; 3]> {
+    let apart = |a: [u8; 3], b: [u8; 3]| dist2(a.map(f64::from), b.map(f64::from)).sqrt();
+    loop {
+        let close: Vec<(usize, usize)> = (0..palette.len())
+            .flat_map(|i| (i + 1..palette.len()).map(move |j| (i, j)))
+            .filter(|&(i, j)| palette.get(i).zip(palette.get(j)).is_some_and(|(a, b)| apart(*a, *b) <= TONES_APART))
+            .collect();
+        if close.is_empty() {
+            return palette;
+        }
+        // Each opaque pixel goes to its nearest colour; for a close pair, the pixels of either are
+        // counted by where they lie from one to the other: at one, between, at the other.
+        let mut thirds = vec![[0usize; 3]; close.len()];
+        for p in pix.iter().filter(|p| p[3] > 0.9) {
+            let c = rgb255(p);
+            let Some(near) = (0..palette.len()).min_by(|&i, &j| dist2(c, palette[i].map(f64::from)).total_cmp(&dist2(c, palette[j].map(f64::from))))
+            else {
+                continue;
+            };
+            for (k, &(i, j)) in close.iter().enumerate() {
+                if near == i || near == j {
+                    let (a, b) = (palette[i].map(f64::from), palette[j].map(f64::from));
+                    let t = (0..3).map(|ch| (c[ch] - a[ch]) * (b[ch] - a[ch])).sum::<f64>() / dist2(a, b).max(1e-9);
+                    thirds[k][if t < 1.0 / 3.0 {
+                        0
+                    } else if t <= 2.0 / 3.0 {
+                        1
+                    } else {
+                        2
+                    }] += 1;
+                }
+            }
+        }
+        // The pair with the most between it, if that is no fewer than a third of what the lesser
+        // end has.
+        let filled = |t: &[usize; 3]| t[1] as f64 / (t[0].min(t[2]).max(1)) as f64;
+        let Some((k, _)) = thirds.iter().enumerate().filter(|(_, t)| filled(t) >= 1.0 / 3.0).max_by(|a, b| filled(a.1).total_cmp(&filled(b.1)))
+        else {
+            return palette;
+        };
+        let ((i, j), t) = (close[k], thirds[k]);
+        let (na, nb) = ((t[0] + t[1] / 2).max(1) as f64, (t[2] + t[1] / 2).max(1) as f64);
+        palette[i] = [0, 1, 2].map(|ch| ((f64::from(palette[i][ch]) * na + f64::from(palette[j][ch]) * nb) / (na + nb)).round() as u8);
+        palette.remove(j);
+    }
+}
+
 /// Colours the current palette cannot explain. `residual` is each pixel's error after the best blend
 /// of the known classes (see `unmix`); a solid run of pixels (a pixel and its four neighbours agree)
 /// with a large error is a colour that is missing, such as the small accent that was too few

crates/trace/src/logo/pipeline.rs

@@ -4,7 +4,7 @@ use super::field::{blur_plane, upsample};
 use super::geom::{Cubic, finite};
 use super::march::{area2, contours};
 use super::outline::{Stats, Style, fit_outline};
-use super::palette::{WHITE_MIN, auto_palette, flat_fraction, parse_hex, unexplained_colours};
+use super::palette::{WHITE_MIN, auto_palette, flat_fraction, fold_tones, parse_hex, unexplained_colours};
 use super::restore::RestoreParams;
 use super::unmix::{Px, count_ambiguous, unmix};
 use crate::{Raster, TraceError, TraceParams, TraceResult, TracedPath};
@@ -317,11 +317,15 @@ fn distance(a: [u8; 3], b: [u8; 3]) -> f64 {
     (0..3).map(|k| (f64::from(a[k]) - f64::from(b[k])).powi(2)).sum::<f64>().sqrt()
 }
 
+type Colours = Vec<[u8; 3]>;
+
 /// The colours to trace: those the caller named (white is always its own class so it is skipped;
-/// colours closer than [`SAME_COLOUR`] count as one; at most [`MAX_COLOURS`]) or the ones found.
-fn choose_palette(params: &TraceParams, pix: &[Px], w: usize, h: usize) -> Result<Vec<[u8; 3]>, TraceError> {
+/// colours closer than [`SAME_COLOUR`] count as one; at most [`MAX_COLOURS`]) or the ones found,
+/// the tones of one colour folded into it ([`fold_tones`]); and with them the colours before folding.
+fn choose_palette(params: &TraceParams, pix: &[Px], w: usize, h: usize) -> Result<(Colours, Colours), TraceError> {
     if params.logo_colors.is_empty() {
-        return Ok(auto_palette(pix, w, h, (params.colors as usize).clamp(2, MAX_COLOURS)));
+        let found = auto_palette(pix, w, h, (params.colors as usize).clamp(2, MAX_COLOURS));
+        return Ok((fold_tones(pix, found.clone()), found));
     }
     let mut palette: Vec<[u8; 3]> = Vec::new();
     for s in &params.logo_colors {
@@ -332,7 +336,7 @@ fn choose_palette(params: &TraceParams, pix: &[Px], w: usize, h: usize) -> Resul
             palette.push(c);
         }
     }
-    Ok(palette)
+    Ok((palette.clone(), palette))
 }
 
 /// Trace a flat-colour logo.
@@ -342,11 +346,13 @@ pub(crate) fn trace_logo(img: &Raster, params: &TraceParams, max_anchors: usize)
         return Ok(TraceResult::default());
     }
     let (mut pix, mut w, mut h, mut factor) = working_copy(img, 1);
-    let mut palette = choose_palette(params, &pix, w, h)?;
+    // (`tones`: the colours as found, each tone of an unevenly lit colour on its own. Whether the
+    // image is flat art is asked of them: a paper's tones are flat colour too.)
+    let (mut palette, tones) = choose_palette(params, &pix, w, h)?;
     if palette.is_empty() {
         return Ok(TraceResult::default());
     }
-    let fraction = flat_fraction(&pix, w, h, &palette);
+    let fraction = flat_fraction(&pix, w, h, &tones);
     if fraction < MIN_FLAT {
         return Err(TraceError::NotFlat { fraction });
     }
@@ -366,6 +372,8 @@ pub(crate) fn trace_logo(img: &Raster, params: &TraceParams, max_anchors: usize)
             planes
         } else {
             palette.extend(extra.into_iter().take(MAX_COLOURS - palette.len()));
+            // (A colour nothing explained may be one more tone of a colour that is there.)
+            palette = fold_tones(&pix, palette);
             classes = classes_for(&palette);
             unmix(&pix, w, h, &classes).0
         }

crates/trace/src/logo/tests.rs

@@ -413,3 +413,17 @@ fn random_small_images_and_settings_never_panic() {
         }
     }
 }
+
+/// A scan's paper is darker in one corner than in another: it is still one colour, not a band of
+/// paths for each tone of it.
+#[test]
+fn uneven_paper_is_one_colour() {
+    let img = Raster::from_fn(160, 120, |x, y| {
+        let shade = 1.0 - 0.1 * f64::from(x) / 160.0 - 0.04 * (f64::from(y) / 40.0).sin().abs();
+        let ink = (40..120).contains(&x) && (30..90).contains(&y);
+        let c = if ink { [40.0, 60.0, 150.0] } else { [236.0, 230.0, 214.0] };
+        [(c[0] * shade) as u8, (c[1] * shade) as u8, (c[2] * shade) as u8, 255]
+    });
+    let res = trace(&img, &crate::preset("Flat Logo").unwrap());
+    assert_eq!(res.paths.len(), 2, "{:?}", res.paths.iter().map(|p| (p.color, p.pixels)).collect::<Vec<_>>());
+}

