Comments on: IE9 and JPEG-XR: first impressions http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/ Stoyan's blog about <a href="/category/xhtml" class="tag-minor">(x)html(5)</a>, <a href="/category/ajax" class="tag-major">ajax</a>, <a href="/category/bookmarklets" class="tag-major">bookmarklets</a>, <a href="/category/browsers" class="tag-minor">browsers</a>, <a href="/category/css" class="tag-normal">css</a>, <a href="/category/firebug" class="tag-minor">firebug</a>, <a href="/category/javascript" class="tag-numero-uno">javascript</a>, <a href="/category/json" class="tag-normal">json</a>, <a href="/category/mdb2" class="tag-minor">mdb2</a>, <a href="/category/mysql" class="tag-normal">mysql</a>, <a href="/category/pear" class="tag-numero-uno">pear</a>, <a href="/category/performance" class="tag-major">performance</a>, <a href="/category/php" class="tag-numero-uno">php</a>, <a href="/category/phpbb" class="tag-major">phpbb</a>, <a href="/category/tools" class="tag-normal">tools</a>, <a href="/category/yslow" class="tag-minor">yslow</a>, <a href="/category/yui" class="tag-normal">yui</a>, <a href="/category/writing" class="tag-minor">writing</a>, <a href="/category/music" class="tag-major">music</a>,... <a href="/category/life-and-everything" class="tag-normal">life and everything</a>. Sat, 11 Feb 2012 14:07:43 +0000 hourly 1 http://wordpress.org/?v=3.1 By: iphone repair edinburgh http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-78765 iphone repair edinburgh Sun, 02 Oct 2011 06:06:04 +0000 http://www.phpied.com/?p=1366#comment-78765 <strong>iphone repair portsmouth...</strong> [...]IE9 and JPEG-XR: first impressions / Stoyan's phpied.com[...]... iphone repair portsmouth…

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]]> By: Elisha Dupray http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-75277 Elisha Dupray Thu, 16 Dec 2010 02:30:09 +0000 http://www.phpied.com/?p=1366#comment-75277 Top-notch story it is definitely. My teacher has been searching for this content. <a href="http://www.prlog.org/11140576-1498-shanghai-expo-violations-nailed.html" rel="nofollow">1,498 Shanghai Expo Violations Nailed</a> Top-notch story it is definitely. My teacher has been searching for this content. 1,498 Shanghai Expo Violations Nailed

]]> By: natural treatment for liver cancer http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-75219 natural treatment for liver cancer Mon, 13 Dec 2010 19:10:11 +0000 http://www.phpied.com/?p=1366#comment-75219 Appreciation. Sunny post! Note down further. It seems like I happen to regular visitor Appreciation. Sunny post! Note down further. It seems like I happen to regular visitor

]]> By: Yoav Weiss http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-74218 Yoav Weiss Mon, 11 Oct 2010 14:43:29 +0000 http://www.phpied.com/?p=1366#comment-74218 Regarding batch conversions and something that would work on Mac/Linux, there's the reference implementation that came along with the standard at: http://www.itscj.ipsj.or.jp/sc29/open/29view/29n10430att.zip Surprisingly enough it compiles and runs on Linux, so OSX should work too. Just run "make" and you're good to go. However, it only accepts TIFF/PNM/RAW as input :( Regarding batch conversions and something that would work on Mac/Linux, there’s the reference implementation that came along with the standard at:
http://www.itscj.ipsj.or.jp/sc29/open/29view/29n10430att.zip
Surprisingly enough it compiles and runs on Linux, so OSX should work too. Just run “make” and you’re good to go.
However, it only accepts TIFF/PNM/RAW as input :(

]]> By: Gareth http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-73727 Gareth Tue, 03 Aug 2010 21:52:32 +0000 http://www.phpied.com/?p=1366#comment-73727 •Better compression – JPEG XR offers improved efficiency compared to JPEG, and the type of compression artifacts are often less objectionable than the typical JPEG compression artifacts. JPEG XR offers a very wide range of compression levels, including perceptively lossless or mathematically lossless compression. Regardless of your requirements, JPEG XR probably offers a compression option that’s ideal for that scenario. •More image formats – JPEG XR supports 8bpc (bits per channel), 16bpc and 32bpc, as well as several special bit depth formats. Pixel values can be stored as either integers, scaled fixed point numbers or full floating point values; this provides full support for numerous high dynamic range (HDR) imaging scenarios, as well as support for wide gamut color spaces. In addition to 3-channel RGB, JPEG XR supports monochrome, CMYK and n-channel formats up to 16 independent channels. many of these formats also support an alpha channel. This wide range of image formats allows for dramatically better image quality and allows this single new file format to effectively replace many previous formats that were required for specific scenarios. •Advanced decoding features – JPEG XR provides progressive decoding, allowing lower resolution previews or specific cropped areas to be displayed without the need to decode the entire image. Additionally, JPEG XR images can be cropped, rotated, flipped and resized (within certain constraints) without ever needing to decode and then re-encode the image. That means these operations are much, much faster and no additional image quality is lost due to the additional encoding steps. •Better compression – JPEG XR offers improved efficiency compared to JPEG, and the type of compression artifacts are often less objectionable than the typical JPEG compression artifacts. JPEG XR offers a very wide range of compression levels, including perceptively lossless or mathematically lossless compression. Regardless of your requirements, JPEG XR probably offers a compression option that’s ideal for that scenario.

