changelog

Datamatrix二维码库和测试程序,运行于linux,仔细研究可以很容易转化成VC程序,有这就没必要化钱买个控件了,本人libdmtx-0.3版本转化过,的确可行,现在把找到该版本的libdmtx

Changes for libdmtx
-----------------------------------------------------------------

version 0.6.0 [November 2008]
  dmtxread now scans all major image formats [Olivier]
  New encoding/decoding Ruby wrapper [Romain]
  Reduced memory footprint
  Will scan multiple barcodes per image
  Various platform-specific improvements
  Initial work preparing for custom pixel packing in future
  Begin static analysis cleanup with splint
  New --disable-dmtxread and --disable-dmtxwrite [Romain]
  Ability to specify max/min expected barcode sizes
  New edge neighbor tracking (Hough + 2 way edge cache)
  Info cache to track scan progress and avoid rescanning pixels
  Major reduction in floating point operations
  New informative return codes (found, not found, error)
  Read input from STDIN
  Diagnostic images display trail left by scanning logic
  Option to write output to STDOUT [Olivier]
  PHP wrapper now compiles with recent libdmtx
  Dedicated README.xxx instructions for specific platforms

version 0.5.2 [September 2008]
  Move SetRangeLimit and SetScanRegion into library
  Replace DMTXUTIL_SUCCESS/ERROR with DMTX_SUCCESS/FAILURE
  Add edge threshold filtering
  Add encoding support for 144x144 barcodes
  Fixed encoding case when message starts with two digits
  Fixed bug in range limit option
  Add dynamic image shrinking (pixel skipping)
  Add step-by-step diagnostic image dump (debug build)
  Fixed bug in minimum scan gap setting
  Removed y-flip from internal pixel storage
  Added strict border tests to eliminate false positives
  Added squareness deviation filter
  Implement simplified Hough transform for locating first edge
  Several behind-the-scenes performance enhancements
  Python wrapper update; 15x faster (thanks Jonathan!)
  New PHP wrapper code added
  Various improvements when building for OS X and FreeBSD

version 0.5.1 [July 2008]
  Fixed Extended ASCII encoding bug
  Fixed error correction bug related to multiple interleaved blocks
  Added timeout condition for region detection
  Allow partial and complete disabling of error correction
  Replaced DmtxPixel struct with DmtxRgb for safe pixel copies
  Tighter integration with libfec
  Conditional build logic for libtiff
  Added placeholder for new utility, dmtxquery
  Added unit test program for testing libdmtx internals
  Include local copies of getopt1.c, getopt.c, and getopt.h
  Various things to help compiling in MS VC++
  Lots of holes filled in comments (Doxygen)
  Fixed experimental Data Mosaic decoding
  New Cocoa/iPhone wrapper (thanks Stefan!)

version 0.5 [April 2008]
  Error correction using libfec (thanks Florian!)
  Rework encoding and decoding API for consistency and intuitiveness
  Handle region detection and region decoding as separate tasks
  Pass found regions back to calling app before attempting decode
  Image mask approach (for performance and multi-barcode scans)
  Fix TestForEndOfSymbolEdifact() to handle special cases correctly
  Roll scan pattern into core library (inward breadth-first cross)
  Replace dmtxScanLine() with dmtxScanPixel()
  Implement 4-direction weighted module decisions (eliminates thresholds)
  Add ability to scan portion of image
  Add --diagnose option that dumps image with embedded scan infomation
  Added Z rotation angle (in degrees) to verbose output
  Move ASCII and codeword output to separate --preview option
  Added -R option for setting image print resolution in dpi (PNG only)
  Remove gltest and simpletest from default build target
  Update Subversion to be keyword friendly ($Id$)
  Updated documentation to reflect API and option changes

version 0.4 [December 2007]
  Remove arbitrary sz scaling (100.0) since it doesn't matter anyway
  Fix 4 bottom-right modules in sizes where they are not used (thanks Matthias R.!)
  Replace callback references with preprocessor macros
  Implement remaining encodation schemes for encoding (X12, Base 256, etc...)
  Implement remaining encodation schemes for decoding (X12, Base 256, etc...)
  Implement --auto-best option for best possible encoding efficiency
  Implement multi-region symbols
  Read and write rectangle barcodes
  Use GNU autotools (autoconf, automake, libtool)
  New region detection overhaul
  Include initial version of Python bindings from pydmtx project (thanks Dan!)
  Add decoding functionality through Python
  Add marathon images to project (thanks [e-mail]!)
  Fix dmtxread crash when same barcode is found more than 16 times
  Verbose messages describing traits of detected barcodes
  --codewords option to print codewords instead of decoded message
  --newline option to insert newline character at end of output
  Additional output formats (PNG, ASCII, codewords)
  'make test' executes regression tests for encodation

version 0.3 [October 2006]
  Several high-level changes: build process, naming consistency, file layout
  Added new automatic style checks in script directory ("make style")
  Implemented remaining encodation schemes for decode (X12, Base 256, etc...)
  Fixed instability/regressions that were introduced in v0.2 release
  Color sampling now averaged from multiple pixel locations
  Size calibration accuracy improved with new approach
  dmtxread: increased default scanline count, added multi-page TIFF format
  dmtxwrite: bug fixes, implemented -o option
  Improved documentation: deps listed in INSTALL, new man page for dmtxwrite

version 0.2 [June 2006]
  Cleaned up program structure surrounding decoding process
  Improved API for real-world use (no longer just dumping results to STDOUT)
  Added "dmtxread" command line utility
  Added "dmtxwrite" command line utility
  Implemented Reed-Solomon error detection
  Created "simpletest.c" for full circle processing test
  Now using libpng(3) in library to read Data Matrix images
  Improved documentation (somewhat)

version 0.1 [April 2006]
  Initial release