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|
[search "->" to find people]
Dec 06 2003 -> Giulio Lunati added heuristic to find splitting points
in partial matching.
- minor changes in preproc.c
- added P_SPL[] and p_spl_comp() in symbol.c
- modified classify(), step 8 in symbol.c
- enabled partial matching (p_match=1 in clara.c)
March 25 2003 added additional cjvu information at char level,
suggested by -> Imre Simon.
Copied the development files to the net (20030318).
March 18 2003 -> John Wehle changed some barcode parameters and updated
obd.c:
1) Finished checksum support. A side effect is
that the c39 start / stop character (*) is no
longer included in the decoded barcode.
2) Finished c128 support.
3) Added interleaved 2 of 5 support.
4) Default to autodetecting the symbology.
5) Generate placeholders for missing widths
when converting the scanline.
February 26 2003 - Integrated -> John Wehle's decoder into Clara OCR.
To read a barcode, scan it (backgound must be white)
and try "clara -y res searchb=1 -b -f file.pbm",
where res is the resolution in dots per inch.
Obs. currently only one barcode per file is read.
Obs. use searchb=2 to display the pixels instead
of trying to decode.
Added -> John Wehle's c39.pbm sample to the tarball,
the command "clara -y 204 searchb=1 -b -f c39.pbm"
should produce "*THE QUICK BROWN*".
Applied -> John Wehle's patches.
Added NO_RINTF flag to Makefile. By now this is
default, but can be undefined on systems that
provide rintf().
Copied the development files to the net (20030226).
February 14 2003 - Fixed a bug at skel(), some skeletons were
truncated.
More fixes on PAGE_FATBITS display. The modes that
do require FSxFS now force this window size.
Replaced "indo-arabic" by "decimal" along the
source code.
February 13 2003 - Finished first operational implementation of
classifier 4.
Fixed the fatbits display, broken since
PAGE_FATBITS enlarged (see Dec 3 2002).
Added skeleton computation method #7.
February 10 2003 - Added classes.txt (hardcopy of "patterns (list)"
tab, generated when batch processing).
Fixed: "changed" flags were not being set on some
cases.
More variables can be set on command line (patterns=,
bf_auto=, see checkvar for full listing).
Copied the development files to the net (20030210).
February 3 2003 - Added build_internal_patterns().
Classifier 4 now uses the same structure than
the others (cf. Dec. 14 and the note on clara.c
on calling build_internal_patterns()).
-> Imre Simon announced the availability of
http://www.ime.usp.br/~is/atc/atc.djvu a
300-page Computer Science textbook. The text
frame was generated by claraocr.
January 29 2003 - Added pp_save and pp_only. Now it's possible to
invoke the program as a preprocessor only, using
-b and these two variables. The preprocessed image
will be saved as pgm, with "_pp" added to the
original filename.
Added variable report to inhibit the creation of
report.txt (use report=0 on the command line).
January 28 2003 - Copied the development files to the net (20030128).
January 27 2003 - Giulio Lunati announced a new classifier.
January 23 2003 - Dot-related fixes (thanks -> T. Ribbrock and
-> Berend Reitsma).
Added restrictors start_at and stop_at. See the
documentation of -f to known how to use them.
Re-scan all patterns (Edit menu) on by default.
January 21 2003 - Now -b implies -u (easy way to avoid a crash).
January 20 2003 - added djvu output format '-o d' (so the
text output can be inserted in a djvu document,
see http://www.djvuzone.org/ for details on
djvu). Oops.. iso to utf-8 post-filtering
is required. Thanks -> Imre Simon for suggesting
this feature, studying djvu details and performing
tests.
Disabled blockfinding by default. To enable use
dontblock=0 on the command line.
January 16 2003 - -> Mark F. Heiman reported successfull building
on OS X, but behaviour isn't ok (endianess problems?).
January 13 2003 - -> Thomas Ribbrock reported/commented a tutorial
problem.
January 8 2003 - Consolidated preprocessing support for image
compressors. By now this works as follows: load
an image, OCR it asking to "build the bookfont
automatically", ask "save replacing symbols"
(File menu). The tozip.pbm file is the
preprocessed image. It'll achieve better compression
rates than the original one.
Copied the development files to the net (20030108).
January 2 2002 - -> Berend Reitsma sent comments concerning
diacritics (added directly to the code).
December 17 2002 - -> Benjamin Wong sent patches (applied).
