Saving in Jpeg 2000?

When do you usually save you files in "Jpeg 2000" format rather than "Jpeg" format? Do you use Jpeg 2000 at all?

Jpeg 2k is not often used "as is" though it produces better image quality than Jpeg. I never met "pure" jpeg 2k photographies.

I never use it because I've heard what Wikipedia says:

JPEG 2000 has been published as an ISO standard, ISO/IEC 15444. As of 2010, JPEG 2000 is not widely supported in web browsers, and hence is not generally used on the World Wide Web.

Interesting what it's capabilities are though. Also from Wikipedia:

While there is a modest increase in compression performance of JPEG 2000 compared to JPEG, the main advantage offered by JPEG 2000 is the significant flexibility of the codestream. The codestream obtained after compression of an image with JPEG 2000 is scalable in nature, meaning that it can be decoded in a number of ways; for instance, by truncating the codestream at any point, one may obtain a representation of the image at a lower resolution, or signal-to-noise ratio – see scalable compression. By ordering the codestream in various ways, applications can achieve significant performance increases. However, as a consequence of this flexibility, JPEG 2000 requires encoders/decoders that are complex and computationally demanding. Another difference, in comparison with JPEG, is in terms of visual artifacts: JPEG 2000 produces ringing artifacts, manifested as blur and rings near edges in the image, while JPEG produces ringing artifacts and 'blocking' artifacts, due to its 8×8 blocks.

It sounds like what they're saying is that it can be requested from a server in multiple resolutions, all from a single image.

I guess people use TIFF if they want to have higher resolution.

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Originally Posted by GB1

I never use it because I've heard what Wikipedia says:

JPEG 2000 has been published as an ISO standard, ISO/IEC 15444. As of 2010, JPEG 2000 is not widely supported in web browsers, and hence is not generally used on the World Wide Web.

Interesting what it's capabilities are though. Also from Wikipedia:

While there is a modest increase in compression performance of JPEG 2000 compared to JPEG, the main advantage offered by JPEG 2000 is the significant flexibility of the codestream. The codestream obtained after compression of an image with JPEG 2000 is scalable in nature, meaning that it can be decoded in a number of ways; for instance, by truncating the codestream at any point, one may obtain a representation of the image at a lower resolution, or signal-to-noise ratio – see scalable compression. By ordering the codestream in various ways, applications can achieve significant performance increases. However, as a consequence of this flexibility, JPEG 2000 requires encoders/decoders that are complex and computationally demanding. Another difference, in comparison with JPEG, is in terms of visual artifacts: JPEG 2000 produces ringing artifacts, manifested as blur and rings near edges in the image, while JPEG produces ringing artifacts and 'blocking' artifacts, due to its 8×8 blocks.

It sounds like what they're saying is that it can be requested from a server in multiple resolutions, all from a single image.

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Thanks for the clarification!

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Originally Posted by wedding photographer

I guess people use TIFF if they want to have higher resolution.

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Not resolution, jpeg and tiff can work in the same resolutions. Tiff is merely the lossless, or non-compressed format.

This is a bit off-topic (or at least off sub-forum) but the place where JPEG2000 really seems to be coming into it's own is in digital video. Some professional studios are using the compression of JPEG2000 to reduce digital transfer and file access times to milliseconds.

Not really my area of expertise, but I found it interesting.

- Joe U.

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Originally Posted by Medley

This is a bit off-topic (or at least off sub-forum) but the place where JPEG2000 really seems to be coming into it's own is in digital video. Some professional studios are using the compression of JPEG2000 to reduce digital transfer and file access times to milliseconds.

Not really my area of expertise, but I found it interesting.

- Joe U.

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I don't think I will use JEP2000 anytime soon... :)