244 lines
12 KiB
Text
244 lines
12 KiB
Text
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History: (Changes,ChangeLog)
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0.48 Jul09
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fix buffer overflow introduced in 0.46 for filenames
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add codabar barcode
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fix bug, removing melted serifs
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add patch by Chris Lee, i25 barcode recognition + modifications
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fix some false positive numbers "34" (video, gas meter)
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fix problems with 2zZ4 for 10x10 screen font
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better debug output for :;,.
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remove examples, doc and libs part from configure (see below)
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remove doc and examples from the (make install) part to reduce
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dependencies (gs and transfig is not needed for rpm/ebuild)
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gocr only may depend from netpbm, but can live without too
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this will help to install gocr on "exotic" (nonlinux) platforms
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fix gentoo app-text/gocr Bug 243250 src/Makefile: $(CC) $(LDFLAGS) ...
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0.47 fix database recognition for certainty 100 (-a 100)
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insert spaces with certainty 100 (old: 99) to let -a 100 work
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new option -u string for unrecognized chars
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fix: No contrast in image causes division by zero
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reduced false positive recognition of scanned "a496" (Gutenberg Project)
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"d as a" patch ID: 1556112
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add "Windows Pipe Fix", but I hate extra code for bad environments
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improve 7x10, sample 0811qemu1.png (ToDo: not finished)
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change black:white from >4:1 to >3.5:1 as criteria of inversion
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reintroduce static library libPgm2asc.a (make libs) for OSRA project
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add dynamic library (make libs), unused but may help other projects
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0.46 improved context correction (especially helvetica "Il")
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improved recognition of tiny chars "$1", fat "s", "rw" ","
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fix blank spaces problem in filenames
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(http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=316511)
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!!! please check on other platforms and report to me !!!
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there are still problems with special chars (double quodes, backslash)
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better use this way: djpeg -gray -pnm strangefilename.jpg | gocr -
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fix possible problem with database and UTF8 input
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fix hidden bug in pitch/spacing initialization
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reactivate code for output of glued chars and strings
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fix wrong close() call
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remove creation of pgm2asc.a for simplicity (see SF-patch 1827477)
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0.45 minor corrections for c and k
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minus sign is filtered by option -C "--" now, ("\-" was parsed badly)
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clean up old unused code for simplicity (api, frontend)
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fix problem with low height barcodes and barcode removing
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fix problem with readpgm (for multiple images) and database
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PACKAGE_VERSION defined by configure.in AC_INIT + gocr.spec
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0.44 add volume to boxes (negative means white areas inside black areas)
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Fix overflow in despeckling routine (verbose mode, dust removing)
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reactivate composed chars, fix merge_boxes
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fix problems with uncertain line detection and not recognized "7"
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option -a has an effect now for the output
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adaptions to MICR E13-B font (see GnuMICR), ToDo: 4 extra-chars
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fix num_boxes in merge_boxes (affects line detection)
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reduce 2 prompts to one per char in database mode, ^A for skip all
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fix problem with smaller headlines
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fix problems with tall font (4)
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fix includes for non-linux-platforms
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0.43 fix problem with dark frame around image
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support multiple images, ex: giftopnm -image=all a.gif | gocr -
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invert if obviously white on black (black_mass>=4*white_mass)
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improve thresholding for discrete histograms
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(note: this can particularly lead to bad results, will be fixed later)
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speedup for big boxes (especially dark background)
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fix memory leak (setas(same string) + detect_barcode)
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fix uninitialized variables after insert spaces (num_frames)
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fix frame_vector for single pixels (twice + ERROR idx out of range)
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0.42 further parts of recognition engine relaced by vector version
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changed colored debug output for out??.png
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division of glued chars replaced (slower but more accurate)
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fix framing of small font
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fix problem with uninitialized pnm_readpaminit call (CPS 21Nov06)
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better progress output (see progress.[ch]), new image debug output
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switch to the new improved rotation detection
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0.41 (buggy if --with-netpbm=no, apply the pgm-patch!)