December 14 2002 - Added a new bitmap comparison method (#4), referred
as "shape" on the source code (see the function
bmpcmp_shape). It's partly based on -> Rodrigo
Readi's suggestions.
December 4 2002 - -> Adriano Nagelschmidt Rodrigues donated a 15"
monitor to the project.
December 3 2002 - Implemented/activated features suggested by
-> Rodrigo Readi: Buffered I/O became default to
avoid flickering (obs. this is experimental stuff,
use -u to switch off).
PAGE_FATBITS now displays areas larger than FSxFS. It
enlarges as needed to cover the entire plate. Special
display features (like "Show border") are restricted
to the top-left FSxFS rectangle, though.
Copied the development files to the net (20021203).
November 23 2002 - More suggestions by -> Rodrigo Readi. Added his
suggestions to the file Rodrigo.Readi.
November 9 2002 - -> Ed Snible reported fatal errors (UNCHECKED).
-> Rodrigo Readi sent various good suggestions (to
be worked on). He reported good results using fraktur.
November 4 2002 - -> Rodrigo Meza reported problems recognizing trained
characters (UNCHECKED).
September 28 2002 - -> Andy Miller reported problems on X-Win32
displays.
September 8 2002 - -> Eduardo Maan renamed selthresh.pl to selthresh
and wrote the man page selthresh.1.
July 23 2002 - Copied the development files to the net (20020723).
Fixed claraocr-devel list (subscriptions made between
approx. 20020522 and 20020723 may have silently
failed). Thanks -> Charles Davant.
July 22 2002 - Uploaded CF doubts to www.claraocr.org.
July 19 2002 - Added doubts counter to the web interface.
Fixed PAGE (doubts) initialization bug.
Fixed pattern typer initialization bug.
Set various regeneratio/changed flags along the code.
Images added to PATTERN (types).
July 17 2002 - Finished new web interface.
July 16 2002 - Started writing the new web interface.
Added registration/authentication.
July 11 2002 - Replaced "obs." by "remark:" along all files (thanks
-> Roy).
Added draw_thin flag (see redraw.c).
July 10 2002 - Fixed a manual typo (thanks -> Roy).
Perfect matching tests for grabbed images (thanks -> Roy),
fixed classify() bug ("direct" variable not being reset),
added dump_bm() to debug classify(), fixed computation
of skeleton limits for algorithms 3, 4, 5 and 6.
Diaeresis support a bit better now (thanks -> Werner Speer
and -> Kolja Brix).
July 8 2002 - -> Charles Davant fixed an alias problem reported by
-> Kolja Brix.
July 4 2002 - Added page (doubts) window.
First procedure for classification of doubts.
July 3 2002 - Implemented Abagar debug mode.
Diagnosed a local binarization problem (fragments that
disappear - search "dropped fragments" at pbm2cl.c).
Fixed references to "pp_thresh" and "gl_thresh" (now
h_thresh is referred).
July 2 2002 - Added horizontal disjunction criterion to cmpln()
(bad line ordering).
June 28 2002 - Tests using -> Werner Speer file.
Partial matching off by default.
May 22 2002 - Copied the development files to the net (20020522).
May 20 2002 - added dict_sel.
May 18 2002 - First dictionary interface.
May 16 2002 - First win32 binary, by -> Brian G.
May 14 2002 - Applied -> Franz Bakan patches and added to the tarball the
additional files required by OS/2.
Copied the development files to the net (20020514).
May 7 2002 - Fixed two initialization bugs reported by -> Thomas Klausner.
Added -pedantic to the makefile.
-> Franz Bakan reported that Clara OCR compiles and runs
on OS/2 with minor changes.
May 5 2002 - -> Brian G. reported that Clara OCR compiles cleanly on
win32 with cygwin. Next step is linking.
May 3 2002 - Released 0.9.9.
May 2 2002 - Fixed local binarizer bug (see the new variable "eaten" at
pbm2bm()).
Fixed a tutorial error.
Fixed -geometry (thanks -> "groggy").
All names cited by the CHANGELOG were acknowledged by the
main documentation (end of CREDITS session).
April 30 2002 - Fixed the hyperlink edit/n.
Switched off partial matching during binarization for
faster operation (see step_5()).
Copied the development files to the net (20020430).
Fixed presentation problem.
-> Brian G. is trying a win32 port.
April 29 2002 - Added a more informative message for some non-supported
file formats (thanks -> "groggy").