crates/trace/src/tests.rs

@@ -1250,3 +1250,18 @@ fn a_hard_edged_circle_is_a_circle() {
     let [TracedPath { shape: Some(TracedShape::Ellipse { center, rx, ry, .. }), .. }] = res.paths.as_slice() else { panic!("{:?}", res.paths) };
     assert!(rx == ry && (rx - 30.0).abs() < 0.3 && center.distance(Point::new(50.0, 50.0)) < 0.1, "{center:?} {rx} {ry}");
 }
+
+/// Levelling moves no end far: a long line two degrees off level stays where the image has it.
+#[test]
+fn a_long_line_two_degrees_askew_is_not_levelled() {
+    let slope = 2f64.to_radians().tan();
+    let img = Raster::from_fn(240, 40, |x, y| {
+        let top = 12.0 + slope * (f64::from(x) - 20.0);
+        let inside = (20..220).contains(&x) && (f64::from(y) + 0.5 - top - 4.0).abs() <= 4.0;
+        if inside { [0, 0, 0, 255] } else { [255, 255, 255, 255] }
+    });
+    let res = trace(&img, &TraceParams { ignore_white: true, snap_curves_to_lines: true, ..Default::default() });
+    let b = res.paths[0].path.bounds().unwrap();
+    // 200 px at 2° rises 7 px: levelled, the bar would be 8 px tall, not 15.
+    assert!(b.height() > 13.0, "{b:?}");
+}

docs/image-trace-quality.md

@@ -1,6 +1,6 @@
 # Image Trace quality
 
-> **Last reviewed:** 2026-10-13 · **Last updated:** 2026-10-13 · **Change:** minor (Gradients: on linear gradients 6 Colors goes from ΔE 2.12 in 6.4 paths to 0.62 in 3.4)
+> **Last reviewed:** 2026-10-13 · **Last updated:** 2026-10-13 · **Change:** minor (Flat Logo on scans: 470 paths and 21 px off to 8.5 paths and 0.09 px)
 
 What Image Trace (`crates/trace`) makes of images whose right answer is known, measured by a harness and
 compared with the numbers before each change. Nothing here is a judgement by eye, and nothing is compared
@@ -57,7 +57,10 @@ The letters are drawn by hand from lines and curves: the repository has no font
 | outside px | how far the trace reaches outside the image: a curve that strays |
 
 Black-and-white presets trace black: on the scanned variant their ΔE includes the paper's and ink's own
-colours. `–` means the measure does not apply; `all` that nothing was traced.
+colours. Silhouettes has its threshold at 200, not 128: its outline lies where the image
+crosses that tone, about 0.3 px outside the true edge on anti-aliased art and 0.8 px on blurred art; with
+the threshold at 128 the same preset is 0.110 px off on its inputs (1.00 px at most), as the other
+black-and-white presets are. `–` means the measure does not apply; `all` that nothing was traced.
 
 ## Baseline and now
 
@@ -81,7 +84,7 @@ Each preset on the inputs it is meant for, all sizes and variants.
 | Technical Drawing | polygons, star, letter A, lines, askew shapes and lines | 2.73 | 13.67 | 0.210 | 1.43 | 105.76 | 4.7 | 31 | 2.01 | 100 | 9 | 85 | 5.9 | – | – | – | – | 0.1 | 0.0 | – | – | – |
 | Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 10 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 | – | – | – |
 
-### Now (with Gradients)
+### Now (with Flat Logo's tones folded)
 
 | preset | inputs | ΔE | edge ΔE | off mean | off max | missed max | paths | anchors | × art | lines % | upright % | corners % | kinks | odd colours | odd px | gap px | overlap px | specks | outside px | centre off | width off | anchors a stroke | shapes % | grouped % | gradient paths | found % | angle off | ramp off |
 |:--|:--|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|--:|
@@ -97,9 +100,9 @@ Each preset on the inputs it is meant for, all sizes and variants.
 | Sketched Art | circle, ellipses, badge with a hole, letter D, lines | 2.71 | 12.02 | 0.185 | 1.00 | 105.61 | 1.8 | 16 | 1.42 | 19 | 8 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Silhouettes | circle, ellipses, badge with a hole, letter D | 2.98 | 19.30 | 0.524 | 2.19 | 2.19 | 1.2 | 14 | 1.64 | 12 | 9 | 93 | 0.4 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Line Art | lines | 2.62 | 9.49 | 0.056 | 0.99 | 105.72 | 5.4 | 43 | 2.14 | 40 | 0 | – | – | – | – | – | – | 0.1 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Technical Drawing | polygons, star, letter A, lines, askew shapes and lines | 2.71 | 12.14 | 0.178 | 4.21 | 105.64 | 4.7 | 38 | 2.55 | 81 | 24 | 78 | 0.8 | – | – | – | – | 0.5 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
+| Technical Drawing | polygons, star, letter A, lines, askew shapes and lines | 2.65 | 10.88 | 0.126 | 1.46 | 105.64 | 4.7 | 38 | 2.55 | 81 | 19 | 78 | 0.8 | – | – | – | – | 0.5 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Outline | lines | 2.60 | 9.16 | 0.055 | 2.94 | 105.75 | 5.0 | 14 | 0.71 | 95 | 4 | – | – | – | – | – | – | 0.0 | 0.0 | 0.053 | 0.02 | 2.4 | – | – | 0.0 | – | – | – |
-| Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 10 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 | – | – | – | – | – | 0.0 | – | – | – |
+| Flat Logo | two touching halves, four-colour badge | 0.48 | 3.47 | 0.090 | 0.82 | 0.78 | 3.9 | 49 | 3.85 | 40 | 10 | 80 | 2.6 | 0.0 | 0 | 10.6 | – | 0.9 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Default with Shapes | plain shapes | 3.18 | 9.53 | 0.102 | 1.00 | 1.00 | 6.0 | 40 | 1.32 | 41 | 27 | – | – | – | – | 15.8 | 11.5 | 0.0 | 0.0 | – | – | – | 57 | – | 0.0 | – | – | – |
 | 6 Colors with Shapes | plain shapes | 0.91 | 6.82 | 0.089 | 0.99 | 0.99 | 6.0 | 43 | 1.43 | 49 | 33 | – | – | 0.0 | 0 | 10.2 | 10.9 | 0.0 | 0.0 | – | – | – | 62 | – | 0.0 | – | – | – |
 | 6 Colors with Auto Grouping | two touching halves, four-colour badge | 0.55 | 4.99 | 0.140 | 1.34 | 1.19 | 4.0 | 49 | 3.07 | 39 | 16 | 91 | 6.1 | 0.0 | 0 | 0.3 | 0.3 | 0.0 | 0.0 | – | – | – | – | 27 | 0.0 | – | – | – |
@@ -110,7 +113,7 @@ Each preset on the inputs it is meant for, all sizes and variants.
 | High Fidelity Photo, no Gradients | two-stop gradient, three-stop gradient in a disc | 0.79 | 2.98 | – | – | – | 38.1 | 3827 | – | 31 | 30 | – | – | – | – | 0.0 | – | 1.1 | 0.0 | – | – | – | – | – | 0.0 | 0 | – | – |
 | High Fidelity Photo with Gradients | two-stop gradient, three-stop gradient in a disc | 0.46 | 1.31 | – | – | – | 20.6 | 759 | – | 9 | 5 | – | – | – | – | 0.0 | – | 2.9 | 0.0 | – | – | – | – | – | 1.0 | 86 | 1.5 | 21 |
 
-The sections below are the numbers now (with Gradients).
+The sections below are the numbers now (with Flat Logo's tones folded).
 
