tesseract: Tesseract seemingly stuck

Environment

  • Tesseract Version: Latest master
  • Commit Number: (23ed59bd7bca777e4e104c4ee540843373aa9869
  • Platform: Linux gentoo-x13 5.11.7-gentoo-dist #1 SMP Wed Mar 17 21:03:41 -00 2021 x86_64 AMD Ryzen 7 PRO 4750U with Radeon Graphics AuthenticAMD GNU/Linux

Current Behavior:

Tesseract hangs, seemingly never finishes

Expected Behavior:

Tesseract doesn’t hang and produces output normally

GDB backtrace (interrupted after more than 5 minutes):

merlijn@gentoo-x13 ~/archive/tesseract-src/tesseract $ time TESSDATA_PREFIX=/usr/share/tessdata LD_LIBRARY_PATH=`pwd` LD_LIBRARY_PATH=$LD_LIBARY_PATH:`pwd`/.libs gdb --args ./.libs/tesseract /tmp/sim_new-york-times_1900-01-11_49_15-603_0008.ppm - hocr
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Reading symbols from ./.libs/tesseract...
(gdb) r
Starting program: /home/merlijn/archive/tesseract-src/tesseract/.libs/tesseract /tmp/sim_new-york-times_1900-01-11_49_15-603_0008.ppm - hocr
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
 <head>
  <title></title>
  <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
  <meta name='ocr-system' content='tesseract 5.0.0-alpha-20201231-545-g23ed5' />
  <meta name='ocr-capabilities' content='ocr_page ocr_carea ocr_par ocr_line ocrx_word ocrp_wconf'/>
 </head>
 <body>
Estimating resolution as 246
^C
Program received signal SIGINT, Interrupt.
0x00007ffff7ec49b6 in tesseract::CLIST_ITERATOR::forward (this=this@entry=0x7fffffffbec0)
    at src/ccutil/clst.cpp:265
265	  return current->data;
(gdb) bt
#0  0x00007ffff7ec49b6 in tesseract::CLIST_ITERATOR::forward (this=this@entry=0x7fffffffbec0)
    at src/ccutil/clst.cpp:265
#1  0x00007ffff7ec4b8d in tesseract::CLIST::add_sorted (this=<optimized out>,
    comparator=comparator@entry=
    0x7ffff7d86b90 <tesseract::SortByBoxLeft<tesseract::ColPartition>(void const*, void const*)>,
    unique=unique@entry=true, new_data=<optimized out>, new_data@entry=0x5555bf4f66b0)
    at src/ccutil/clst.cpp:176
#2  0x00007ffff7e2cdf7 in tesseract::BBGrid<tesseract::ColPartition, tesseract::ColPartition_CLIST, tesseract::ColPartition_C_IT>::InsertBBox (this=this@entry=0x55555b031130, h_spread=h_spread@entry=true,
    v_spread=v_spread@entry=true, bbox=0x5555bf4f66b0) at src/textord/bbgrid.h:551
#3  0x00007ffff7e3f664 in tesseract::ColPartitionGrid::ComputeTotalOverlap (
    this=this@entry=0x5555555aec68, overlap_grid=overlap_grid@entry=0x7fffffffc158)
    at src/textord/colpartitiongrid.cpp:329
#4  0x00007ffff7e71620 in tesseract::StrokeWidth::DetectAndRemoveNoise (this=0x55555558c420,
    pre_overlap=95268, grid_box=..., block=0x55555558bf20, part_grid=0x5555555aec68,
    diacritic_blobs=0x7fffffffc688) at src/textord/strokewidth.cpp:1350
#5  0x00007ffff7e729da in tesseract::StrokeWidth::FindInitialPartitions (
    this=this@entry=0x55555558c420, pageseg_mode=pageseg_mode@entry=tesseract::PSM_AUTO,
    rerotation=..., find_problems=find_problems@entry=true, block=block@entry=0x55555558bf20,
    diacritic_blobs=diacritic_blobs@entry=0x7fffffffc688, part_grid=0x5555555aec68,
    big_parts=0x5555555aec98, skew_angle=0x7fffffffc340) at src/textord/strokewidth.cpp:1310
#6  0x00007ffff7e72c08 in tesseract::StrokeWidth::GradeBlobsIntoPartitions (this=0x55555558c420,