As the PAGE behaviour for graymaps is confusing, now it
enters three-state automatically after segmentation.
Dropped -A (use -allow_pres instead).
Removed heuristic 5 from skeleton auto-tune (see
the CSP array).
Developer's guide fixed.
April 27 2002 - Added clipping to draw_rb().
Added symbol display on HTML windows: use IMG SRC=symbol/n,
see an example at mk_pattern_action().
Added dynamic registration of GUI buttons. To see the
test button, use the command-line switch -pp_test.
Finished 'PATTERN (action)'.
April 27 2002 - Added "avoid-links" feature in segmentation step.
Changed reference to hqbin() in clara.c.
Reactivated Test button (only for my purposes :-).
Wrote pm_fl() in html.c (not used!).
Added "threshold factor" and "try avoid links"
parameters in Tune tab.
Improved balance code (now works fine);
other internal changes in preproc.c
Added 3 obs. to book.c [-> Giulio Lunati]
April 26 2002 - Dropped -C (use dmmode= instead).
Dropped -S (use RW= instead).
Initial window now tries to approach height/width
ratio 3/4.
Added SL status. Dropped -G (use TC=, SL=, etc).
Implemented 'PATTERN (action)' window.
April 25 2002 - Added status tskel_ready.
Now all menus (not only those on the menu bar) dismiss
when unfocused.
Added check to skel() to detect code that change skeleton
params without consisting them.
Added auto-tune checkbox to TUNE (skel).
Disabled auto classification of patterns by type.
Removed st_auto_tune status (using the old status
st_auto instead).
Removed skeleton auto-tune entry from TUNE tab (the
new checkbox and submit button at TUNE (skel) tab
do a much better work).
April 24 2002 - Applied -> Giulio's patch (interpolation and others).
Fixed skeleton bug: not calling consist_skel()
after some changes of skeleton parameters.
Changed skeleton quality coverage criterion, and
documented carefully skel_quality().
Fixed skeleton auto-tune bug: not calling pskel().
April 23 2002 - Fixed pp_thresh() (thanks -> Giulio Lunati).
Copied the development files to the net (20020423).
April 22 2002 - Finished updating the user's manual.
Updated preproc.c (thanks -> Giulio Lunati).
Added (naive) double resolution, interpolation
to come.
April 20 2002 - Double resolution tests.
April 16 2002 - Copied the development files to the net (20020416).
Added translation of long options and a command-line interface
to define internal variables (see checkvar() and
process_cl()).
April 15 2002 - Removed buttons "bold", "italic" and "test".
Finished fixing the tutorial.
Added balance checkbox to the tune tab.
fixed a thresholding bug (the code 20020409 was
unable to handle PBMs).
The link "nullify and remove" is back to the PATTERN
tab (so now it's possible to remove one pattern).
TUNE tab entries reorganized in to same sequence
of OCR steps.
The four binarization methods were collected into
one radio at the TUNE tab (manual global, histogram,
local and local strong).
"How many types" removed from TUNE tab (now the
array of types grows automatically when needed).
Fixed bugs related to the Debug menu (the PAGE
menu became broken and the Debug menu wasn't
working).
Reorganized various menus and changed some labels.
Constant MAX_MT now is 45.
Fixed segfault related to "show words" option.
April 9 2002 - Added compositions / /, / a, / o, / A, / O, " s (thanks
-> Jeroen Ruigrok).
Changed some hardcoded constants to try avoiding
partial matching mistakes (thanks -> Thomas Klausner).
Copied the development files to the net (20020402).
April 6 2002 - Applied -> Giulio Lunati's patch (renamed deskew.c to
preproc.c, added balance relative black, test
button, and code cleanup).
Removed deskewer name, as requested.
Added "Debug" menu.
Added "Show unaligned symbols" feature.
Moved "Show lines (geometrical)" to "Debug" menu.
April 2 2002 - Copied the development files to the net (20020402).
April 1 2002 - Added field "bs" to symbol structure to store the base
symbol of accents.
Support for double quotes enhanced, partially working.
Added macro trans()
March 30 2002 - Added lfa reset at rmvotes().
Partial matching restricted to symbol classification (mode
1 at classify()).
Fixed a bug on the local binarizer (training from
grayscale was not working).
Tested -> Giulio's code on a 24-bit padded display (works).
Fixed seed search code at pbm2bm(). Some letters were
being dropped by the local binarizer due to this bug.
