Converting 8 bit PNG to 32- bit with alpha

问题:

I have an Image: PNG image data, 403 x 343, 8-bit colormap, non-interlaced. I want to convert this into Google Play Icon size: 32-bit with alpha.

How can I do it?

回答1:

Fixed it using https://pixlr.com/editor/. Just open and save the image with full quality.

回答2:

With imagemagick: convert <file> png32:<newfilename>.png

With Gimp: open, add alpha channel (Layer > Transparency > Add alpha channel), set RGB mode (Image > Mode > RGB) and export as png.