 ## 1. Each preset on the inputs it is meant for
 
@@ -130,9 +133,9 @@ All sizes and variants (clean, aliased, blurred, noisy, scanned) of those inputs
 | Sketched Art | circle, ellipses, badge with a hole, letter D, lines | 2.71 | 12.02 | 0.185 | 1.00 | 105.61 | 1.8 | 16 | 1.42 | 19 | 8 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Silhouettes | circle, ellipses, badge with a hole, letter D | 2.98 | 19.30 | 0.524 | 2.19 | 2.19 | 1.2 | 14 | 1.64 | 12 | 9 | 93 | 0.4 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Line Art | lines | 2.62 | 9.49 | 0.056 | 0.99 | 105.72 | 5.4 | 43 | 2.14 | 40 | 0 | – | – | – | – | – | – | 0.1 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Technical Drawing | polygons, star, letter A, lines, askew shapes and lines | 2.71 | 12.14 | 0.178 | 4.21 | 105.64 | 4.7 | 38 | 2.55 | 81 | 24 | 78 | 0.8 | – | – | – | – | 0.5 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
+| Technical Drawing | polygons, star, letter A, lines, askew shapes and lines | 2.65 | 10.88 | 0.126 | 1.46 | 105.64 | 4.7 | 38 | 2.55 | 81 | 19 | 78 | 0.8 | – | – | – | – | 0.5 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Outline | lines | 2.60 | 9.16 | 0.055 | 2.94 | 105.75 | 5.0 | 14 | 0.71 | 95 | 4 | – | – | – | – | – | – | 0.0 | 0.0 | 0.053 | 0.02 | 2.4 | – | – | 0.0 | – | – | – |
-| Flat Logo | two touching halves, four-colour badge | 0.43 | 3.53 | 3.106 | 88.50 | 0.78 | 69.9 | 352 | 38.92 | 38 | 10 | 80 | 237.0 | 0.0 | 0 | 13.8 | – | 59.1 | 0.2 | – | – | – | – | – | 0.0 | – | – | – |
+| Flat Logo | two touching halves, four-colour badge | 0.48 | 3.47 | 0.090 | 0.82 | 0.78 | 3.9 | 49 | 3.85 | 40 | 10 | 80 | 2.6 | 0.0 | 0 | 10.6 | – | 0.9 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Default with Shapes | plain shapes | 3.18 | 9.53 | 0.102 | 1.00 | 1.00 | 6.0 | 40 | 1.32 | 41 | 27 | – | – | – | – | 15.8 | 11.5 | 0.0 | 0.0 | – | – | – | 57 | – | 0.0 | – | – | – |
 | 6 Colors with Shapes | plain shapes | 0.91 | 6.82 | 0.089 | 0.99 | 0.99 | 6.0 | 43 | 1.43 | 49 | 33 | – | – | 0.0 | 0 | 10.2 | 10.9 | 0.0 | 0.0 | – | – | – | 62 | – | 0.0 | – | – | – |
 | 6 Colors with Auto Grouping | two touching halves, four-colour badge | 0.55 | 4.99 | 0.140 | 1.34 | 1.19 | 4.0 | 49 | 3.07 | 39 | 16 | 91 | 6.1 | 0.0 | 0 | 0.3 | 0.3 | 0.0 | 0.0 | – | – | – | – | 27 | 0.0 | – | – | – |
@@ -214,7 +217,7 @@ All sizes and variants (clean, aliased, blurred, noisy, scanned) of those inputs
 | Black and White Logo | curved shapes | 0.03 | 1.48 | 0.024 | 0.16 | 0.16 | 1.2 | 20 | 2.12 | 21 | 21 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Black and White Logo | polygons | 0.06 | 2.36 | 0.040 | 0.47 | 1.26 | 1.7 | 14 | 1.24 | 93 | 8 | 95 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Black and White Logo | thin lines | 0.59 | 6.00 | 0.105 | 0.50 | 77.21 | 10.3 | 44 | 2.18 | 90 | 10 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Black and White Logo | askew shapes | 0.89 | 20.99 | 0.613 | 4.21 | 9.63 | 4.0 | 25 | 1.03 | 98 | 98 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
+| Black and White Logo | askew shapes | 0.49 | 11.14 | 0.234 | 1.46 | 9.63 | 4.0 | 25 | 1.03 | 98 | 70 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Black and White Logo | plain shapes | 0.08 | 1.56 | 0.033 | 0.31 | 0.30 | 6.0 | 55 | 1.84 | 58 | 52 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | 0 | – | 0.0 | – | – | – |
 | Black and White Logo | flat colour art | 19.90 | 17.76 | 0.157 | 0.30 | 179.51 | 1.0 | 18 | 1.12 | 23 | 23 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Black and White Logo | gradient, photo | 38.97 | 38.53 | – | – | – | 9.0 | 634 | – | 73 | 54 | – | – | – | – | – | – | 1.2 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
@@ -246,7 +249,7 @@ All sizes and variants (clean, aliased, blurred, noisy, scanned) of those inputs
 | Technical Drawing | curved shapes | 0.03 | 1.48 | 0.024 | 0.16 | 0.16 | 1.2 | 20 | 2.12 | 21 | 21 | 100 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Technical Drawing | polygons | 0.06 | 2.36 | 0.040 | 0.47 | 1.26 | 1.7 | 14 | 1.23 | 94 | 8 | 95 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Technical Drawing | thin lines | 0.50 | 5.46 | 0.109 | 0.50 | 55.93 | 15.3 | 62 | 3.12 | 86 | 14 | – | – | – | – | – | – | 3.3 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Technical Drawing | askew shapes | 0.88 | 20.92 | 0.611 | 4.21 | 4.19 | 4.3 | 26 | 1.08 | 98 | 98 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
+| Technical Drawing | askew shapes | 0.48 | 11.07 | 0.233 | 1.46 | 2.11 | 4.3 | 26 | 1.08 | 98 | 70 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Technical Drawing | plain shapes | 0.08 | 1.63 | 0.035 | 0.33 | 0.33 | 6.0 | 55 | 1.82 | 60 | 52 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | 0 | – | 0.0 | – | – | – |
 | Technical Drawing | flat colour art | 19.90 | 17.76 | 0.157 | 0.30 | 179.51 | 1.0 | 18 | 1.12 | 23 | 23 | 0 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Technical Drawing | gradient, photo | 38.94 | 38.51 | – | – | – | 20.0 | 659 | – | 73 | 51 | – | – | – | – | – | – | 11.7 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
@@ -266,7 +269,7 @@ All sizes and variants (clean, aliased, blurred, noisy, scanned) of those inputs