Implemented auto-tune of skeleton parameters (global),
it's the function tune_skel_global().
Changed the semantics of -a: the st_auto_global status
instead of st_auto. Same for "auto tune skeleton
parameters" on the TUNE tab.
Integrated tune_skel_global() to the engine (see
prepare_patterns()) and dropped the old calls to
tune_skel().
Linked -> Giulio Lunati's histogram-based thresholder
with Clara OCR. It's used by default when converting
grayscale to black-and-white.
March 28 2002 - -> Giulio Lunati added support to sparse 24bpp displays. Such
displays have a depth of 24bpp, but pixel colors are padded
with an additional (unused) byte to provide 32-bit
alignment.
Added automatic conversion from PBM to PGM on loading,
basically to simplify the program at the expense of system
memory (now black-and-white images are internally handled
as 8bpp graymaps before segmentation).
Fixed a problem concerning partial matches (dashes
being recognized as a sequence of dots).
Diagnosed and fixed a re-training bug: every time a class
was re-trained, class data was lost. Thanks -> De Clarke
for reporting it.
One rule for validation of dots based on alignment was
commented out (see the function recog_validation()).
The usage of the term "lineart" was carefully reviewed
on the manuals.
Removed some test code that was causing problems to
spyhole().
March 26 2001 - Added code to handle double quotes (unfinished).
Added -o command-line switch and the ability of generate
text output (thanks -> De Clarke).
Now using rintf() instead of roundf() (thanks -> Thomas
Klausner).
Copied the development files to the net (20020326).
March 21 2002 - Scanned Anchieta's Grammar, p. 48-117
March 18 2002 - Fixed a bug at classify().
Copied the development files to the net (20020318).
Scanned Ancheta's Grammar, p. 1-48.
March 16 2002 - Finished linking -> Giulio's deskewer.
Changed the copyright notice displayed by the GUI.
Added the modified version of selthresh.pl (by -> Tyler
Akins) to the tarball.
Now partial matching can be called by the OCR engine.
Robustified cmpln().
March 11 2002 - Fixed some partial matching bugs.
Copied the development files to the net (20020311).
March 9 2002 - Partial matching now works.
March 8 2002 - Started writing code to perform partial matching (to solve
horizontal links).
March 6 2002 - Fixed a segmentation bug, at new_cl() (thanks -> Giulio Lunati).
March 4 2002 - Trying to link -> Giulio's deskewer with Clara OCR.
February 28 2002 - -> Giulio Lunati contributed some filters.
February 27 2002 - -> Tyler Akins reported various problems.
February 13 2002 - Added auto-classify, as suggested some time ago by
-> Adriano Nagelschmidt Rodrigues. Added "Auto classify" entry
to the Edit menu.
Copied the development files to the net (20020213).
February 11 2002 - Changed the directory scanning code. Now the PAGE (list)
tab sorts the filenames as numbers (e.g. "2.pgm" before
"10.pgm").
February 9 2002 - Applied -> Giulio Lunati's patch to handle apostrophe,
colon, semicolon and multichar alignment.
February 7 2002 - Added checkboxes "use local binarizer" and "strong mode"
to the TUNE tab.
Copied the development files to the net (20020207).
February 6 2002 - Local weak threshold tests.
February 5 2002 - Added relaxed mode to spyhole().
February 4 2002 - The local binarizer is now integrated to the main OCR
engine in "weak" and "strong" fashions.
Added operation mode 4 to spyhole(), it's a faster
version of mode 0.
Local binarizer measurements and bugfixes.
February 2 2002 - Wrote find_thing() to integrate the local binarizer to
the OCR engine.
Prepared new_cl() to accept fat bitmaps from find_thing().
January 30 2002 - Replaced the screenshot 7.
Copied the development files to the net (20020130).
January 29 2002 - Added more entries to the glossary.
January 28 2002 - Added "expected threshold" parameter to spyhole(). Now
the "best" threshold is first searched around the expected
threshold.
Added to spyhole() an heuristic to compute an alternative,
larger threshold (called "next"), based on detection of
merging of fragments. It's a tentative to solve segmentation
problems (broken symbols). The pixels added by this larger
threshold are displayed gray by the spyhole.
Added relaxed mode to border_path().
Documented carefully the detection of merging of fragments
(referred as "spare pixels" by the source code), see the
large comment before the main loop of spyhole().
