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What? I thought zip and png use the same compression algorithm.

• pornel 12y ago
  They do indeed. If you're seeing BMP+ZIP being smaller than PNG it only means your PNG encoder is poor. This can be easily fixed with a PNG optimizer like Zopfli, AdvPNG or OptiPNG.
  • Hello71 12y ago
    zopfli: not a png optimizer.
    • chadaustin 12y ago
      Well, zopflipng is! https://code.google.com/p/zopfli/source/browse/README.zopflipng https://code.google.com/p/zopfli/source/browse/README.zopfli...
  • ajslater 12y ago
    I've had the best luck using opitpng and then pngout. https://github.com/ajslater/picopt https://github.com/ajslater/picopt ...will do this automatically for you. Pictopt: A multi-format, recursive, multiprocessor aware, command line image optimizer utility that uses external tools to do the optimizing. For an all in one GUI for Mac approach to this, try ImageOptim
    • imaginenore 12y ago
      PNGOut is definitely better than OptiPNG most of the time: http://www.olegkikin.com/png_optimizers/ http://www.olegkikin.com/png_optimizers/
      • jibsen 12y ago
        zopflipng (with -m switch) is close to or better than the best on those five images: 1_zopflipng.png 8.466 2_zopflipng.png 18.739 3_zopflipng.png 8.012 4_zopflipng.png 91.879 5_zopflipng.png 1.117
• panzi 12y ago
  Yes, I even mentioned that.