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Change Log

Versioned according to Semantic Versioning.

Unreleased

0.19.1 - 2024-07-01

Fixed:

  • Correct version in ocrd-tool.json

0.19.0 - 2024-07-01

Fixed:

  • segment*/recognize: delegate process instead of overwrite for docstring
  • segment*/recognize: more robust polygon handling

Changed:

  • more and more concrete tests
  • 🔥 require Shapely v2
  • Update tesseract to 5.4.1, #214

0.18.1 - 2024-03-07

Fixed:

  • Build, tests and documentation related to make install-{tesserocr,tesseract}, #200

0.18.0 - 2024-02-19

Changed:

  • tesseract and tesserocr included as submodules, installable via make instal-tesser{act,ocr}, #197
  • Updated docker setup accordingly, #197

0.17.0 - 2023-03-23

Fixed:

  • segment/recognize: fix shrink_polygons
  • segment/recognize: fix reinit scope (for xpath_model and auto_model)
  • CI: test multiple Python versions independent of ocrd/core image
  • CI: speed up build for EOL Python 3.6
  • CI: chmod o+w tessdata directory of PPA/OS Tesseract
  • deps-ubuntu: allow installation of PPA Tesseract to fail (for newer OS)

Changed:

  • adapted to Shapely v2
  • *: inherit from recognize (but override logger)
  • segment*: delegate constructor instead of wrapping instance
  • requires ocrd==2.48

0.16.0 - 2022-10-25

Changed:

  • require newer OCR-D/core to include OCR-D/core#934, #188
  • no more need to set TESSDATA_PREFIX
  • improved and up-to-date README

0.15.0 - 2022-10-23

Added:

  • binarize: dpi numerical parameter to specify pixel density, #186
  • binarize: tiseg boolean parameter to specify whether to call tessapi.AnalyseLayout for text-image separation, #186

Changed:

  • regonize: improved polygon handling, #186
  • resources: proper support for moduledir, companion to OCR-D/core#904, #187

0.14.0 - 2022-08-14

Changed:

  • list all resources in the ocrd-tool.json, #184, OCR-D/core#800
  • custom --list-resources handler, #176

0.13.6 - 2021-09-28

Fixed:

  • segment/recognize: no find_tables when already looking for cells

Changed:

  • segment/recognize: add param find_staves (for pageseg_apply_music_mask)
  • segment/recognize: 🔥 set find_staves=false by default

0.13.5 - 2021-07-26

Fixed:

  • recognize: prevent invalid empty Unicode glyph choices

0.13.4 - 2021-07-20

Fixed:

  • recognize: only reset API when xpath_model or auto_model is active
  • recognize: for glyph level output, reduce choice confidence threshold
  • recognize: for glyph level output, skip choices with same text
  • recognize: avoid projecting empty text results from lower levels

Changed:

  • recognize: allow setting init-time (model-related) parameters

0.13.3 - 2021-07-01

Changed:

  • recognize: on glyph level, fall back to RIL.SYMBOL if ChoiceIterator is empty

0.13.2 - 2021-06-30

Fixed:

  • updated requirements

0.13.1 - 2021-06-30

Fixed:

  • deps-ubuntu/Docker: adapt to resmgr location mechanism, link to PPA models
  • recognize: 🐛 skip detected segments if polygon cannot be made valid

Changed:

  • deskew: add line-level operation for script detection
  • recognize: query more choices for textequiv_level=glyph if available
  • recognize: 🔥 reset Tesseract API when applying model/param settings per segment
  • recognize: 👀 allow configuring Tesseract parameters per segment via XPath queries
  • recognize: 👀 allow selecting recognition model per segment via XPath queries
  • recognize: 👀 allow selecting recognition model automatically via confidence

0.13.0 - 2021-06-30

Changed:

  • segment*/recognize: annotate clipped,binarized AlternativeImage on page level
  • binarize: add page level, make default

0.12.0 - 2021-03-05

Changed:

  • resource lookup in a function to avoid module-level instantiation, #172
  • skip recognition of elements if they have pc:TextEquiv and overwrite_text is false-y, #170

Added:

  • New parameter oem to explicitly set the engine backend to use, #168, #170

0.11.0 - 2021-01-29

Changed:

  • Models are resolved via OCR-D/core resource manager default location ($XDG_DATA_HOME) or $TESSDATA_PREFIX, #166

0.10.1 - 2020-12-10

Fixed:

  • segment*/recognize: reduce minimal region height to sane value
  • segment*/recognize: also disable text recognition if model is empty
  • segment-{region,line,word}: apply only single-level segmentation again
  • segment*/recognize: skip empty non-text blocks and all-reject words

Changed:

  • segment*/recognize: add option shrink_polygons, default to false
  • segment*/recognize: add Tesseract version to meta-data
  • recognize: add option tesseract_parameters to expose all variables

0.10.0 - 2020-12-01

Fixed:

  • when padding images, add the offset to coords of new segments
  • when segmenting regions, skip empty output coords more robustly
  • deskew/segment/recognize: skip empty input images more robustly
  • crop: fix pageId of new derived image
  • recognize: fix missing RIL for terminal GetUTF8Text()
  • recognize: fix Confidence() vs MeanTextConf()

Changed:

  • recognize: add all-in-one segmentation with flexible entry point
  • recognize: re-parameterize to segmentation_level+textequiv_level
  • recognize: 🔥 rename overwrite_words to overwrite_segments
  • segment*: delegate to recognize
  • recognize: also annotate orientation and skew when segmenting regions
  • fontshape: new processor for TextStyle detection via pre-LSTM models
  • crop: also use existing text regions, if any
  • deskew: delegate to core for reflection and rotation
  • deskew: always get new image and set feature deskewed (even for 0°)