January 26 2002 - Destroyed the binding between pattern and symbol ID
(field "e" of structure pdesc, it's still there but
out of use).
Added the concept of pattern transliteration submission
(REV_PATT and review_patt()), because this cannot be
done anymore through symbol transliteration submission.
Changed update_pattern() to accept a bitmap submission,
besides symbol submissions.
Added the ability to include a pattern from the bitmap
stored by the spyhole buffer (just press the key
corresponding to the symbol transliteration while the
spyhole is active).
Started writing a small glossary specific to Clara OCR,
Added initial support to mkdoc.pl generate the
glossary.
January 24 2002 - Received "Que sais-je? - La Terminologie. Noms et
Notions" (Alain Rey), sent by -> Daniel Merigoux (Clara
OCR is strongly related to dictionaries and
vocabularies).
-> Ron Young reported more mirror problems.
January 23 2002 - Copied the development files to the net (20020123).
January 22 2002 - Fixed minor bugs at spyhole() and finished a first
strategy for choosing per-symbol thresholds.
New screenshot spyhole.jpeg added.
January 21 2002 - Added thresholding loop to spyhole().
January 19 2002 - More documentation for border_path(). Adapted border_path()
to be used to span connected components.
Now spyhole() uses border_path() to select the connected
component close to the pointer.
January 18 2002 - Added "What is PBM/PGM/PPM/PNM?" to the FAQ.
Splitted the service avoid() into avoid_geo() and
avoid_context(). Moved the context avoidance tests from
bmpcmp_skel() to classify_symbol() (in fact, this is a
bugfix).
More documentation for bmpcmp_skel() and classify().
bmpcmp_skel() now supports the comparison of any
given bitmap with a given pattern (feature added to
implement the new binarizer).
Changed the service classify() to support patterns
and any bitmap. Dropped compare_patterns().
January 15 2002 - First implementation of spyhole().
January 14 2002 - Re-scanned CF pages 49-110 to work on a new version
of the case study http://www.claraocr.org/cf-test/
Copied the development files to the net (20020115).
December 26 2001 - Finished attaching to each menu item its availability
conditions.
December 24 2001 - Implemented availability tests, short help and
diagnostics for menu items.
-> Charles Davant fixed the mirrors.
December 21 2001 - Implemented the unavailable state for menu items.
-> Imre Simon donated 200 CD-R medias.
-> Erich Mueller reported mirror problems.
December 15 2001 - Detection of extremities tests. Good results for
sans-serif.
Copied the development files to the net (2001217).
December 14 2001 - Finished detection of extremities. Detached is_extr()
from dx().
December 13 2001 - Returned the new motherboard (failure on keyboard
detection).
December 10 2001 - Copied the development files to the net (2001210).
December 7 2001 - Purchased a new motherboard and Duron 1GHz CPU to replace
an old, damaged board.
-> Sergei Andrievskii provided some explanations about Russian
and Ukrainian Cyrillic.
December 6 2001 - Implemented the service dx() and the circ* stuff.
Separated add-closure() from pixel_mlist().
Added "detect extremities" menu option (PAGE_FATBITS).
December 3 2001 - Copied the development files to the net (2001203).
November 30 2001 - Implemented manager.c test mode (no operator, have_oper==0).
November 29 2001 - Wrote and tested burn_cd().
Added a very crude sound interface to manager.c.
November 28 2001 - bandwidth tests. It's a hard problem to make the scanner
station apt to scan and write CDs at the same time.
November 27 2001 - Scanning tests using manager.c. Finished preparing the
hardware of the scanner station.
November 26 2001 - Fixed the regeneration of PAGE (symbol) to follow the current
symbol when arrow keys are used.
Fixed a small webclip-related regeneration problem.
Tested carefully the full PGM cycle and zones support.
Small documentation updates to reflect the new features.
Copied the development files to the net (20011126).
Began preparing the scanner station manager (manager.c).
November 24 2001 - Finished the multiple zones stuff.
November 23 2001 - Added "Deskewing" OCR step (currently empty).
Changed position of "detect blocks" OCR step. By now using it
to activate the CF PGM blockfind.
Added "Segmentation" OCR step (by now, it starts pbm2bm reading
from the PGM buffer).
Added PBM support to pgmload(). Now the PBM loader pbm2bm()
will be used only to perform segmentation, and the same handling
applies to both PGM and PBM files.
November 22 2001 - Added zfgetc.
