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Andrew 2024-04-14 14:05:29 +12:00 committed by andrews05
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MANUAL.txt
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@ -1,4 +1,4 @@
oxipng 9.0.0 oxipng 9.1.0
Losslessly improve compression of PNG files Losslessly improve compression of PNG files
Usage: oxipng [OPTIONS] <files>... Usage: oxipng [OPTIONS] <files>...
@ -64,8 +64,14 @@ Options:
Note that 'bKGD', 'sBIT' and 'hIST' will be forcibly stripped if the color type or bit Note that 'bKGD', 'sBIT' and 'hIST' will be forcibly stripped if the color type or bit
depth is changed, regardless of any options set. depth is changed, regardless of any options set.
The default when --strip is not passed is to keep all metadata.
--keep <list> --keep <list>
Strip all metadata except in the comma-separated list Strip all metadata chunks except those in the comma-separated list. The special value
'display' includes chunks that affect the image appearance, equivalent to '--strip safe'.
E.g. '--keep eXIf,display' will strip chunks, keeping only eXIf and those that affect the
image appearance.
-a, --alpha -a, --alpha
Perform additional optimization on images with an alpha channel, by altering the color Perform additional optimization on images with an alpha channel, by altering the color
@ -110,6 +116,7 @@ Options:
2 => Up 2 => Up
3 => Average 3 => Average
4 => Paeth 4 => Paeth
Heuristic strategies (try to find the best delta filter for each line) Heuristic strategies (try to find the best delta filter for each line)
5 => MinSum Minimum sum of absolute differences 5 => MinSum Minimum sum of absolute differences
6 => Entropy Highest Shannon entropy 6 => Entropy Highest Shannon entropy