0.9.5 - 2020-10-02

Fixed:

0.9.4 - 2020-09-24

Fixed:

  • recognize: be robust to different input image modes, Pillow#4925
  • logging according to OCR-D/core#599

0.9.3 - 2020-09-15

Fixed:

  • segmentation: ensure new elements fit into their parent coords
  • segmentation: ensure valid coords

0.9.2 - 2020-09-04

Fixed:

  • segment-region: just ignore region outside of page frame, #145
  • deskew: add suffix to AlternativeImage file ID, #148

0.9.1 - 2020-08-16

Fixed:

  • crop: allow running on deskewed page, clip Border to original frame
  • deskew: refactoring artefact from #133, #142

0.9.0 - 2020-08-06

Changed:

  • All processors write to a single file group, #133
  • All processors set pg:PcGts/pcGtsId to file_id consistently, #136

0.8.5 - 2020-06-05

Fixed:

  • segment-region: ensure polygons are within page/Border

0.8.4 - 2020-06-05

Changed:

  • segment-region: in sparse_text mode, also add text lines

Fixed:

  • Always set path to TESSDATA_PREFIX for tesserocr.get_languages, #129

0.8.3 - 2020-05-12

Fixed:

  • recognize: ignore empty RO group

Changed:

  • recognize: add padding parameter

0.8.2 - 2020-04-08

Fixed:

  • segment-region: no empty (invalid) ReadingOrder when no regions
  • segment-region: add sparse_text mode choice
  • segment-line: make intersection with parent more robust
  • segment-table: use SPARSE_TEXT mode for cells

Changed:

  • Depend on OCR-D/core v2.4.4
  • Depend on sirfz/tesserocr v2.51

0.8.1 - 2020-02-17

Fixed:

  • recognize: fix buggy RTL behavior, glyph confidence defaults to 1, #112, #113

0.8.0 - 2020-01-24

Changed:

  • recognize: use lstm_choice_mode=2 for textequiv_level=glyph, #110
  • recognize: add char white/un/blacklisting parameters enhancement, #109

Added:

  • all: add dpi parameter as manual override to image metadata enhancement, #108

0.7.0 - 2020-01-23

Added:

  • segment-table: new processor that adds table cells as text regions, #104
  • raw_lines option, #104
  • interpret overwrite_regions more consistently, #104
  • annotate @orientation (independent of dedicated deskewing processor) for vertical and @type for all other text blocks, #104
  • no separators and noise regions in reading order, #104

Changed:

  • docker image built on Ubuntu 18.04, #94, #97
  • Consistent setup of docker, #97

0.6.0 - 2019-11-05

Changed:

  • Depend on OCR-D/core v2.0.0

0.5.1 - 2019-10-31

Fixed:

  • Correct version in ocrd-tool.json, #76

0.5.0 - 2019-10-26

  • Adapt to new core image API, #80
  • Use OCR core >= unstable 2.0.0a1

0.4.1 - 2019-10-29

  • Adapt to feature selection/filtering mechanism for derived images in core
  • Fixes for image-feature-related corner cases in crop and deskew
  • Use explicit (second) output fileGrp when producing derived images
  • Upgrade to upstream tesserocr 2.4.1
  • Use OCR core >= stable 1.0.0

0.4.0 - 2019-08-21

Changed:

  • 🔥 common.py is now part of OCR-D/core's ocrd_utils, OCR-D/core#268, #49
  • many fixes and improvements to crop, deskew, binarize
  • proper handling of orientaton on page level
  • updated requirements

0.3.0 - 2019-06-28

Changed:

  • Use basename of input file for output name
  • Use .xml filename extension for PAGE output
  • Warn about existing border or regions in crop
  • Use PSM.SPARSE_TEXT without tables in crop
  • Filter unreliable regions in crop
  • Add padding around border in crop
  • Delete existing regions in segment_region
  • Cover vertical text and tables in segment_region
  • Add parameter find_tables in segment_region
  • Add parameter crop_polygons in segment_region
  • Add parameter overwrite_regions in segment_region
  • Add parameter overwrite_lines in segment_line
  • Add parameter overwrite_words in segment_word
  • Add page/region-level processor deskew
  • Add page/region/line-level processor binarize
  • Respect AlternativeImage on all levels

0.2.2 - 2019-05-20

Changed:

  • Add simple page cropping processor crop
  • Respect border cropping in segment_word
  • Add parameter overwrite_words in recognize
  • Make higher TextEquivs consistent after recognize

Fixed:

  • Remove invalid @externalRef from MetadataItem
  • Retain pageId in output (i.e. link to structMap)

0.2.1 - 2019-02-28

Fixed:

  • workspace.add_file was wrong in segment_word

0.2.0 - 2019-02-28

Changed:

  • Adapt to OCR-D/core 1.0.0b5 API

0.1.3 - 2019-01-04

Fixed:

  • Override locale to POSIX before importing tesserocr

Changed:

  • split recognizing existing glyphs vs. all in word

0.1.2 - 2018-09-03

Fixed:

  • arithmetic average (not product) for line conf, #22

0.1.1 - 2018-08-31

Fixed:

  • robust conf calculation (when no result), #21

0.1.0 - 2018-08-30

Changed:

  • Segment on all levels
  • Word and line confidences
  • Recognition with proper support for textequiv_level, drop page level