 | Flat Logo | plain shapes | 0.16 | 3.09 | 0.061 | 0.30 | 0.27 | 6.0 | 70 | 2.32 | 57 | 4 | – | – | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 | – | – | – | 0 | – | 0.0 | – | – | – |
 | Flat Logo | flat colour art | 0.07 | 1.53 | 0.065 | 0.31 | 0.27 | 3.0 | 36 | 3.51 | 47 | 11 | 100 | 0.0 | 0.0 | 0 | 6.8 | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Flat Logo | gradient, photo | refused | | | | | | | | | | | | | | | | | | | | | | | | | | |
-| Flat Logo | linear gradients | 6.77 | 6.85 | – | – | – | 8918.3 | 41974 | – | 7 | 0 | – | – | – | – | 2733.2 | – | 7382.7 | 0.2 | – | – | – | – | – | 0.0 | 0 | – | – |
+| Flat Logo | linear gradients | 6.49 | 6.47 | – | – | – | 484.0 | 4773 | – | 58 | 0 | – | – | – | – | 146.0 | – | 446.7 | 0.1 | – | – | – | – | – | 0.0 | 0 | – | – |
 | Default with Shapes | curved shapes | 0.08 | 3.19 | 0.058 | 0.38 | 0.38 | 1.8 | 13 | 1.44 | 14 | 14 | 100 | 0.0 | – | – | 12.2 | 7.4 | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Default with Shapes | polygons | 0.06 | 2.34 | 0.040 | 0.47 | 1.26 | 2.0 | 14 | 1.26 | 88 | 5 | 95 | 0.0 | – | – | 0.0 | 2.0 | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Default with Shapes | thin lines | 0.54 | 4.53 | 0.049 | 0.52 | 105.72 | 3.3 | 25 | 1.27 | 40 | 0 | – | – | – | – | 0.0 | 18.3 | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
@@ -404,10 +407,10 @@ All sizes and variants (clean, aliased, blurred, noisy, scanned) of those inputs
 | Line Art | blurred | 1.56 | 16.06 | 0.061 | 0.99 | 105.72 | 3.0 | 53 | 2.65 | 22 | 0 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Line Art | noisy | 1.03 | 4.10 | 0.035 | 0.44 | 56.07 | 8.0 | 50 | 2.50 | 43 | 0 | – | – | – | – | – | – | 1.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Line Art | scanned | 13.54 | 19.55 | 0.062 | 0.92 | 105.68 | 3.0 | 51 | 2.55 | 8 | 0 | – | – | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Technical Drawing | clean | 0.31 | 6.70 | 0.168 | 4.21 | 55.93 | 4.9 | 26 | 1.58 | 93 | 27 | 95 | 0.0 | – | – | – | – | 0.7 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Technical Drawing | aliased | 0.56 | 20.39 | 0.275 | 2.42 | 55.44 | 6.2 | 31 | 1.85 | 96 | 28 | 94 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Technical Drawing | blurred | 1.12 | 17.47 | 0.168 | 2.41 | 105.64 | 2.4 | 49 | 3.84 | 47 | 19 | 30 | 2.7 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Technical Drawing | noisy | 1.68 | 6.90 | 0.160 | 2.13 | 31.79 | 7.0 | 34 | 1.98 | 93 | 26 | 95 | 0.0 | – | – | – | – | 1.4 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
+| Technical Drawing | clean | 0.23 | 4.73 | 0.092 | 1.46 | 55.93 | 4.9 | 26 | 1.58 | 93 | 21 | 95 | 0.0 | – | – | – | – | 0.7 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
+| Technical Drawing | aliased | 0.50 | 19.60 | 0.238 | 1.37 | 55.44 | 6.2 | 31 | 1.85 | 96 | 23 | 94 | 0.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
+| Technical Drawing | blurred | 1.06 | 16.51 | 0.130 | 1.16 | 105.64 | 2.4 | 49 | 3.84 | 47 | 13 | 30 | 2.7 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
+| Technical Drawing | noisy | 1.59 | 5.74 | 0.103 | 1.17 | 31.79 | 7.0 | 34 | 1.98 | 93 | 21 | 95 | 0.0 | – | – | – | – | 1.4 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Technical Drawing | scanned | 14.69 | 20.15 | 0.136 | 1.17 | 105.57 | 2.4 | 73 | 5.42 | 49 | 12 | 39 | 3.0 | – | – | – | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Outline | clean | 0.52 | 3.89 | 0.038 | 2.94 | 105.73 | 3.3 | 7 | 0.35 | 100 | 7 | – | – | – | – | – | – | 0.0 | 0.0 | 0.056 | 0.02 | 2.1 | – | – | 0.0 | – | – | – |
 | Outline | aliased | 0.62 | 13.33 | 0.169 | 0.88 | 55.55 | 11.0 | 51 | 2.55 | 64 | 9 | – | – | – | – | – | – | 0.0 | 0.0 | 0.154 | 0.01 | 4.6 | – | – | 0.0 | – | – | – |
@@ -418,7 +421,7 @@ All sizes and variants (clean, aliased, blurred, noisy, scanned) of those inputs
 | Flat Logo | aliased | 0.13 | 5.87 | 0.218 | 0.65 | 0.65 | 3.0 | 31 | 1.96 | 44 | 19 | 50 | 0.0 | 0.0 | 0 | 5.8 | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Flat Logo | blurred | 0.54 | 8.33 | 0.052 | 0.62 | 0.78 | 3.0 | 28 | 1.78 | 43 | 16 | 50 | 0.0 | 0.0 | 0 | 5.8 | – | 0.0 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Flat Logo | noisy | 0.81 | 1.77 | 0.076 | 0.39 | 0.32 | 3.5 | 44 | 2.63 | 31 | 0 | 100 | 1.0 | 0.0 | 0 | 6.9 | – | 0.5 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
-| Flat Logo | scanned | 1.31 | 4.15 | 21.204 | 88.50 | 0.66 | 470.5 | 2251 | 255.53 | 11 | 0 | 62 | 1658.0 | 0.0 | 0 | 58.0 | – | 413.5 | 0.2 | – | – | – | – | – | 0.0 | – | – | – |
+| Flat Logo | scanned | 1.68 | 3.76 | 0.088 | 0.82 | 0.66 | 8.5 | 128 | 10.04 | 23 | 0 | 62 | 17.0 | 0.0 | 0 | 35.1 | – | 5.5 | 0.0 | – | – | – | – | – | 0.0 | – | – | – |
 | Default with Shapes | clean | 0.13 | 2.62 | 0.055 | 0.35 | 0.34 | 6.0 | 38 | 1.28 | 55 | 48 | – | – | – | – | 16.4 | 8.2 | 0.0 | 0.0 | – | – | – | 72 | – | 0.0 | – | – | – |
 | Default with Shapes | aliased | 0.63 | 16.01 | 0.264 | 1.00 | 0.90 | 6.0 | 31 | 1.03 | 45 | 31 | – | – | – | – | 19.2 | 17.7 | 0.0 | 0.0 | – | – | – | 33 | – | 0.0 | – | – | – |
 | Default with Shapes | blurred | 1.58 | 15.95 | 0.096 | 0.81 | 1.00 | 6.0 | 51 | 1.70 | 17 | 17 | – | – | – | – | 8.0 | 7.6 | 0.0 | 0.0 | – | – | – | 33 | – | 0.0 | – | – | – |
@@ -505,22 +508,22 @@ One trace at a time on this machine (all cores); memory is the peak allocated ab
 
