Issues

• OCR does not recognize redaction overlay text after image redactions are applied

  layout analysis
  tesseract-ocr/tesseract#4621 · Filter by author ganeshkumarbandari0303-wq opened on Sep 1, 2026
  1

• lstmtraining --convert_to_int leaves the ADAM training_flags_ bit set, unlike official int-optimized traineddata

  bug
  tesseract-ocr/tesseract#4618 · Filter by author mk-startialab opened on Aug 28, 2026

• Regression: Tesseract 5.5.3 recognizes uppercase 'I' as '|' while 5.5.0 recognizes it correctly

  tesseract-ocr/tesseract#4595 · Filter by author NatesanI01 opened on Aug 8, 2026
  5

• write runtime parameters to HOCR output

  tesseract-ocr/tesseract#4591 · Filter by author milahu opened on Aug 2, 2026
  3

  

• Training unicharset_extractor broken in 5.5.3

  tesseract-ocr/tesseract#4589 · Filter by author nguyenq opened on Jul 29, 2026

• textord noise filter silently drops entire text lines in dotted Arabic-script languages (verified: Persian, Arabic, Urdu); textord_noise_rejrows=0 recovers them

  tesseract-ocr/tesseract#4582 · Filter by author aminbm1919 opened on Jul 15, 2026
  4

• Request: enable Private Vulnerability Reporting / security contact

  bug
  tesseract-ocr/tesseract#4580 · Filter by author arexgodofwar opened on Jul 12, 2026
  4

• libtesseract.la needs '-framework Accelerate' to harden build

  tesseract-ocr/tesseract#4552 · Filter by author dmacks opened on May 16, 2026
  3

• Evaluate std::simd / std::experimental::simd

  feature requestperformanceSIMD
  tesseract-ocr/tesseract#4549 · Filter by author stweil opened on Apr 30, 2026

• Arabic words are sometimes reversed in OCR output

  RTL
  tesseract-ocr/tesseract#4544 · Filter by author ryanhossain9797 opened on Apr 27, 2026
  1

• Make PrintVariablesToFile and PrintVariables to print the first line with a correct TSV format

  tesseract-ocr/tesseract#4520 · Filter by author DrkWzrd opened on Feb 26, 2026

• Plans for Tesseract in 2026

  plans
  tesseract-ocr/tesseract#4498 · Filter by author amitdo opened on Jan 8, 2026
  8

• Error in pixReadFromTiffStream: old style jpeg format is not supported

  leptonica
  tesseract-ocr/tesseract#4475 · Filter by author milahu opened on Nov 13, 2025
  7

• OCR is identifying characters incorrectly

  accuracy
  tesseract-ocr/tesseract#4473 · Filter by author saikrishnagopal1227 opened on Nov 11, 2025
  4

• Feature request: ALTO output - integrate IDNEXT attribute

  output
  tesseract-ocr/tesseract#4460 · Filter by author M3ssman opened on Oct 1, 2025
  5

• LSTM models recognize random characters instead of asterisk (*)

  accuracylegacytraineddata
  tesseract-ocr/tesseract#4458 · Filter by author saikrishnagopal1227 opened on Sep 24, 2025
  6

• Sums are not extracted from receipt slip

  tesseract-ocr/tesseract#4456 · Filter by author kobruleht opened on Sep 7, 2025
  4

• write languages parameter value to hocr output file

  feature requestoutput
  tesseract-ocr/tesseract#4455 · Filter by author milahu opened on Aug 29, 2025
  3

• NSIS: Prevent data loss

  nsiswindows
  tesseract-ocr/tesseract#4446 · Filter by author amitdo opened on Aug 1, 2025

• Skew detection gives wrong results

  tesseract-ocr/tesseract#4445 · Filter by author ibm5110 opened on Jul 31, 2025
  1

• lstm can not be generate by --psm 6 lstm.train

  layout analysis
  tesseract-ocr/tesseract#4443 · Filter by author fareign opened on Jul 22, 2025
  1

• Tesseract takes much time when processing image

  binarization
  tesseract-ocr/tesseract#4430 · Filter by author paulius-petkus opened on Jun 20, 2025
  4

• Poor Rotation / Layout detection

  feature requestlayout analysis
  tesseract-ocr/tesseract#4426 · Filter by author CanadianHusky opened on Jun 4, 2025
  23

• --user-patterns can cause assertion failure in UNICHARSET::get_isalpha

  tesseract-ocr/tesseract#4425 · Filter by author krumelmonster opened on Jun 3, 2025
  2

• --psm 10 produces accurate multi-character output despite being single-character mode

  tesseract-ocr/tesseract#4414 · Filter by author tomyjany opened on Apr 21, 2025
  1