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otsu.c concentrates now only on high contrast regions
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fix pnm reads for 2 byte pixels (--with-libpbm=no)
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update man-page (mail me your suggestions)
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fix g++ warnings, float-OPs replaced by int-OPs
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spacing reviewed; make distance() more sensitive
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xml-objects (barcode, melted chars) now also handled with weights
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fix division by zero bug for vertical positioned characters
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default output is UTF8 now, UTF-encoding bug fixed
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added certainty option
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added uninstall to Makefile
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debug image format changed to png (using pipe) or ppm (fall-back)
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much better word spacing (line-by-line based)
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better DOT_ABOVE recognition
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fix output of char groups or strings stored in database, utf8 input
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fix buffer overflow in barcode decode39
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fix lost comma on end of line
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internal vector format added for future use (faster, scalable, rotable)
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line detection extended
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internal list management rewritten to fix memory leaks and segfaults
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0.40 update PNM file reader to maxval > 255
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(make rpm) updated
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barcode-patch UPC_addon by Michael van Rooyen
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CAPITAL_LETTER_A_WITH_OGONEK added
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no "(PICTURE)" output for UTF8+ASCII (better for Mobile OCR project)
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smooth_borders() bug fixed and reworked
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5x7 and prop10 font adaptions
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objects now detected by flood-fill algorithm (better?)
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XML-output changed
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changed auto dust detection (not final)
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0.39 XML output added (subject of change, suggestions are welcome)
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netpbm-link-error fixed in gocr.c and configure.in:
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gocr.c: <config.h> changed to "config.h"
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configure-option --with-netpbm=PATH and --without-netpbm added
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update configure.in according to autoconf 2.57
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wchar_h miss-configuration fixed in pgm2asc.c
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fix compiler warnings
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char filter accepts abbreviations now, like "0-9A-F" (but slow)
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update READMEde.txt
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output barcode tags (also improved recognition)
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fix pnm.c for files like example.eps.pbm
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fix detect.c for barcodes
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fix ocr0n.c 0<->8g
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0.38 move UTF/HTML/TeX decoding to getTextLine, return (char *) now
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out_format HTML step towards detailed XML output
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correct line detection for footnotes (detect.c)
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"y" now seen as vowel (pgm2asc.c), I<vowel> susbtituted by l<vowel>
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é-detection, á-output fixed
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default dust_size is -1 now (auto detection = mean_size/10)
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char filter added
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ex: -C 0123456789ABCDEF - recognize only hexcodes
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man page updated (hopefully correct syntax)
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database bug fixed (small fonts, example by Chris)
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several bugs fixed by W. Webber (thanks)
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speed improved by 3rd-pass matrix filter in pixel() (pixel.c) (code from W. Webber)
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bug in remove_dust (remove.c) fixed
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for fonts bigger than 20x40 smooth_borders() changed (b/w-scans)
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bug in O0-detection fixed
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0.37 best-fit generates probability, not perfect but better results
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bug in line detection removed (happens for lot of small boxes)
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progress output (option -x <fileID|fname>)
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counting versions number as floating point now
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MACRON and DOT_ABOVE (not complete) defined (latin2)
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adaptions for 5x7 and 6x12 screen font
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doc/ocr.tex changed to doc/gocr.html (now independent of LaTeX)
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symbols {} added
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OCR-B font tested succesfull
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better headline/picture distinction
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bug removed (struct box.modifier is wchar_t now)
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known bugs: to much newlines
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0.3.6
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CARON and Omega defined,
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output of not defined chars (HTML="&#xxx;", TeX="\symbol{xxx}")
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system dependend bug: isupper(>255) SIGSEGV fixed
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better line detection for lines with lowercase chars only
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lot of possible SIGSEGV in list_del() fixed
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barcode recognition (UPC,code128)
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.ps .eps via pstopnm supported
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-m 256 switches off the main ocr engine (usefull together with -m 2 for identical chars)
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strings added to database ("ff","ft","special-symbol")
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gocr.tcl adapted to gocr v0.3
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internal detection probability introduced
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0.3.5
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minor and major fixes (string\0 bugs)
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memory leak fixes by Duncan Edwards
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layout analysis or zoning (-m 4) improved,
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now it detects pictures and columns much better
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the behavior of setting threshold (-l) is slightly changed
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wcsdup defined for non-gnu-systems (BSD), further Problems?