 | preset | image | megapixels | result |
 |:--|:--|--:|:--|
-| Default | photo-like | 1 | 0.05 s, 29 paths, 6278 anchors, 12 MB |
+| Default | photo-like | 1 | 0.04 s, 29 paths, 6278 anchors, 12 MB |
 | Default | four-colour badge | 1 | 0.03 s, 3 paths, 64 anchors, 12 MB |
-| Auto Color | photo-like | 1 | 0.18 s, 732 paths, 45265 anchors, 25 MB |
+| Auto Color | photo-like | 1 | 0.16 s, 732 paths, 45265 anchors, 23 MB |
 | Auto Color | four-colour badge | 1 | 0.05 s, 5 paths, 84 anchors, 12 MB |
-| High Fidelity Photo | photo-like | 1 | 0.23 s, 968 paths, 117041 anchors, 170 MB |
-| High Fidelity Photo | four-colour badge | 1 | 0.07 s, 6 paths, 172 anchors, 23 MB |
-| Low Fidelity Photo | photo-like | 1 | 0.21 s, 129 paths, 23014 anchors, 103 MB |
-| Low Fidelity Photo | four-colour badge | 1 | 0.06 s, 6 paths, 136 anchors, 23 MB |
+| High Fidelity Photo | photo-like | 1 | 0.22 s, 968 paths, 117041 anchors, 168 MB |
+| High Fidelity Photo | four-colour badge | 1 | 0.06 s, 6 paths, 172 anchors, 23 MB |
+| Low Fidelity Photo | photo-like | 1 | 0.14 s, 129 paths, 23014 anchors, 104 MB |
+| Low Fidelity Photo | four-colour badge | 1 | 0.05 s, 6 paths, 136 anchors, 23 MB |
 | 3 Colors | photo-like | 1 | 0.09 s, 9 paths, 3341 anchors, 18 MB |
 | 3 Colors | four-colour badge | 1 | 0.05 s, 4 paths, 88 anchors, 13 MB |
-| 6 Colors | photo-like | 1 | 0.10 s, 78 paths, 9076 anchors, 24 MB |
-| 6 Colors | four-colour badge | 1 | 0.06 s, 5 paths, 84 anchors, 12 MB |
+| 6 Colors | photo-like | 1 | 0.10 s, 78 paths, 9076 anchors, 23 MB |
+| 6 Colors | four-colour badge | 1 | 0.05 s, 5 paths, 84 anchors, 12 MB |
 | 16 Colors | photo-like | 1 | 0.12 s, 178 paths, 20470 anchors, 31 MB |
-| 16 Colors | four-colour badge | 1 | 0.06 s, 5 paths, 88 anchors, 12 MB |
-| Shades of Gray | photo-like | 1 | 0.10 s, 81 paths, 6698 anchors, 40 MB |
-| Shades of Gray | four-colour badge | 1 | 0.08 s, 10 paths, 725 anchors, 35 MB |
+| 16 Colors | four-colour badge | 1 | 0.05 s, 5 paths, 88 anchors, 12 MB |
+| Shades of Gray | photo-like | 1 | 0.10 s, 81 paths, 6698 anchors, 43 MB |
+| Shades of Gray | four-colour badge | 1 | 0.07 s, 10 paths, 725 anchors, 34 MB |
 | Black and White Logo | photo-like | 1 | 0.05 s, 71 paths, 4933 anchors, 8 MB |
 | Black and White Logo | four-colour badge | 1 | 0.02 s, 1 paths, 47 anchors, 6 MB |
 | Sketched Art | photo-like | 1 | 0.04 s, 5 paths, 2873 anchors, 8 MB |
@@ -529,131 +532,133 @@ One trace at a time on this machine (all cores); memory is the peak allocated ab
 | Silhouettes | four-colour badge | 1 | 0.02 s, 1 paths, 24 anchors, 6 MB |
 | Line Art | photo-like | 1 | 0.04 s, 54 paths, 4495 anchors, 8 MB |
 | Line Art | four-colour badge | 1 | 0.02 s, 1 paths, 38 anchors, 6 MB |
-| Technical Drawing | photo-like | 1 | 0.05 s, 221 paths, 6258 anchors, 8 MB |
+| Technical Drawing | photo-like | 1 | 0.04 s, 221 paths, 6258 anchors, 8 MB |
 | Technical Drawing | four-colour badge | 1 | 0.02 s, 1 paths, 47 anchors, 6 MB |
-| Outline | photo-like | 1 | 0.05 s, 45 paths, 4110 anchors, 16 MB |
+| Outline | photo-like | 1 | 0.06 s, 45 paths, 4110 anchors, 16 MB |
 | Outline | four-colour badge | 1 | 0.03 s, 1 paths, 38 anchors, 11 MB |
-| Flat Logo | photo-like | 1 | refused after 0.10 s (not flat art), 40 MB |
+| Flat Logo | photo-like | 1 | refused after 0.15 s (not flat art), 40 MB |
 | Flat Logo | four-colour badge | 1 | 0.69 s, 5 paths, 78 anchors, 146 MB |
-| Default with Shapes | photo-like | 1 | 0.04 s, 29 paths, 6278 anchors, 12 MB |
-| Default with Shapes | four-colour badge | 1 | 0.03 s, 3 paths, 63 anchors, 12 MB |
-| 6 Colors with Shapes | photo-like | 1 | 0.24 s, 78 paths, 9076 anchors, 24 MB |
-| 6 Colors with Shapes | four-colour badge | 1 | 0.06 s, 5 paths, 84 anchors, 12 MB |
-| 6 Colors with Auto Grouping | photo-like | 1 | 0.10 s, 78 paths, 9076 anchors, 24 MB |
-| 6 Colors with Auto Grouping | four-colour badge | 1 | 0.05 s, 5 paths, 84 anchors, 12 MB |
-| Shades of Gray with Auto Grouping | photo-like | 1 | 0.10 s, 81 paths, 6698 anchors, 44 MB |
-| Shades of Gray with Auto Grouping | four-colour badge | 1 | 0.07 s, 10 paths, 725 anchors, 35 MB |
-| High Fidelity Photo with Auto Grouping | photo-like | 1 | 0.28 s, 968 paths, 117041 anchors, 167 MB |
-| High Fidelity Photo with Auto Grouping | four-colour badge | 1 | 0.09 s, 6 paths, 172 anchors, 23 MB |
-| 6 Colors, no Gradients | photo-like | 1 | 0.10 s, 78 paths, 9076 anchors, 24 MB |
+| Default with Shapes | photo-like | 1 | 0.05 s, 29 paths, 6278 anchors, 12 MB |
+| Default with Shapes | four-colour badge | 1 | 0.02 s, 3 paths, 63 anchors, 12 MB |
+| 6 Colors with Shapes | photo-like | 1 | 0.10 s, 78 paths, 9076 anchors, 24 MB |
+| 6 Colors with Shapes | four-colour badge | 1 | 0.05 s, 5 paths, 84 anchors, 12 MB |
+| 6 Colors with Auto Grouping | photo-like | 1 | 0.11 s, 78 paths, 9076 anchors, 24 MB |
+| 6 Colors with Auto Grouping | four-colour badge | 1 | 0.06 s, 5 paths, 84 anchors, 12 MB |
+| Shades of Gray with Auto Grouping | photo-like | 1 | 0.10 s, 81 paths, 6698 anchors, 43 MB |
+| Shades of Gray with Auto Grouping | four-colour badge | 1 | 0.06 s, 10 paths, 725 anchors, 35 MB |
+| High Fidelity Photo with Auto Grouping | photo-like | 1 | 0.27 s, 968 paths, 117041 anchors, 170 MB |
+| High Fidelity Photo with Auto Grouping | four-colour badge | 1 | 0.05 s, 6 paths, 172 anchors, 24 MB |
+| 6 Colors, no Gradients | photo-like | 1 | 0.09 s, 78 paths, 9076 anchors, 23 MB |
 | 6 Colors, no Gradients | four-colour badge | 1 | 0.05 s, 5 paths, 84 anchors, 12 MB |
-| 6 Colors with Gradients | photo-like | 1 | 0.14 s, 78 paths, 9076 anchors, 32 MB |
-| 6 Colors with Gradients | four-colour badge | 1 | 0.07 s, 5 paths, 84 anchors, 12 MB |
-| High Fidelity Photo, no Gradients | photo-like | 1 | 0.24 s, 968 paths, 117041 anchors, 169 MB |
+| 6 Colors with Gradients | photo-like | 1 | 0.13 s, 78 paths, 9076 anchors, 32 MB |
