1.73
- All lept_* functions have been rewritten to avoid path rewrites
for
output to temp files, which were introduced in 1.72.
- Naming changes (to avoid collisions):
#defines MALLOC --> LEPT_MALLOC, CALLOC --> LEPT_CALLOC, etc.
ByteBuffer --> L_ByteBuffer
- Added grayscale histogram functions that can be used to compare
images.
- Added functions to determine if an image region has horizontal
text lines.
- Added functions to compare photo regions of images to determine
if they're essentially the same.
- Added red-black tree utility functions to implement maps and
sets.
- The keys for maps and sets can be 64-bit entities (signed and
unsigned integers and doubles).
- Implemented hashsets and hashmaps, using 64 bit keys.
- Replaced the numaHash by l_dnaHash; removed numa2d
- Improved security of tiff and gif reading, to prevent memory
corruption
when reading bad data.
- Removed src files: bootnumgen.c
- Added src files: rbtree.c, rbtree.h, map.c, bootnumgen1.c,
bootnumgen2.c
- Added prog files: rbtreetest.c, maptest.c, settest.c,
hashtest.c,
recog_bootnum.c, percolatetest.c
- Added files for building using cmake (Egor Pugin)
1.72
- Better handling of 1 bpp colormap read/write with png so that
they are losseless.
- Fixed overflow bug in pixCorrelationBinary().
- Fixed orientation flags and handling of 16 bit RGB in tiff.
- Also new wrappers to TIFFClientOpen(), so we no longer go
through
the file descriptor for memory operations.
- Improvements in the dewarp functions.
- New box sequence smoothings.
- New antialiased painting through mask; previously it was only
implemented for connected components in a mask.
- Better error handling and debug output with jpeg2000 read/write.
- Implemented base64 encoding. This allows binary data to be
represented
as a C string that can be compiled. Used this in bmf utility.
- Implemented automatic code generation for deserialization from
compiled strings (stringcode.*)
- Regression tests write to leptonica subdir of in windows; in
unix it is optional. This avoids spamming the directory.
- Added new colorspace conversions (XYZ, LAB).
- New source files: encoding.c, bmfdata.h, stringcode.c,
stringcode.h,
bootnumgen.c.
- Removed source files: convolvelow.c, graymorphlow.c
- New programs: genfonts_reg, colorize_reg, texturefill_reg,
autogentest1, autogentest2.
- alltests_reg now has 66 tests.
operations, along with a description of the functions and some design methods.
A full set of affine transformations (translation, shear, rotation, scaling)
on images of all depths is included, with the exception that some of the
scaling methods do not work at all depths. There are also implementations of
binary morphology, grayscale morphology, convolution and rank order filters,
and applications such as jbig2 image processing and color quantization.
