Merge origin/main. Conflicts: docs/changelog headers keep both histories;
edit/run.rs keeps EnhanceScan beside main's run_edit_page_image; optimize
images.rs keeps main's scaled() and the crate-visible jpeg(); the German
strings in ui-egui/src/i18n/de.tsv go with that file, which main moved to
craft-i18n. decode_samples now takes main's ImageBudget; a scan clean-up
run shares one sized by the file.
Review (CodeRabbit, scan_clean.rs): a page whose own images and a
scan-holding Form only together cover it now cleans the images and reports
the Form; a page whose images alone cover it reports its Form too. New
regression fails on the old classification.
- A scan drawn only through grouped Form artwork is reported in skipped
(once per form, with every page that draws it) instead of being counted
as no scan; a Form of vector artwork holding only a small picture
(under 36 dpi over its area) still counts as no scan.
- decode_samples checks the filter before the colour space and bit depth,
so a JPEG 2000 image without /ColorSpace or /BitsPerComponent is
reported as JPEG 2000, not as a colour-space or bit-depth problem.
- Optimize and Enhance scanned file no longer start while the other runs:
they share the progress card and capture the same document state.
- docs/gaps.md: background and edge-shadow removal apply to grey and RGB
scans, despeckle also to 1-bit ones.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Scan & OCR ▸ Enhance scanned file (Acrobat's Enhance ▸ Scanned document)
now cleans up scanned pages: background removal (the camera clean-up's
level 0-100), edge shadow removal (book gutters, copier borders) and
despeckle, each its own switch.
The camera tool renders the page and replaces it with a picture, which
would drop a scan's invisible OCR text, comments and links. Instead each
scan image (pictures covering at least half the page, each at least a
tenth) is decoded, cleaned and written back into its own image object at
the same size and colour space: a JPEG stays a JPEG (quality 90), other
grey/RGB images are stored losslessly, a 1-bit image stays 1-bit with its
decode array, and every other dictionary entry (SMask, Interpolate, ...)
is kept. An image several pages share is cleaned once. What can't be
cleaned (CMYK, indexed, JPEG 2000, JBIG2, CCITT, colour-key masks, broken
data, oversized images) is reported, never skipped silently; pages that
are no scan are listed too.
The engine works as a job like Optimize (scan_clean_job, run on a worker
with progress and cancel, apply_scan_clean refuses a result for an older
document state) and applies one undoable step, "Enhance scanned file".
pdfcraft-optimize exposes decode_samples/encode_samples for in-place
pixel edits. camera_clean gains clean_samples for grey and RGB samples
with separate switches and an edge-shadow pass; the camera tool's output
is unchanged. page_enhance_scan drives it headlessly.
Not yet an option of Recognize text. Refs #4119.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
FredApps
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