QccPack / News: Recent posts

Minor updates for gcc 11 and a new script

SPIHT and SPECK modules were merged into the main distribution

Main distribution: minor changes

Main distribution - minor additions to QccFile routines

Main distribution - better uniform quantizers for sqencode, added QccFileRewind()

Main distribution - Added reversible KLT, KLT+3D-TCE coder for three-dimensional data, lossless 3D-TCE coder for three-dimensional data, and lossless KLT+3D-TCE coder for three-dimensional data.

QccPack provides an open-source collection of library routines and utility programs for quantization, compression, and coding of data.

Main distribution - added timer routines, vector angle measures

Main distribution - added the DCT-TCE image coder

Main distribution - module libQccPackHYP has been added for
hyperspectral image compression

Check out Suhas Desai's article on using QccPack and Python for image processing in the latest issue (July 2007) of Linux Journal, http://www.linuxjournal.com/article/9692 --- including a prominent mention on the magazine cover, http://www.linuxjournal.com/issue/159 !!

Main distribution - minor bug fixes

QccPackSPIHT - minor bug fix

QccPackSPECK - no changes

Main distribution - integer-valued wavelet transforms added

QccPackSPIHT - no changes

QccPackSPECK - no changes

Main distribution - minor bug fixes

QccPackSPIHT - no changes

QccPackSPECK - no changes

Main distribution - documentation for QccPackIMG module

QccPackSPIHT - asymmetric-packet tree added

QccPackSPECK - minor bug fix

Main distribution - Added motion estimation/compensation using regular triangle meshes, added the 3D-WDR coder for three-dimensional data, and fixed several bugs.

QccPackSPIHT - minor bug fixes

QccPackSPECK - no changes

Main distribution - Added the spatial-block video coder and exponential-Golomb entropy coding.

QccPackSPIHT - no changes

QccPackSPECK - minor bug fix

Main distribution - Routines added for: motion estimation and compensation with subpixel accuracy; CRC codes; hard and soft Viterbi decoding; bitstream fifo

QccPackSPIHT - minor bug fixes

QccPackSPECK - no changes

Main distribution - The TCE algorithm (Tian and Hemami 2004) for image coding, Golomb coding for a lossless entropy coding, the 3D-BISK coder (Rucker and Fowler 2004) for three-dimensional data with arbitrary shape, and the RWMH video-coding algorithm (Cui, Wang, Fowler 2003) have been added.

QccPackSPIHT - an alternative interface to 3D-SPIHT was added

QccPackSPECK - the 3D-SPECK coder was added

Main distribution - The standard module QccPackVID has been added. In this module is the RDWT-block coder (Park and Kim 2000) for image-sequence coding.

QccPackSPIHT - An alternative interface to SPIHT encoding and decoding that permits use of an external DWT and inverse DWT was added.

QccPackSPECK - Minor user-transparent changes.

Main distribution - The 3D tarp coder (Wang, Rucker, Fowler 2003) for three-dimensional data has been added, and a few minor bugs have been fixed.

QccPackSPIHT - A few minor bugs have been fixed.

QccPackSPECK - Initial module creation.

Main distribution - added support for 3D volumes and image cubes

QccPackSPIHT - added 3D-SPIHT algorithm for coding 3D volumes

Main distribution - added BISK image coder and minor bug fixes

QccPackSPIHT - minor bug fix

Main distribution - addition of subsampling-pattern parameter to all DWT routines to enhance interoperability with RDWT routines; tarp now uses fixed-point arithmetic for faster operation; image reading/writing now tries to guess file type

QccPackSPIHT - slight improvement to shape-adaptive coding

Main distribution - addition of tarp-filter algorithm for image coding, nonadaptive arithmetic coding, more general phase selection for DWT routines

QccPackSPIHT - optional rate-distortion profile output added to QccSPIHTEncode()

Main distribution --- adaptive Golomb coding and the Wavelet Difference Reduction (WDR) image coder added

QccPackSPIHT --- no changes