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Thread: Whats best tool to go from 24PNG to <8Bit image

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    Whats best tool to go from 24PNG to <8Bit image

    There are many 24PNG that can be lossy compressed after with ETC, but before needs to be scaled down with as smaller number of colors as possible.

    So far i am using GIMP(indexing image), but whole workflow is a bit slow.....any other alternatives.

    Thank you in advance

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    Member jibz's Avatar
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    pngquant works quite well.

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    try IrfanView

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    tnx for irfanview and pngquant recommendations...will try both.......but during my googling, somehow i got under impression pngquant is more powerfull

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    Quote Originally Posted by dado023 View Post
    There are many 24PNG that can be lossy compressed after with ETC, but before needs to be scaled down with as smaller number of colors as possible.
    pngquant works really very well and it is likely the current leader in palettization quality. However, if you need something that is much faster than pngquant, you can try an old algorithms from Zoltan Szabadka and me: https://code.google.com/archive/p/greedy-palettization/

    It is similar to the initialization step of k means++ with some additional predictive heuristics. It is probably 100x faster and only slightly worse than pngquant in quality.

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    Quote Originally Posted by Jyrki Alakuijala View Post
    pngquant works really very well and it is likely the current leader in palettization quality. However, if you need something that is much faster than pngquant, you can try an old algorithms from Zoltan Szabadka and me: https://code.google.com/archive/p/greedy-palettization/

    It is similar to the initialization step of k means++ with some additional predictive heuristics. It is probably 100x faster and only slightly worse than pngquant in quality.
    Thanks for the heads up.

    To be honest, i always go for quality and filesize, speed on modern hardware is relatively acceptable in most cases.

    This brings me to next important question, which pngquant gives best results in that manner?, so far i have only found out for "
    Code:
    pngquant.exe --force --verbose --speed=1 --quality=25-95 image.png
    Is there any other command switch, which will further analize input image, to output better results.

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    Commercial. Oddles of options if you want the best, i use it through IrfanView:
    http://www.ximagic.com/q_index.html

    Another free option, have used it sometimes mainly when comparing quantizer quality and i like it's palette sorting.
    http://x128.ho.ua/color-quantizer.html

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    Quote Originally Posted by Intrinsic View Post
    Commercial. Oddles of options if you want the best, i use it through IrfanView:
    http://www.ximagic.com/q_index.html

    Another free option, have used it sometimes mainly when comparing quantizer quality and i like it's palette sorting.
    http://x128.ho.ua/color-quantizer.html
    http://www.fosshub.com/IrfanView.htm..._442_setup.exe
    how do you use it through the Irfanview, i installed all plugins, but i didn't manage to find it in Irfanview :|, help

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    Read the site. It's not part of IrfanView, it's a plugin you buy and IrfanView is compatible with.

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    Quote Originally Posted by Malloc Voidstar View Post
    Read the site. It's not part of IrfanView, it's a plugin you buy and IrfanView is compatible with.
    tbh, i am not really interested in commercial solutions, ..thanks though

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