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better context correction for 10 (IO,lO)
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Fixes for S.Koledin examples "GlS"
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Euro-currency-sign detection added
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better pitch estimation for proportional font (needs to be improved)
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make install DESTDIR= instead configure --prefix= (better?)
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use wchar_t by default, more simple code and -f works with nonLinuxOS
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line detection more robust against vertical glued chars (js)
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-f UTF8 added (usefull for xterm -u8), should be default?
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handle vertical glued boxes (ex: g over T)
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0.3.4
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some BSD adaptions (no WCHAR?), tell me if there are still problems
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use unicode in database (4-8 hex digits)
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new option: -p database_path/
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TILDE fixed, #, Æ, Å, etc. added (swedish,norwegian)
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layout analysis improved
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0.3.3
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database (-m 2) bug fixed and interactive mode (-m 130) added
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its not finished, but you can test it
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result should be ok for machine generated images (no scans)
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engine improved a bit
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0.3.2
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ocr-engine improved for screen fonts (thanks for examples)
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option -f [HTML,TeX,...] added
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0.3.1
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make install updated
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0.3.0 some parts of the code reviewed (most work done by Bruno Barberi Gnecco)
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tkispell patch from David Pinson (exec bug fixed)
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gnome frontend added (Dany De Bontrider)
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acute, grave, circumflex ... detection
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C++ parts rewritten into C, and much more (see REVIEW)
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0.2.7 lib-patch from Klaas Freitag inserted, engine improved
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option -n 1 detect only numbers, get threshold value by otsu.cc
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xxx.pnm.bz2 can be used on linux systems bzip2 installed
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0.2.6 pipes used on POSIX2-systems for easier use of jpg,gif,tiff,pnm.gz-files
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example: gocr text.jpg; gocr text.pnm.gz
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verbose output on stderr, text output on stdout,
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redirection of output possible (-e, -o, example: -e /dev/stdout)
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engine upgraded a bit (thx for the new sample files)
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gocr.tcl upgraded (save options, save text)
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DOS/WIN95-EXE created, download GOCREXE.ZIP (v0.2.5)
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0.2.5 program convert renamed to jconv
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you can choose stdin as input now, for using conversion tools
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example: djpeg -pnm -gray text.jpg | gocr -i -
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option "--help" added, some bugs removed
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amiga.h added for SAS/C under AmigaOS (suggested by Uffe Holst)
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line detection changed (faster?)
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importing gocr in your C++ application is easier now (see fkt pgm2asc)
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argument can be given instead of option -i (this is more natural)
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some reorganization of code (not finished)
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2000 downloads counted !!! Jun2000
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SourceForge.net used for gocr (project: jocr, other gocr exist there)
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bugs in dust removing, line detection and zoning fixed (rewritten)
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first version of tcl/tk-GUI, test it!
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rekursive function frame_nn() replaced by labyrint-algorithm (no extensiv stack used)
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gluing of broken chars added, removing glued serifs (on small fonts)
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new bugs added :;
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0.2.4a2 some details are added (better dust removing and char division)
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0.2.4 three char division (connected chars), dust removing
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0.2.3 add layout analysis (very slowly, try -m 4), engine modified
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better distance function, engine updated, database added for testing
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1000 downloads counted !!! May2000
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0.2.2 gocr_0_2.tgz expands into gocr_0_2 directory (thanks to zz99zz)
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engine upgraded a bit, some bugs fixed (umlaut, thin lines)
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short documentation added (ocr.tex)
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colored output (out30.bmp) for test/development-mode
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bug: read ASC-PBM and PCX (1 bit) fixed
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0.2.1 first official release on freshmeat.net March 2000
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0.2 line scanning added
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0.1 project started (not documented), autumn 1998 - summer 1999
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