+| 6 Colors with Gradients | four-colour badge | 1 | 0.08 s, 5 paths, 84 anchors, 12 MB |
+| High Fidelity Photo, no Gradients | photo-like | 1 | 0.23 s, 968 paths, 117041 anchors, 170 MB |
 | High Fidelity Photo, no Gradients | four-colour badge | 1 | 0.07 s, 6 paths, 172 anchors, 23 MB |
-| High Fidelity Photo with Gradients | photo-like | 1 | 0.43 s, 968 paths, 117041 anchors, 166 MB |
+| High Fidelity Photo with Gradients | photo-like | 1 | 0.28 s, 968 paths, 117041 anchors, 169 MB |
 | High Fidelity Photo with Gradients | four-colour badge | 1 | 0.09 s, 6 paths, 172 anchors, 23 MB |
-| Default | photo-like | 4 | 0.25 s, 48 paths, 14438 anchors, 49 MB |
-| Default | four-colour badge | 4 | 0.16 s, 3 paths, 72 anchors, 48 MB |
-| Auto Color | photo-like | 4 | 0.72 s, 1469 paths, 149389 anchors, 113 MB |
-| Auto Color | four-colour badge | 4 | 0.30 s, 5 paths, 92 anchors, 46 MB |
-| High Fidelity Photo | photo-like | 4 | 1.05 s, 4479 paths, 337884 anchors, 638 MB |
-| High Fidelity Photo | four-colour badge | 4 | 0.35 s, 6 paths, 200 anchors, 96 MB |
-| Low Fidelity Photo | photo-like | 4 | 0.54 s, 299 paths, 61601 anchors, 392 MB |
-| Low Fidelity Photo | four-colour badge | 4 | 0.33 s, 6 paths, 152 anchors, 97 MB |
-| 3 Colors | photo-like | 4 | 0.38 s, 20 paths, 8473 anchors, 72 MB |
-| 3 Colors | four-colour badge | 4 | 0.28 s, 4 paths, 122 anchors, 53 MB |
-| 6 Colors | photo-like | 4 | 0.42 s, 115 paths, 23295 anchors, 100 MB |
-| 6 Colors | four-colour badge | 4 | 0.27 s, 5 paths, 92 anchors, 46 MB |
-| 16 Colors | photo-like | 4 | 0.36 s, 353 paths, 52770 anchors, 129 MB |
-| 16 Colors | four-colour badge | 4 | 0.24 s, 5 paths, 96 anchors, 47 MB |
-| Shades of Gray | photo-like | 4 | 0.34 s, 137 paths, 18823 anchors, 158 MB |
-| Shades of Gray | four-colour badge | 4 | 0.27 s, 10 paths, 1256 anchors, 135 MB |
+| Default | photo-like | 4 | 0.21 s, 48 paths, 14438 anchors, 49 MB |
+| Default | four-colour badge | 4 | 0.12 s, 3 paths, 72 anchors, 48 MB |
+| Auto Color | photo-like | 4 | 0.46 s, 1469 paths, 149389 anchors, 115 MB |
+| Auto Color | four-colour badge | 4 | 0.22 s, 5 paths, 92 anchors, 47 MB |
+| High Fidelity Photo | photo-like | 4 | 0.75 s, 4479 paths, 337884 anchors, 634 MB |
+| High Fidelity Photo | four-colour badge | 4 | 0.25 s, 6 paths, 200 anchors, 97 MB |
+| Low Fidelity Photo | photo-like | 4 | 0.41 s, 299 paths, 61601 anchors, 402 MB |
+| Low Fidelity Photo | four-colour badge | 4 | 0.25 s, 6 paths, 152 anchors, 96 MB |
+| 3 Colors | photo-like | 4 | 0.29 s, 20 paths, 8473 anchors, 73 MB |
+| 3 Colors | four-colour badge | 4 | 0.19 s, 4 paths, 122 anchors, 51 MB |
+| 6 Colors | photo-like | 4 | 0.30 s, 115 paths, 23295 anchors, 100 MB |
+| 6 Colors | four-colour badge | 4 | 0.22 s, 5 paths, 92 anchors, 46 MB |
+| 16 Colors | photo-like | 4 | 0.34 s, 353 paths, 52770 anchors, 129 MB |
+| 16 Colors | four-colour badge | 4 | 0.24 s, 5 paths, 96 anchors, 46 MB |
+| Shades of Gray | photo-like | 4 | 0.38 s, 137 paths, 18823 anchors, 160 MB |
+| Shades of Gray | four-colour badge | 4 | 0.28 s, 10 paths, 1256 anchors, 137 MB |
 | Black and White Logo | photo-like | 4 | 0.21 s, 208 paths, 13546 anchors, 32 MB |
 | Black and White Logo | four-colour badge | 4 | 0.09 s, 1 paths, 57 anchors, 24 MB |
-| Sketched Art | photo-like | 4 | 0.26 s, 9 paths, 5387 anchors, 32 MB |
-| Sketched Art | four-colour badge | 4 | 0.13 s, 2 paths, 196 anchors, 24 MB |
-| Silhouettes | photo-like | 4 | 0.32 s, 2 paths, 1465 anchors, 36 MB |
-| Silhouettes | four-colour badge | 4 | 0.13 s, 1 paths, 28 anchors, 24 MB |
-| Line Art | photo-like | 4 | 0.30 s, 127 paths, 11330 anchors, 32 MB |
-| Line Art | four-colour badge | 4 | 0.12 s, 1 paths, 42 anchors, 24 MB |
-| Technical Drawing | photo-like | 4 | 0.31 s, 931 paths, 20628 anchors, 32 MB |
-| Technical Drawing | four-colour badge | 4 | 0.13 s, 1 paths, 57 anchors, 24 MB |
-| Outline | photo-like | 4 | 0.39 s, 113 paths, 10815 anchors, 64 MB |
-| Outline | four-colour badge | 4 | 0.20 s, 1 paths, 42 anchors, 44 MB |
-| Flat Logo | photo-like | 4 | refused after 0.19 s (not flat art), 40 MB |
-| Flat Logo | four-colour badge | 4 | 1.31 s, 5 paths, 69 anchors, 146 MB |
-| Default with Shapes | photo-like | 4 | 0.30 s, 48 paths, 14438 anchors, 49 MB |
-| Default with Shapes | four-colour badge | 4 | 0.15 s, 3 paths, 72 anchors, 48 MB |
-| 6 Colors with Shapes | photo-like | 4 | 0.45 s, 115 paths, 23295 anchors, 100 MB |
-| 6 Colors with Shapes | four-colour badge | 4 | 0.31 s, 5 paths, 92 anchors, 46 MB |
-| 6 Colors with Auto Grouping | photo-like | 4 | 0.44 s, 115 paths, 23295 anchors, 100 MB |
-| 6 Colors with Auto Grouping | four-colour badge | 4 | 0.30 s, 5 paths, 92 anchors, 47 MB |
-| Shades of Gray with Auto Grouping | photo-like | 4 | 0.47 s, 137 paths, 18823 anchors, 162 MB |
-| Shades of Gray with Auto Grouping | four-colour badge | 4 | 0.39 s, 10 paths, 1256 anchors, 137 MB |
-| High Fidelity Photo with Auto Grouping | photo-like | 4 | 1.34 s, 4479 paths, 337884 anchors, 615 MB |
+| Sketched Art | photo-like | 4 | 0.20 s, 9 paths, 5387 anchors, 32 MB |
+| Sketched Art | four-colour badge | 4 | 0.09 s, 2 paths, 196 anchors, 24 MB |
+| Silhouettes | photo-like | 4 | 0.22 s, 2 paths, 1465 anchors, 36 MB |
+| Silhouettes | four-colour badge | 4 | 0.09 s, 1 paths, 28 anchors, 24 MB |
+| Line Art | photo-like | 4 | 0.21 s, 127 paths, 11330 anchors, 32 MB |
+| Line Art | four-colour badge | 4 | 0.09 s, 1 paths, 42 anchors, 24 MB |
+| Technical Drawing | photo-like | 4 | 0.21 s, 931 paths, 20628 anchors, 32 MB |
+| Technical Drawing | four-colour badge | 4 | 0.09 s, 1 paths, 57 anchors, 24 MB |
+| Outline | photo-like | 4 | 0.28 s, 113 paths, 10815 anchors, 64 MB |
+| Outline | four-colour badge | 4 | 0.14 s, 1 paths, 42 anchors, 44 MB |
+| Flat Logo | photo-like | 4 | refused after 0.14 s (not flat art), 40 MB |
+| Flat Logo | four-colour badge | 4 | 0.68 s, 5 paths, 69 anchors, 146 MB |
