Re^2: Gzip content-encoding and PerlMagick

Thanks, you're completely right. Much easier to let PerlMagick do it self. I know this is subjective, but what's the best compression to use for JPEG images, esp map images? I already reduced the amount of colours to 256. Is JPEG2000 > JPEG? BZip, Fax, Group4, JPEG, JPEG2000, LosslessJPEG, LZW, RLE, Zip I know for GIF only LZW can be used, correct?

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Re^3: Gzip content-encoding and PerlMagick by tod222 (Pilgrim) on Aug 13, 2008 at 22:26 UTC
From Wikipedia's entry for JPEG 2000: As of 2008, JPEG 2000 is not widely supported in web browsers... JPEG is designed for photographs, so it's appropriate to use if your map has many color gradations, such as a relief map. If you have a street map with lines and regions of constant solid color, GIF or PNG is likely better due to the lossless compression. Over-compressed JPEGs of this type of image look poor due to the artifacts from the lossy compression.	[reply]

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Re^3: Gzip content-encoding and PerlMagick
by tod222 (Pilgrim) on Aug 13, 2008 at 22:26 UTC

JPEG 2000

As of 2008, JPEG 2000 is not widely supported in web browsers...

If you have a street map with lines and regions of constant solid color, GIF or PNG is likely better due to the lossless compression. Over-compressed JPEGs of this type of image look poor due to the artifacts from the lossy compression.

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