A tricky PNG to compress

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2013-11-14
2013-11-14
  • Just for fun:

    (printf iVBORw0KGgoAAAANSUhEUgAAAGUAAABlBAMAAACmUjD8AAAAMFBMVEXmJwpQjvjjoAwR
    printf LlOQOnwlTePSZ8D2xUbjHAIAbakIXKF5+d5adymjAD+LAVAUqJ2IgG2SAAAAUElEQVR4
    printf nOXRsQkAAAzDMGjz/829oLOGgC6wZzPNss14fowPoHh+jA+geH6MD6B4fowPoHh+jA+g
    printf eH6MD6B4fowPoHh+jA+geH6MD6B4/scBrY89jtdoRicAAAAASUVORK5CYII=) |
    base64 -d > silly.png
    convert silly.png t.ppm
    convert t.ppm sillyopt.png
    optipng -o 9 sillyopt.png
    ls -l silly.png sillyopt.png

    -rw-r--r-- 1 xxxxxxxx xxxxxxxx 197 2013-11-14 09:48 silly.png
    -rw-r--r-- 1 xxxxxxxx xxxxxxxx 3659 2013-11-14 09:48 sillyopt.png

    Yes, I deliberately made "silly.png" hard to recompress, so this is not a criticism. OptiPNG is a great program and has saved me disc space and bandwidth.