Use ImageMagick to convert TIFF to PNGs, how to improve the speed?

Posted by Woo on Super User See other posts from Super User or by Woo
Published on 2011-01-14T22:13:53Z Indexed on 2011/01/14 22:55 UTC
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convert

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compression

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png

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quality

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tiff

I am using "convert" from IM to get PNGs from multi-page TIFF files, everything is good except the speed. From "convert" documentation, I found: For the MNG and PNG image formats, the quality value sets the zlib compression level (quality / 10) and filter-type (quality % 10). For compression level 0, the Huffman-only strategy is used, which is fastest but not necessarily the worst compression. The default PNG compression is 75. So I tried "-quality 0", but almost no changes with the spreed.

Anyone can share the ideas of how to improve the spreed? Here are my command:

convert 100Pages.tif[0,1,2,3,4,5] -quality 0 100Pages.png

Thanks!

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