Added to the z* internal I/O API the ability of
thresholding and "reading" the PGM buffer as if it were
a PBM file.
November 21 2001 - Changed draw_zone to support non-rectangular zones.
Added zfread and zfwrite in order to prepare the z* internal
I/O API to be a more featured I/O selector to support file,
compressed file, internal buffer and TCP I/O.
November 20 2001 - Replaced 'button 2' with 'button 3' along the source code.
Added handler for mouse button 2. By now, it toggles the
max/min view on some windows.
Disabled show_hint on waiting_key state.
Implemented "Instant thresholding" feature.
Added the geometric service inside().
November 19 2001 - Finished reimplementing the CF blockfinder (by now, it can
be requested using "C-x p" after loading a PGM file).
Changed search_barcode to use the service clusterize().
Added initial support for multiple zones.
Copied the development files to the net (20011119).
Conformed loadpgm() to the partial execution model.
November 17 2001 - Reimplemented partially the old CF blockfinder.
Wrote the service clusterize(), to be used by the new
blockfinder and also by the barcode searcher.
November 16 2001 - Now pgmblock.c is linked with Clara OCR.
Implemented PGM visualization.
Now any mouse buttonpress clears the message line.
November 15 2001 - Scanned the pages 1-32 from the Candido de Figueiredo
Dictionary using the HR5 scanner and SANE 1.0.4
(600 dpi).
Fixed floating comparison problems due to inexact binary
representation at selthresh.pl (see the warning #6 on
the script).
November 14 2001 - Added "Show pixel" and "Show pattern type" to the "View"
menu.
Tests using the HR5 scanner. The bundled controller
(Domex) didn't work for us (defining SANE_DEBUG_UMAX=128,
scanimage stops on the message "waiting scanner"). Using
a 2940 instead.
November 13 2001 - Fixed background redraw on the junction PAGE/PAGE_OUTPUT.
Added mode "PAGE only" (see menu "Options"). When active,
the windows "PAGE (output)" and "PAGE (symbol)" become
hidden (useful when you need to visualize a larger portion
of the scanned image).
Fixed a bug on the computation of the bar medium skew.
November 12 2001 - Wrote search_barcode.
Added "Search barcode" to the "Edit" menu.
Enhanced closure_at (added the parameter u).
Implemented the laserbeam.
Changed the behaviour of button ZOOM at tab PAGE (now
it'll zomm the PAGE window almost always).
Copied the development files to the net (20011112).
November 10 2001 - Fixed a symbol selection problem at PAGE window:
those black margins on scanned documents (if any) act as
a gigantic symbol that contains almost any pixel. As the
symbol selection was based only on checking if the pixel
is inside the bounding box, the frames were selected
instead of the desired symbol (reported by -> Harold van
Oostrom).
Added isbar() service.
Fixed menu placement problem (the status line was being
drawn over the PAGE_FATBITS context menu).
November 9 2001 - Enhanced closure_at (no more simple bounding box
inclusion, bit state is also tested).
Various tests of straight borderlines detection using
skewed barcodes.
November 8 2001 - Finished segment extension at closure_border_slines().
Finished pixel extension at closure_border_slines().
Now the window PAGE_FATBITS displays on the message
line the closure-relative pixel coordinates, its
parameter (correlation or distance to the interpolated
line) and slope (after requesting "search straight lines").
November 7 2001 - Finished correlation code at closure_border_slines().
Splitted "Search straight lines on border" into options
"linear" (based on linear distances) and "quadratic"
(based on correlation).
November 6 2001 - Fixed display bug (PAGE_FATBITS scrolling).
Added "Centralize" and "Search straight lines on border"
to the PAGE_FATBITS context menu.
Began writing closure_border_slines().
The pbm2cl.c code was reviewed to avoid allocating too
much memory on dark pages, or pages with large images. On
some tests, the new code allocates 6 times less memory
and runs 50% faster.
November 5 2001 - Added all three contributed specfiles to the
distribution tarball (not a very good idea, but
it's the only thing I can do by now). See the
file README.RPM for details.
fixed a small regeneration bug (TUNE_PATTERN
window).
Copied the development files to the net (20011105).
November 3 2001 - Finished border_path().
3-bit optimization (see border_path()).
November 1 2001 - A service to compute a border path is available
(see border_path()).
New context menu: PAGE_FATBITS options (pops up
when the mouse button 2 is pressed on the
PAGE_FATBITS window).
