Different lambda values may be used for each frequency in DCT domain.
The weighting table is currently not configurable but can be
enabled/disabled with cinfo-> use_lambda_weight_tbl
-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
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.
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
