[SOLVED] fully specifying the png compression method
Posted: 2012-10-05T10:55:46-07:00
If I understand correctly, the png compression system is defined by 3 numbers.
For example, here is some pngcrush output:Now, "fm 0 zl 9" corresponds to "-quality 90" (they are in the opposite order) in ImageMagick.
Is there a way of setting zs as well?
For example, here is some pngcrush output:
Code: Select all
Total length of data found in IDAT chunks = 348784
unknown chunk handling done.
IDAT length with method 1 (fm 0 zl 4 zs 0) = 223599
IDAT length with method 2 (fm 1 zl 4 zs 0) = 248123
IDAT length with method 3 (fm 5 zl 4 zs 1) = 385096
IDAT length with method 4 (fm 0 zl 9 zs 1) = 323957
IDAT length with method 7 (fm 0 zl 9 zs 0) = 212899
Best pngcrush method = 7 (fm 0 zl 9 zs 0) for temp.png
Is there a way of setting zs as well?