In my application I need to resize and make the quality on PNG files poorer.
In full size the PNGs are 3100x4400px using 2,20MB disk space.
When running the fo
Help page says, that -quality
option used with PNG sets the compression level for zlib, where (roughly) 0 is the worst compression, 100 - is the best (default is 75). So try to set -quality
to 100 or even remove the option.
Another method is to specify PNG:compression-level=N
, PNG:compression-strategy=N
and PNG:compression-filter=N
to achieve even better results.
http://www.imagemagick.org/script/command-line-options.php#quality