Can you force ImageMagick to use PNG-8 alpha transparency?

问题

When I try to run a bunch of PNG-8 images with alpha transparency through Imagemagick, it converts them to PNG-32, increasing the file size a lot.

Is it possible to force Imagemagick to keep my image type as 8-bit PNG?

回答1:

You can do it like this:

convert test.png PNG8:test2.png

I've had varying luck with IM and PNG8, but this is the correct way to do it.

回答2:

I seem to get the best result using the following

convert src.png -colors 256 PNG8:dest.png

来源：https://stackoverflow.com/questions/1468221/can-you-force-imagemagick-to-use-png-8-alpha-transparency