Added "See in fatbits" item to PAGE options menu.
Added regeneration control to PAGE_FATBITS in order
to make easier to implement visualization of
pixel-level heuristics.
Added "the flea", a visualization feature. If a
"flea path" is defined and the fun code is 3, an
'x' will be drawn by the interface walking along
the flea path.
October 30 2001 - Began implementation of barcode detection.
October 29 2001 - -> R P Herrold contributed a spec file for RH 7.2.
October 27 2001 - More compression tests. Tried to adapt tic98.
Copied the development files to the net (20011026).
October 26 2001 - Tested various remappings to try to achieve better PGM
compression rates (code available at pgmblock.c). Beats
gzip but not bzip2.
October 24 2001 - Dumper bug fixed (reported by -> Stuart Yeates).
Crash when allocating large buffers using alloca (reported
by -> Stuart Yeates). Fixed, now using malloc instead.
Added checkings to review_tr() to refuse entering
symbols too large as patterns.
Added the answer to -> Ho Chak Hung to the Developer's Guide.
October 23 2001 - Crash on doubleclicking an anchor at PAGE_LIST (fixed).
Fixed a HTML parse problem ('>' as part of the value,
reported by -> Stuart Yeates).
October 22 2001 - Applied -> Harold van Oostrom's patch to initialize
the grid separation and avoid crashing on some
unexpected user actions. -> Harold van Oostrom also
contributed a spec file for RH and SuSE.
October 20 2001 - Added "test" target to the Makefile.
Added sselect(), fselect() and bselect(). These are required
to implement an auto-test feature. A prototype
is already available (try "make test").
Fixed a display bug when filling text input fields.
Release 0.9.8.
October 18 2001 - Copied the development files to the net (20011018).
Fixed an i64 bug.
October 17 2001 - Fixed a bug at recog_validation() (reported by
-> Stuart Yeates).
Fixed a bug at event.c (zoom- now correctly
repositionates the page).
October 16 2001 - Skeleton code became (more) 20% faster due to
optimizations at skel() and cb_border() (the W and H
parameters, and the i64 optimization flag, used
used there to handle 8 pixels at a time when converting
to 8bpp).
Added BIG_ENDIAN compilation flag (see clara.c), however
this is a work in progress.
October 15 2001 - Changed BC to MBB along the manual.
Skeleton code became 20% faster due to optimizations at
bmcmp_skel().
October 12 2001 - Gave up using the Brazilian Constitution (BC) files as
example. Due to the small clearance, it's hard to obtain
good results (a larger resolution should solve the
problems). Now trying Manuel Bernardes Branco
Dictionary (MBB).
Added a new strategy to selthresh.pl (see the variables
'clean' and 'small').
October 8 2001 - Finished "A first OCR Project".
copied the development files to the net (20011008).
October 6 2001 - -> Romeu's RPMs added to the download page.
Fixed a pattern comparison bug.
Optimized memory copies at bmpcmp_skel.
October 5 2001 - Added ab_mem and test_ab_mem.
Added switches -l and -y to selthresh.pl.
Added -T command-line switch.
Robustified selthresh.pl.
October 4 2001 - Purchased a Genius HR5 scanner. This scanner is supported
by the SANE UMAX backend.
October 3 2001 - -> Romeu Mantovani Jr contributed a clara.spec file (to
produce RPMs).
October 2 2001 - Fixed a problem at mk_page_output, reported by -> Laurent-jan.
October 1 2001 - Computed the thresholds for "Exclamations" (Therese of Avila)
using selthresh.pl.
Began reviewing the documentation to release 0.9.8.
September 28 2001 - copied the development files to the net (20010928).
September 27 2001 - Tests using -> Emile's binarizer.
September 26 2001 - Uploaded the new results for the Candido de Figueiredo
Dictionary.
Various optimizations at bmpcmp_pd.
September 25 2001 - Fixed bug at cml.c (the release 20010924 is unable to
read dumps).
Adopted per-classifier minimum scores.
New feature: "re-scan all paterns" ("Edit" menu).
Tests using the pixel distance classifier to handle
symbols not classified using skeletons (good results,
but slow).
September 24 2001 - copied the development files to the net (20010924).
New feature: "Show line (geometrical)" ("View" menu).
New feature: "Display boxes instead of symbols"
("Options" menu).
As the "View" menu became too large, we've moved some
entries to the "Options" menu.
