jpeg-xr

Why Google recommends using JPEG 2000 and JPEG XR and after Google Chrome doesn't support them?

由 自闭症网瘾萝莉.ら 提交于 2021-02-07 20:28:11
问题 Google recommends "Serve Images in Next-Gen Formats" and specifically mentions WebP, JPEG 2000 and JPEG XR, but then it doesn't provide support for 2 of them (JPEG 2000 and JPEG XR) in its own browser . Can someone please explain me why is this? 回答1: This is because there is support for those formats in other browsers not just Google Chrome. If all the users on the internet visited your website with Google Chrome then those formats would be insignificant to mention. Here is a free tool that

Is re-encoding JPEG images an idempotent operation?

由 僤鯓⒐⒋嵵緔 提交于 2019-12-19 06:41:03
问题 I am aware that JPEG compression is lossy. I have 2 questions: Given an operation T: 1. Take a JPEG-80 image 2. Decode it to a byte buffer 3. Encode given byte buffer as JPEG-80 Is T an idempotent operation in terms of visual quality? Or will the quality of the image keep degrading as I repeat T? Does the same hold true for the JPEG-XR codec? Thank you! Edit : Since there have been conflicting answers, it would be great if you could provide references! 回答1: It's not guaranteed, but it may

Is re-encoding JPEG images an idempotent operation?

由 独自空忆成欢 提交于 2019-12-19 06:40:29
问题 I am aware that JPEG compression is lossy. I have 2 questions: Given an operation T: 1. Take a JPEG-80 image 2. Decode it to a byte buffer 3. Encode given byte buffer as JPEG-80 Is T an idempotent operation in terms of visual quality? Or will the quality of the image keep degrading as I repeat T? Does the same hold true for the JPEG-XR codec? Thank you! Edit : Since there have been conflicting answers, it would be great if you could provide references! 回答1: It's not guaranteed, but it may

How to convert .tiff/.bmp to JPEG-XR with Imagemagick's convert tool?

由 泪湿孤枕 提交于 2019-12-07 13:20:00
问题 i'm using the convert tool from imagemagick to convert images to the jpeg-xr format. i'm using the latest version under debian linux (ImageMagick-6.8.6-8). The problem is convert -format jxr or convert -format wdp produce the same format as my source image and no valid jpeg-xr file. Is my -format parameter wrong? i didn't find anything about it thanks in advance 回答1: The -format option is for outputting metadata in a specific format, not selecting the output file format. Selecting a specific

System.Drawing.Bitmap to JPEG XR

由 泄露秘密 提交于 2019-12-02 04:54:09
问题 How can I encode a System.Drawing.Bitmap (v4.0) to the JPEG XR stream? 回答1: This can be solved through an extension method: using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Windows.Media.Imaging; /// <remarks> /// Requires reference to <c>System.Drawing</c>, <c>PresentationCore</c> and <c>WindowsBase</c>. /// </remarks> public static class JpegXr { public static MemoryStream SaveJpegXr(this Bitmap bitmap, float quality) { var stream = new MemoryStream();

System.Drawing.Bitmap to JPEG XR

由 ▼魔方 西西 提交于 2019-12-01 23:19:48
How can I encode a System.Drawing.Bitmap (v4.0) to the JPEG XR stream? Václav Dajbych This can be solved through an extension method : using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Windows.Media.Imaging; /// <remarks> /// Requires reference to <c>System.Drawing</c>, <c>PresentationCore</c> and <c>WindowsBase</c>. /// </remarks> public static class JpegXr { public static MemoryStream SaveJpegXr(this Bitmap bitmap, float quality) { var stream = new MemoryStream(); SaveJpegXr(bitmap, quality, stream); stream.Seek(0, SeekOrigin.Begin); return stream; } public

Is re-encoding JPEG images an idempotent operation?

由 瘦欲@ 提交于 2019-12-01 04:49:53
I am aware that JPEG compression is lossy. I have 2 questions: Given an operation T: 1. Take a JPEG-80 image 2. Decode it to a byte buffer 3. Encode given byte buffer as JPEG-80 Is T an idempotent operation in terms of visual quality? Or will the quality of the image keep degrading as I repeat T? Does the same hold true for the JPEG-XR codec? Thank you! Edit : Since there have been conflicting answers, it would be great if you could provide references! It's not guaranteed, but it may happen. Especially if you repeat the encode -> decode -> encode -> decode process enough times, it will
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