•More image formats – JPEG XR supports 8bpc (bits per channel), 16bpc and 32bpc, as well as several special bit depth formats. Pixel values can be stored as either integers, scaled fixed point numbers or full floating point values; this provides full support for numerous high dynamic range (HDR) imaging scenarios, as well as support for wide gamut color spaces. In addition to 3-channel RGB, JPEG XR supports monochrome, CMYK and n-channel formats up to 16 independent channels. many of these formats also support an alpha channel. This wide range of image formats allows for dramatically better image quality and allows this single new file format to effectively replace many previous formats that were required for specific scenarios.

•Advanced decoding features – JPEG XR provides progressive decoding, allowing lower resolution previews or specific cropped areas to be displayed without the need to decode the entire image. Additionally, JPEG XR images can be cropped, rotated, flipped and resized (within certain constraints) without ever needing to decode and then re-encode the image. That means these operations are much, much faster and no additional image quality is lost due to the additional encoding steps.

]]> By: CSMR http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-73712 CSMR Thu, 29 Jul 2010 18:05:05 +0000 http://www.phpied.com/?p=1366#comment-73712 Hmm, the article: Takes seriously the claims of a group that uses the expressions "based on faulty technologies", "will not support such momentary mistakes" in official documentation. Believes that "quality" is an objective measure between 0 and 1 that has the same meaning across different encoders and different formats. Hmm, the article:

Takes seriously the claims of a group that uses the expressions “based on faulty technologies”, “will not support such momentary mistakes” in official documentation.

Believes that “quality” is an objective measure between 0 and 1 that has the same meaning across different encoders and different formats.

]]> By: Steve Clay http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-73492 Steve Clay Sun, 27 Jun 2010 13:55:32 +0000 http://www.phpied.com/?p=1366#comment-73492 Looks like the advantages of -XR over -2000 are mostly in the <a href="http://blogs.msdn.com/b/billcrow/archive/2006/10/20/msu-evaluates-windows-media-photo-vs-jpeg-2000.aspx" rel="nofollow">algorithm's efficiency and low memory use</a>. Microsoft's developer claimed, "The JPEG-2000 algorithm is considerably more complex and is not appropriate for consumer device implementation." This was four years ago. Looks like the advantages of -XR over -2000 are mostly in the algorithm’s efficiency and low memory use. Microsoft’s developer claimed, “The JPEG-2000 algorithm is considerably more complex and is not appropriate for consumer device implementation.” This was four years ago.

]]> By: Florent V. http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-72815 Florent V. Tue, 27 Apr 2010 09:02:25 +0000 http://www.phpied.com/?p=1366#comment-72815 Comparing the two files: - The “standard” JPEG has some noticeable artifacts in some specific parts (series of dots that are lighter than they should be). - The JPEG-XR doesn't have such noticeable artifacts, but the camera noise seems “bigger” (unless this is not original camera noise, but a different type of artifact in both images). It could be the result of some smoothing algorithm. This was a very limited test, but it seems that the focus of JPEG-XR is on digital cameras: taking big pictures, with millions of pixels, that look good (on screen and print) and don’t weight 10 MB each so that you can send them to friends by email or something. Might not be of much use for the Web. Comparing the two files:
- The “standard” JPEG has some noticeable artifacts in some specific parts (series of dots that are lighter than they should be).
- The JPEG-XR doesn’t have such noticeable artifacts, but the camera noise seems “bigger” (unless this is not original camera noise, but a different type of artifact in both images). It could be the result of some smoothing algorithm.

This was a very limited test, but it seems that the focus of JPEG-XR is on digital cameras: taking big pictures, with millions of pixels, that look good (on screen and print) and don’t weight 10 MB each so that you can send them to friends by email or something. Might not be of much use for the Web.

]]> By: RC http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-72694 RC Mon, 19 Apr 2010 12:49:00 +0000 http://www.phpied.com/?p=1366#comment-72694 MS had a bunch of in depth posts up on one of their graphics developer blogs. I don't have the link....but they laid out the reasoning and benefits of the format. I wonder if you actually disagree with their test cases or not. MS had a bunch of in depth posts up on one of their graphics developer blogs. I don’t have the link….but they laid out the reasoning and benefits of the format. I wonder if you actually disagree with their test cases or not.

]]> By: Andrea http://www.phpied.com/ie9-and-jpeg-xr-first-impressions/#comment-72581 Andrea Mon, 05 Apr 2010 17:21:11 +0000 http://www.phpied.com/?p=1366#comment-72581 This is very interesting, but you did the test in the wrong direction, I think. Instead of starting from the image size, you shod start to the "visual quality" : 1- Save a jpeg at an acceptable quality, enough for not revealing the typical compression artefacts. You have to do this visually. 2- Save the same image as jpeg-xr, again with a similar acceptable quality for your eyes. 3- compare the two file sizes. Based on the xr promises, you should see a difference in the file size. The idea is that xr can do a better job with lower quality settings. Anyway, due to the patents, I would never endorse such file format. (damn, it's ten years I'm waiting for jpeg2000 to get used!) This is very interesting, but you did the test in the wrong direction, I think.

Instead of starting from the image size, you shod start to the “visual quality” :
1- Save a jpeg at an acceptable quality, enough for not revealing the typical compression artefacts. You have to do this visually.
2- Save the same image as jpeg-xr, again with a similar acceptable quality for your eyes.
3- compare the two file sizes. Based on the xr promises, you should see a difference in the file size.

The idea is that xr can do a better job with lower quality settings.

Anyway, due to the patents, I would never endorse such file format.
(damn, it’s ten years I’m waiting for jpeg2000 to get used!)

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