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Transparency in png format

Posted: 2010-09-01T10:21:13-07:00
by amirian
Any guidelines to solve this problem would be appreciated:
I want to save my converted image via IM to a 4(or 3) bit-depth png format supporting transparency, but I can't: it's bit depth increases to 32 even if I have just one or two colors in the image. Does IM support such a png? This is my final image:
Image

and I want it have the same format as this one(this is not generated by IM):
Image

Re: Transparency in png format

Posted: 2010-09-03T06:31:46-07:00
by amirian
No comments??!
If impossible in IM, then please introduce a light command line software to convert to 4-bit transparent png format

Re: Transparency in png format

Posted: 2010-09-03T14:49:50-07:00
by fmw42
best i can suggest is to check out other png tools listed at http://www.imagemagick.org/Usage/formats/#png_non-im

Re: Transparency in png format

Posted: 2010-09-04T01:47:51-07:00
by amirian
Thanks, I succeeded using pngquant