+| Default with Shapes | photo-like | 4 | 0.21 s, 48 paths, 14438 anchors, 49 MB |
+| Default with Shapes | four-colour badge | 4 | 0.10 s, 3 paths, 72 anchors, 48 MB |
+| 6 Colors with Shapes | photo-like | 4 | 0.28 s, 115 paths, 23295 anchors, 100 MB |
+| 6 Colors with Shapes | four-colour badge | 4 | 0.19 s, 5 paths, 92 anchors, 46 MB |
+| 6 Colors with Auto Grouping | photo-like | 4 | 0.29 s, 115 paths, 23295 anchors, 100 MB |
+| 6 Colors with Auto Grouping | four-colour badge | 4 | 0.19 s, 5 paths, 92 anchors, 46 MB |
+| Shades of Gray with Auto Grouping | photo-like | 4 | 0.31 s, 137 paths, 18823 anchors, 162 MB |
+| Shades of Gray with Auto Grouping | four-colour badge | 4 | 0.28 s, 10 paths, 1256 anchors, 137 MB |
+| High Fidelity Photo with Auto Grouping | photo-like | 4 | 0.93 s, 4479 paths, 337884 anchors, 612 MB |
 | High Fidelity Photo with Auto Grouping | four-colour badge | 4 | 0.28 s, 6 paths, 200 anchors, 97 MB |
-| 6 Colors, no Gradients | photo-like | 4 | 0.35 s, 115 paths, 23295 anchors, 100 MB |
-| 6 Colors, no Gradients | four-colour badge | 4 | 0.26 s, 5 paths, 92 anchors, 46 MB |
-| 6 Colors with Gradients | photo-like | 4 | 0.66 s, 115 paths, 23295 anchors, 128 MB |
-| 6 Colors with Gradients | four-colour badge | 4 | 0.39 s, 5 paths, 92 anchors, 46 MB |
-| High Fidelity Photo, no Gradients | photo-like | 4 | 0.79 s, 4479 paths, 337884 anchors, 617 MB |
-| High Fidelity Photo, no Gradients | four-colour badge | 4 | 0.27 s, 6 paths, 200 anchors, 97 MB |
-| High Fidelity Photo with Gradients | photo-like | 4 | 1.14 s, 4479 paths, 337884 anchors, 636 MB |
-| High Fidelity Photo with Gradients | four-colour badge | 4 | 0.40 s, 6 paths, 200 anchors, 97 MB |
-| Default | photo-like | 16 | 1.15 s, 127 paths, 34034 anchors, 199 MB |
-| Default | four-colour badge | 16 | 0.64 s, 3 paths, 88 anchors, 184 MB |
-| Auto Color | photo-like | 16 | 2.06 s, 5390 paths, 454670 anchors, 280 MB |
-| Auto Color | four-colour badge | 16 | 1.31 s, 5 paths, 112 anchors, 185 MB |
-| High Fidelity Photo | photo-like | 16 | 5.28 s, 31139 paths, 1192715 anchors, 880 MB |
-| High Fidelity Photo | four-colour badge | 16 | 1.36 s, 6 paths, 264 anchors, 257 MB |
-| Low Fidelity Photo | photo-like | 16 | 3.01 s, 2036 paths, 182778 anchors, 754 MB |
-| Low Fidelity Photo | four-colour badge | 16 | 1.55 s, 6 paths, 180 anchors, 263 MB |
-| 3 Colors | photo-like | 16 | 1.82 s, 76 paths, 23024 anchors, 290 MB |
-| 3 Colors | four-colour badge | 16 | 1.30 s, 4 paths, 190 anchors, 205 MB |
-| 6 Colors | photo-like | 16 | 1.76 s, 470 paths, 60831 anchors, 298 MB |
-| 6 Colors | four-colour badge | 16 | 1.27 s, 5 paths, 112 anchors, 185 MB |
-| 16 Colors | photo-like | 16 | 1.93 s, 1973 paths, 145642 anchors, 303 MB |
-| 16 Colors | four-colour badge | 16 | 1.26 s, 5 paths, 114 anchors, 185 MB |
-| Shades of Gray | photo-like | 16 | 2.01 s, 686 paths, 53654 anchors, 407 MB |
-| Shades of Gray | four-colour badge | 16 | 1.76 s, 9 paths, 2208 anchors, 270 MB |
-| Black and White Logo | photo-like | 16 | 1.45 s, 1128 paths, 45273 anchors, 129 MB |
-| Black and White Logo | four-colour badge | 16 | 0.88 s, 1 paths, 69 anchors, 88 MB |
-| Sketched Art | photo-like | 16 | 1.60 s, 15 paths, 11486 anchors, 128 MB |
-| Sketched Art | four-colour badge | 16 | 0.75 s, 2 paths, 361 anchors, 88 MB |
-| Silhouettes | photo-like | 16 | 2.21 s, 3 paths, 3350 anchors, 144 MB |
-| Silhouettes | four-colour badge | 16 | 0.51 s, 1 paths, 32 anchors, 95 MB |
-| Line Art | photo-like | 16 | 1.21 s, 713 paths, 37370 anchors, 129 MB |
-| Line Art | four-colour badge | 16 | 0.44 s, 1 paths, 49 anchors, 88 MB |
-| Technical Drawing | photo-like | 16 | 1.52 s, 4577 paths, 76559 anchors, 130 MB |
-| Technical Drawing | four-colour badge | 16 | 0.54 s, 1 paths, 69 anchors, 88 MB |
-| Outline | photo-like | 16 | 1.83 s, 632 paths, 34884 anchors, 256 MB |
-| Outline | four-colour badge | 16 | 0.91 s, 1 paths, 49 anchors, 176 MB |
-| Flat Logo | photo-like | 16 | refused after 0.19 s (not flat art), 40 MB |
-| Flat Logo | four-colour badge | 16 | 1.04 s, 5 paths, 67 anchors, 146 MB |
-| Default with Shapes | photo-like | 16 | 1.38 s, 127 paths, 34034 anchors, 199 MB |
-| Default with Shapes | four-colour badge | 16 | 0.64 s, 3 paths, 88 anchors, 184 MB |
-| 6 Colors with Shapes | photo-like | 16 | 1.66 s, 470 paths, 60831 anchors, 298 MB |
-| 6 Colors with Shapes | four-colour badge | 16 | 1.19 s, 5 paths, 112 anchors, 185 MB |
-| 6 Colors with Auto Grouping | photo-like | 16 | 2.10 s, 470 paths, 60831 anchors, 298 MB |
-| 6 Colors with Auto Grouping | four-colour badge | 16 | 1.08 s, 5 paths, 112 anchors, 184 MB |
-| Shades of Gray with Auto Grouping | photo-like | 16 | 3.20 s, 686 paths, 53654 anchors, 407 MB |
-| Shades of Gray with Auto Grouping | four-colour badge | 16 | 2.32 s, 9 paths, 2208 anchors, 270 MB |
-| High Fidelity Photo with Auto Grouping | photo-like | 16 | 10.42 s, 31139 paths, 1192715 anchors, 880 MB |
-| High Fidelity Photo with Auto Grouping | four-colour badge | 16 | 1.11 s, 6 paths, 264 anchors, 257 MB |
-| 6 Colors, no Gradients | photo-like | 16 | 1.21 s, 470 paths, 60831 anchors, 298 MB |
-| 6 Colors, no Gradients | four-colour badge | 16 | 0.86 s, 5 paths, 112 anchors, 184 MB |
-| 6 Colors with Gradients | photo-like | 16 | 3.03 s, 470 paths, 60831 anchors, 512 MB |
-| 6 Colors with Gradients | four-colour badge | 16 | 1.28 s, 5 paths, 112 anchors, 185 MB |
-| High Fidelity Photo, no Gradients | photo-like | 16 | 4.74 s, 31139 paths, 1192715 anchors, 880 MB |
-| High Fidelity Photo, no Gradients | four-colour badge | 16 | 1.12 s, 6 paths, 264 anchors, 257 MB |
-| High Fidelity Photo with Gradients | photo-like | 16 | 7.70 s, 31139 paths, 1192715 anchors, 880 MB |
-| High Fidelity Photo with Gradients | four-colour badge | 16 | 2.65 s, 6 paths, 264 anchors, 257 MB |
+| 6 Colors, no Gradients | photo-like | 4 | 0.31 s, 115 paths, 23295 anchors, 100 MB |
