Commit Graph

3 Commits

Author SHA1 Message Date
Frank Bossen
b03b5797f4 Add optimization of quantization matrix
Optimizes quantization matrix by minimizing reconstruction error based
on quantized coefficients.
Feature is controlled by cinfo->trellis_q_opt; disabled by default.
2014-04-28 16:28:05 -04:00
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
Josh Aas
72b66f9c77 Initial commit of libjpeg-turbo plus readme edits. 2014-01-13 18:28:20 -06:00