    pageseg_mode=pageseg_mode@entry=tesseract::PSM_AUTO, rerotation=...,
    block=block@entry=0x55555558bf20, nontext_pix=..., denorm=<optimized out>, cjk_script=false,
    projection=0x5555555aecc0, diacritic_blobs=0x7fffffffc688, part_grid=0x5555555aec68,
    big_parts=0x5555555aec98) at src/textord/strokewidth.cpp:379
#7  0x00007ffff7e2be71 in tesseract::ColumnFinder::FindBlocks (this=this@entry=0x5555555aeb30,
    pageseg_mode=pageseg_mode@entry=tesseract::PSM_AUTO, scaled_color=...,
    scaled_factor=<optimized out>, input_block=input_block@entry=0x55555558bf20, photo_mask_pix=...,
    thresholds_pix=..., grey_pix=..., pixa_debug=0x7ffff7c6abd0, blocks=0x7fffffffc5e8,
    diacritic_blobs=0x7fffffffc688, to_blocks=0x7fffffffc690) at src/textord/colfind.cpp:296
#8  0x00007ffff7d5509b in tesseract::Tesseract::AutoPageSeg (this=0x7ffff7c47010,
    pageseg_mode=tesseract::PSM_AUTO, blocks=0x5555555b0c90, to_blocks=0x7fffffffc690,
    diacritic_blobs=0x7fffffffc688, osd_tess=<optimized out>, osr=0x7fffffffca40)
    at src/ccmain/pagesegmain.cpp:226
#9  0x00007ffff7d5555d in tesseract::Tesseract::SegmentPage (this=0x7ffff7c47010,
    input_file=<optimized out>, blocks=0x5555555b0c90, osd_tess=osd_tess@entry=0x0,
    osr=osr@entry=0x7fffffffca40) at src/ccmain/pagesegmain.cpp:140
#10 0x00007ffff7d227bf in tesseract::TessBaseAPI::FindLines (this=0x7fffffffd780)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/9.2.0/include/g++-v9/bits/basic_string.h:2300
#11 0x00007ffff7d24f64 in tesseract::TessBaseAPI::Recognize (this=0x7fffffffd780, monitor=0x0)
    at src/api/baseapi.cpp:838
#12 0x00007ffff7d2552a in tesseract::TessBaseAPI::ProcessPage (this=this@entry=0x7fffffffd780,
    pix=0x5555555b1c50, page_index=page_index@entry=0,
    filename=filename@entry=0x7fffffffdf54 "/tmp/sim_new-york-times_1900-01-11_49_15-603_0008.ppm",
    retry_config=retry_config@entry=0x0, timeout_millisec=timeout_millisec@entry=0, renderer=
    0x5555555a2810) at src/api/baseapi.cpp:1259
#13 0x00007ffff7d26172 in tesseract::TessBaseAPI::ProcessPagesInternal (this=0x7fffffffd780,
    filename=<optimized out>, retry_config=0x0, timeout_millisec=0, renderer=0x5555555a2810)
    at src/api/baseapi.cpp:1218
#14 0x00007ffff7d2673f in tesseract::TessBaseAPI::ProcessPages (this=this@entry=0x7fffffffd780,
    filename=filename@entry=0x7fffffffdf54 "/tmp/sim_new-york-times_1900-01-11_49_15-603_0008.ppm",
    retry_config=retry_config@entry=0x0, timeout_millisec=timeout_millisec@entry=0,
    renderer=<optimized out>) at src/api/baseapi.cpp:1071
#15 0x0000555555558295 in main (argc=<optimized out>, argv=<optimized out>)
    at src/api/tesseractmain.cpp:783

Image: https://archive.org/~merlijn/tesseract-images/sim_new-york-times_1900-01-11_49_15-603_0008.ppm

About this issue

  • Original URL
  • State: open
  • Created 3 years ago
  • Comments: 28 (21 by maintainers)

Most upvoted comments

With the code from #3418, the processing ends after 4:30 minutes, when Sauvola binarization is used. The output looks good.

Note that the image size is equivalent to 7 A4 pages, so the processing time is 38 second per page.

With adaptive Otsu I get ‘Empty page!’ after 36 seconds.

+2
amitdo on May 19, 2021
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