[magick-users] Re: Best way to do png shrink

[David Favor]

Maybe I'm going about this wrong. Using optipng barely changes
the size of the png files, even using -o7 which can run for
several minutes.

I'm using montage/covert to create an thumbnail imagemap as in:

    montage -label '%f' -tile 4x -frame 5 -mattecolor wheat \
            -shadow -geometry 160x120+5+5 $(ls */*/*) index.html

    convert -quality 90 +dither -colors 64 -depth 8 index.png index.png

This shrinks index.png from 2,762,129 to 171,419 while optipng -o7 only shrinks
index.png to 2,464,142.

Maybe a better way to do this is to instruct montage to output a gif file.

Let me know the secret incantation to have montage create a gif file with
passed parameters like -colors 64.

Thanks.

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