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ScanTailor OCR 1.0.8

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@github-actions github-actions released this 13 Oct 16:02
· 105 commits to master since this release
v1.0.8
025b705

What's new

Output: color mode

  • The color mode is chosen with three picture buttons (black and white, color / grayscale, mixed) instead of a list; the tooltip names the mode.
  • New panel "Color Mode Detection": "Detect ..." sets the color mode of chosen pages. It is based on ScanTailor Spectre (Leptonica), extended so that colored headings alone don't make a color page and light, small or dark photos are found (picture zones as a second opinion). The settings apply to all projects. Needs OCR (Tesseract).
  • The thumbnails of the Output step can be ordered by color mode.

Output: photo adjustments (idea from ScanTailor Spectre)

  • New panel "Photo Adjustments" with the sliders of a photo editor: temperature, tint, exposure, contrast, highlights, shadows, whites and blacks. They are applied to the finished output, so black and white text, picture detection and OCR are not affected. In mixed mode only the picture zones are changed. "Keep white" keeps a white background white.

Output: new filters (from ScanTailor Experimental)

  • "Remove color noise", "Even out background" (with "Make paper white"), "KNN denoiser" and "Sharpen" under "Enhancement".
  • Five new binarization methods: Gatos, Nick, Singh, Robust and MultiScale; every method has a tooltip saying what it suits.
  • "Even out letter widths" for dewarping: letters near the spine no longer come out too narrow.
  • The enhancement filters run on all cores and after dewarping.

Margins: output size and scaling

  • New panel "Output Size": per page "Match size" (Off / Fill with margins / Scale). "Scale" enlarges or reduces the content to the output size, e.g. for pages scanned at another size; the margins keep their size. "Factor" shows how much.
  • For all pages: an own target size (width × height) and the limits "Enlarge to at most" and "Reduce to at most". It replaces "Lock for now".
  • The Default Parameters window sets these for new pages and new projects.

Select Content

  • "Fill factor" and "Border tolerance" for the automatic content detection, for art books and photo pages (a higher fill factor keeps photos in the content box).
  • The automatic detection uses the BlurDiv threshold, so shadows at the spine are less often taken for content.

Thumbnails and page selection

  • Selected pages have a blue border; only the current page is filled.
  • The context menu "Select" selects pages by pattern (e.g. every second page); "Apply to ..." preselects them. All "Apply to ..." windows share the same page choice with page counts.
  • Sort orders explain their order in a tooltip.

Other

  • Settings: choose the accent color.
  • Page split: redrawn picture buttons.
  • Fix DPI of All Images: several images or size groups can be selected; a replaced image file passes on its resolution if it is plausible.
  • Double-click shows the whole page again after zooming in.
  • Large color JPEG or PNG scans (over 256 MB decoded) load again.
  • Picture shape "Free shape" is called "Contour mask".
  • Qt 6.4 or later is required (Qt 5 is no longer supported).

Fixes

  • DPI changes made in the Fix DPI window were lost when the project file is in the image folder.
  • Drag handles didn't react after switching windows with Alt+Tab.
  • Seed fill fixes from ScanTailor Spectre (picture detection, background).

Downloads

  • Windows: portable ZIP, unpack and run scantailor-ocr.exe.
  • Linux: .deb package and AppImage, built automatically and untested.
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