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Thread: Does a jpeg2000 optimizer exist ?

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    Does a jpeg2000 optimizer exist ?

    Is ther are (free) utility similar to jpgoptim/jpegtran that optimizes the compression of jpg2000 files ?

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    Quote Originally Posted by SvenBent View Post
    Is ther are (free) utility similar to jpgoptim/jpegtran that optimizes the compression of jpg2000 files ?
    Yes, certainly, but mine is not free. Or not "mine" - I only wrote it, but I do not own it. Such tools are called "transcoders", actually.

    However, improvement of compression efficiency is often not quite the point here. Unlike JPEG, JPEG 2000 does not use "huffman coding", and thus, the number of freedoms in the entropy coder are lower. You have other freedoms, though. What you can do is take out layers (less overhead), reduce the size or quality of the image, or optimize it for a human observer by changing the objective function of the R/D optimizer.

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    i was under the impression that transcoding meant reencoding into a new format mpeg2 > mpeg4. which would mean transcoding introduces a new levels of lossy'ness.

    Thank you for your tips. but reducing or altering the actually image to gain a smaller file is not what im looking for. I was not aware jpeg2000 did not use a huffman coding.

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