Image compression software-imagealpha batch Processing

Imagealpha reduces the image quality by reducing the number of color bits, which is lossy compression.
The general picture is 32-bit color, reduced to 16-bit or 8-bit by using this tool, the picture is reduced by nearly 10 times times the size
Personal advice to tighten the 16-bit, then shrink the words, the size is not too much change, but the picture quality greatly reduced
The use of the method is very simple, open the software will know, but only a single-sheet processing
Drag in the picture to the window-drag the lower left corner slider to 16,-Save As.

cd/application/imagealpha.app/contents/resources/
Then execute the command line, the basic format is as follows:
./pngquant--ext=.png ~/desktop/image/*.png

It means to compress all PNG files in the ~/desktop/image directory to 16 bits and overwrite

Image compression software-imagealpha batch Processing