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2. JPEGmini - Wikipedia

   en.wikipedia.org/wiki/JPEGmini

   [5] [6] This technology is integrated into JPEGmini Pro allowing users to reduce the file size of their photos and videos with limited quality reduction. JPEGmini technology is built around a perceptually aligned image quality measure, which reliably determines the maximum amount of compression which can be applied to each individual image or ...

3. Guetzli - Wikipedia

   en.wikipedia.org/wiki/Guetzli

   Guetzli supports only the top of JPEG's quality range (quantizer settings 84–100) [7] [8] and supports only sequential (non-"progressive") encoding. Guetzli is more effective with bigger files. [8] Google says it is a demonstration of the potential of psychovisual optimizations, intended to motivate further research into future JPEG encoders. [2]

4. Free Lossless Image Format - Wikipedia

   en.wikipedia.org/wiki/Free_Lossless_Image_Format

   Free Lossless Image Format (FLIF) is a lossless image format claiming to outperform PNG, lossless WebP, lossless BPG and lossless JPEG 2000 in terms of compression ratio on a variety of inputs. [ 4 ]

5. Lossy compression - Wikipedia

   en.wikipedia.org/wiki/Lossy_compression

   While data reduction (compression, be it lossy or lossless) is a main goal of transform coding, it also allows other goals: one may represent data more accurately for the original amount of space [5] – for example, in principle, if one starts with an analog or high-resolution digital master, an MP3 file of a given size should provide a better ...

6. libjpeg - Wikipedia

   en.wikipedia.org/wiki/Libjpeg

   The original variant is maintained and published by the Independent JPEG Group (IJG). Meanwhile, there are several forks with additional features. JPEG JFIF images are widely used on the Web. The amount of compression can be adjusted to achieve the desired trade-off between file size and visual quality. [4]

7. Lossless JPEG - Wikipedia

   en.wikipedia.org/wiki/Lossless_JPEG

   IrfanView image viewer and editor has full read+write support for JPEG-LS image codec (.jls file extension). XnView image viewer and editor claims the capability to read JPEG-LS (.jls) files. However, XnViewMP v0.98.1 can not read JPEG-LS files created by IrfanView v4.54. CharLS - an open-source JPEG-LS codec. Thomas Richter's libjpeg - an open ...