September 21 2001 - word alignment tests robustified.
September 20 2001 - Tested -> Emile Snider deskewer.
Added the pattern bitmaps to the Pattern (types)
tab (first step to create a manual baseline adjusting
tool).
Added (horizontal) support to CELLSPACING attribute
of TABLE elements.
September 19 2001 - New feature: "set pattern type" (Edit menu).
Fixed some renderization problems when
dismissing menus.
Changed the structure ptdesc.
September 18 2001 - Four buttons became read-only (alphabet, pattern
type, bold and italic).
The service enter_wait now supports mode 4 to
read a string.
September 17 2001 - Fixed the web interface. The section "how to
use the web interface" became more detailed
(thanks -> Erich Mueller).
Skeleton parameters are global again, but it's
still possible to use the per-pattern behaviour
(see the PATT_SKEL compilation macro).
September 15 2001 - Case study based on the recent tests available
at http://www.claraocr.org/cf-test/
copied the development files to the net (20010915).
September 10-15 2001 - Tests using Candido de Figueiredo Dictionary,
4th edition. Various small fixes or
adjustments: pgmblock improved, display
the type 0 absent symbols, avoidance of common
false positives (the classification now must be
performed at least two times), alignment
problems diagnosed, etc.
September 8 2001 - Fixed: segfaults caused by changing properties of
untransliterated symbols (reported by -> Erich Mueller).
copied the development files to the net (20010903).
September 7 2001 - Added "search unexpected mismatches" feature to
prepare_patterns and to the Options menu. This
is a tool to detect cases where the behaviour
of the classificator is bad.
Fixed a classificator bug. This bug
was producing occasional false positives.
September 6 2001 - -> Bruno Barbieri Gnecco will adapt pgmblock to
be used through libgocr. This is a first tentative
to make Clara OCR compatable with libgocr.
September 5 2001 - pgmblock, a simple text block locator
for PGM files, is working.
September 4 2001 - Added -a command line option.
selthresh.pl, a simple script for
selecting the best threshold when converting PGM
to PBM, is working.
September 3 2001 - -> Terran Melconian reported a bug on the Makefile
and contributed a bugfix.
copied the development files to the net (20010903).
August 31 2001 - Added new skeleton heuristic (#6), based on
removing the border until remain only isolated
pixels.
August 30 2001 - Now it's possible to inhibit the usage of a
given classifier for some letters through the
pattern types form.
The reset service became partially operational.
Added block separation heuristic based on the
detection of vertical separation lines.
Fixed bad behaviour of from_asc when the
string field to read is absent.
August 28 2001 - -> Erich Mueller reported geometry problems on dumps.
August 27 2001 - Added new classifier, based on pixel distances.
August 24 2001 - Changed 'setmode' to 'setview' (thanks -> Bruce Momjian).
Tests using FreeBSD.
August 22 2001 - Finished pattern types form.
August 15 2001 - Changed geometry of "tune (skel)" window.
August 14 2001 - Added distance-based skeleton heuristic (#5).
Better version of skel_qualitu, based on distance from
the pixel to the border.
Skeleton parameters now are per-pattern.
August 13 2001 - Tested -> Adriano's bitmap.
August 10 2001 - First version of skel_quality, based on distance from
the pixel to the skeleton.
August 8 2001 - Service compare_patterns finished.
Partially fixed the behaviour of "display comparisons".
August 7 2001 - Began implementation of skeleton auto-tune.
Fixed a bug in bmpcmp_skel.
August 4 2001 - Manual adjustment of pattern types now works.
August 3 2001 - Started reworking pattern types.
August 2 2001 - -> Nathalie Vielmas told us about blind people needs.
July 26 2001 - -> Tim McNerney told us about the NIST OCR.
July 18 2001 - Added service dump_cb.
Added detection and handling of C-x prefix.
July 16 2001 - Release 0.9.7 (first release announced at large).
July 4 2001 - Release 0.9.6.
June 22 2001 - Release 0.9.5.
** historic - recovered from my agenda **
April 2000 - Version 0.9.c available on the web.
November 11-12 1999 - Showed it to various friends.
September 19 1999 - First version of the Xlib interface.
September 18 1999 - Named it "clara".
February 15 1999 - Tests trying to write a web interface, running
as a CGI.
December 18 1998 - Tests trying to write an interface based on GTK.
November 9 1998 - First brute force tests, using manually-built
fonts.
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