+| 6 Colors, no Gradients | four-colour badge | 4 | 0.21 s, 5 paths, 92 anchors, 47 MB |
+| 6 Colors with Gradients | photo-like | 4 | 0.65 s, 115 paths, 23295 anchors, 128 MB |
+| 6 Colors with Gradients | four-colour badge | 4 | 0.30 s, 5 paths, 92 anchors, 46 MB |
+| High Fidelity Photo, no Gradients | photo-like | 4 | 0.72 s, 4479 paths, 337884 anchors, 618 MB |
+| High Fidelity Photo, no Gradients | four-colour badge | 4 | 0.24 s, 6 paths, 200 anchors, 94 MB |
+| High Fidelity Photo with Gradients | photo-like | 4 | 1.07 s, 4479 paths, 337884 anchors, 612 MB |
+| High Fidelity Photo with Gradients | four-colour badge | 4 | 0.34 s, 6 paths, 200 anchors, 97 MB |
+| Default | photo-like | 16 | 1.13 s, 127 paths, 34034 anchors, 199 MB |
+| Default | four-colour badge | 16 | 0.56 s, 3 paths, 88 anchors, 184 MB |
+| Auto Color | photo-like | 16 | 1.86 s, 5390 paths, 454670 anchors, 274 MB |
+| Auto Color | four-colour badge | 16 | 0.91 s, 5 paths, 112 anchors, 184 MB |
+| High Fidelity Photo | photo-like | 16 | 4.54 s, 31139 paths, 1192715 anchors, 880 MB |
+| High Fidelity Photo | four-colour badge | 16 | 1.61 s, 6 paths, 264 anchors, 263 MB |
+| Low Fidelity Photo | photo-like | 16 | 2.14 s, 2036 paths, 182778 anchors, 754 MB |
+| Low Fidelity Photo | four-colour badge | 16 | 1.18 s, 6 paths, 180 anchors, 257 MB |
+| 3 Colors | photo-like | 16 | 1.92 s, 76 paths, 23024 anchors, 289 MB |
+| 3 Colors | four-colour badge | 16 | 1.46 s, 4 paths, 190 anchors, 213 MB |
+| 6 Colors | photo-like | 16 | 2.24 s, 470 paths, 60831 anchors, 298 MB |
+| 6 Colors | four-colour badge | 16 | 1.19 s, 5 paths, 112 anchors, 184 MB |
+| 16 Colors | photo-like | 16 | 1.24 s, 1973 paths, 145642 anchors, 297 MB |
+| 16 Colors | four-colour badge | 16 | 1.42 s, 5 paths, 114 anchors, 184 MB |
+| Shades of Gray | photo-like | 16 | 1.85 s, 686 paths, 53654 anchors, 407 MB |
+| Shades of Gray | four-colour badge | 16 | 1.51 s, 9 paths, 2208 anchors, 270 MB |
+| Black and White Logo | photo-like | 16 | 1.31 s, 1128 paths, 45273 anchors, 129 MB |
+| Black and White Logo | four-colour badge | 16 | 0.56 s, 1 paths, 69 anchors, 88 MB |
+| Sketched Art | photo-like | 16 | 1.40 s, 15 paths, 11486 anchors, 128 MB |
+| Sketched Art | four-colour badge | 16 | 0.57 s, 2 paths, 361 anchors, 88 MB |
+| Silhouettes | photo-like | 16 | 1.80 s, 3 paths, 3350 anchors, 144 MB |
+| Silhouettes | four-colour badge | 16 | 0.53 s, 1 paths, 32 anchors, 95 MB |
+| Line Art | photo-like | 16 | 1.26 s, 713 paths, 37370 anchors, 129 MB |
+| Line Art | four-colour badge | 16 | 0.49 s, 1 paths, 49 anchors, 88 MB |
+| Technical Drawing | photo-like | 16 | 2.03 s, 4577 paths, 76559 anchors, 130 MB |
+| Technical Drawing | four-colour badge | 16 | 0.97 s, 1 paths, 69 anchors, 88 MB |
+| Outline | photo-like | 16 | 2.07 s, 632 paths, 34884 anchors, 256 MB |
+| Outline | four-colour badge | 16 | 0.92 s, 1 paths, 49 anchors, 176 MB |
+| Flat Logo | photo-like | 16 | refused after 0.23 s (not flat art), 40 MB |
+| Flat Logo | four-colour badge | 16 | 1.02 s, 5 paths, 67 anchors, 146 MB |
+| Default with Shapes | photo-like | 16 | 1.21 s, 127 paths, 34034 anchors, 199 MB |
+| Default with Shapes | four-colour badge | 16 | 0.59 s, 3 paths, 88 anchors, 184 MB |
+| 6 Colors with Shapes | photo-like | 16 | 1.53 s, 470 paths, 60831 anchors, 298 MB |
+| 6 Colors with Shapes | four-colour badge | 16 | 1.10 s, 5 paths, 112 anchors, 185 MB |
+| 6 Colors with Auto Grouping | photo-like | 16 | 1.46 s, 470 paths, 60831 anchors, 298 MB |
+| 6 Colors with Auto Grouping | four-colour badge | 16 | 1.04 s, 5 paths, 112 anchors, 184 MB |
+| Shades of Gray with Auto Grouping | photo-like | 16 | 1.93 s, 686 paths, 53654 anchors, 407 MB |
+| Shades of Gray with Auto Grouping | four-colour badge | 16 | 2.38 s, 9 paths, 2208 anchors, 263 MB |
+| High Fidelity Photo with Auto Grouping | photo-like | 16 | 9.50 s, 31139 paths, 1192715 anchors, 880 MB |
+| High Fidelity Photo with Auto Grouping | four-colour badge | 16 | 1.19 s, 6 paths, 264 anchors, 257 MB |
+| 6 Colors, no Gradients | photo-like | 16 | 1.43 s, 470 paths, 60831 anchors, 299 MB |
+| 6 Colors, no Gradients | four-colour badge | 16 | 1.04 s, 5 paths, 112 anchors, 185 MB |
+| 6 Colors with Gradients | photo-like | 16 | 3.19 s, 470 paths, 60831 anchors, 512 MB |
+| 6 Colors with Gradients | four-colour badge | 16 | 1.59 s, 5 paths, 112 anchors, 185 MB |
+| High Fidelity Photo, no Gradients | photo-like | 16 | 4.57 s, 31139 paths, 1192715 anchors, 880 MB |
+| High Fidelity Photo, no Gradients | four-colour badge | 16 | 1.15 s, 6 paths, 264 anchors, 257 MB |
+| High Fidelity Photo with Gradients | photo-like | 16 | 6.21 s, 31139 paths, 1192715 anchors, 880 MB |
+| High Fidelity Photo with Gradients | four-colour badge | 16 | 2.82 s, 6 paths, 264 anchors, 257 MB |
 
 ## Revision history
 
 | date | change |
 |:--|:--|
+| 2026-10-13 | Flat Logo: the tones a scan's uneven paper makes of one colour are one colour (scans: 470 paths and 21 px off to 8.5 paths and 0.09 px) |
+| 2026-10-13 | Snap Curves To Lines moves no end of a line by more than 1.6 px: long lines a degree or two off stay as the image has them (Technical Drawing: largest distance 4.21 px to 1.46) |
 | 2026-10-13 | Gradients (off unless asked for): areas that are a linear gradient are found before the palette is made and traced as one path with a gradient fill; linear-gradient inputs with known lines and stops, and four columns for them |
 | 2026-10-13 | Auto Grouping (off unless asked for): each path that has others inside it is grouped with them; a "grouped %" column, and three presets measured with the option on |
 | 2026-10-13 | Shapes (off unless asked for): filled outlines that are a circle, an ellipse, a rectangle or a regular polygon come out as that shape; corners whose pixel is mostly outside the shape are corners; plain-shape inputs and a "shapes %" column |