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6f168e4f80828e11e73c46cbec21e2a1029ccf25
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9 Commits

Author SHA1 Message Date
Frank Bossen
6f168e4f80 Add parameters to cjpeg to tune for different metrics 
-tune-psnr, -tune-ssim and -tune-hvs-psnr are added to cjpeg to control
the trellis quantization process and optimize output for PSNR, SSIM and
HVS-PSNR distortion metrics
 2014-03-25 11:48:30 +01:00
Frank Bossen
3e8afe7f94 Add option to control lambda parameter from command line 
-lambda1 and -lambda2 command line parameters are added to cjpeg to
control trellis quantization
 2014-03-24 20:51:46 +01:00
Frank Bossen
758ed27a05 Add option to use flat quantization table 
Set cinfo->use_flat_quant_tbl to TRUE to use flat quantization table or
-flat option in cjpeg
 2014-03-24 16:30:56 +01:00
Frank Bossen
d200b2c144 Initial implementation of trellis quantization 
A new pass type trellis_pass is added. It defines a pass where trellis
quantization is done in the quantize_trellis() function.
Trellis quantization can be enabled by setting use_moz_defaults to 2 or
by using the -trellis option in cjpeg
Note that trellis does currently not work with scan optimization. Scan
optimization is disabled when trellis is enabled.
 2014-03-23 21:06:01 +01:00
fbossen
724d558ae3 Fix issue #2 clarify default status of options 
With mozjpeg defaults, Huffman table optimisation and progressive
coding are enabled
 2014-02-20 18:31:25 -05:00
fbossen
fa9569fcec Add command line parameter to control scan optimisation 2014-02-14 17:19:56 -05:00
fbossen
8e876747c8 Update cjpeg usage 
Add -revert to the list of displayed options in cjpeg help message
 2014-02-11 12:30:13 -05:00
fbossen
52925cfff2 Add fast jpgcrush mode 
Add the fast mode of jpgcrush where:
- Huffman table optimisation is enabled
- Progressive coding mode is enabled
- New default scans are defined for progressive coding
 2014-02-11 11:09:37 -05:00
Josh Aas
72b66f9c77 Initial commit of libjpeg-turbo plus readme edits. 2014-01-13 18:28:20 -06:00