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2. Image compression - Wikipedia

   en.wikipedia.org/wiki/Image_compression

   Image compression. Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission. Algorithms may take advantage of visual perception and the statistical properties of image data to provide superior results compared with generic data compression methods which are used for other ...

3. Comparison gallery of image scaling algorithms - Wikipedia

   en.wikipedia.org/wiki/Comparison_gallery_of...

   Comparison gallery of image scaling algorithms

4. JPEG - Wikipedia

   en.wikipedia.org/wiki/JPEG

   JPEG - Wikipedia ... JPEG

5. Wikipedia : Featured picture criteria/Image size

   en.wikipedia.org/.../Image_size

   Compression of an image to reduce file size (in Kb) is usually "lossy" and is not advised for featured pictures. Image compression will reduce download times and save disk space, but it does so at the expense of fine detail and overall image quality. If in doubt, when saving JPEG files, always select the "maximum" quality setting.

6. PNGOUT - Wikipedia

   en.wikipedia.org/wiki/PNGOUT

   PNGOUT is a freeware command line optimizer for PNG images written by Ken Silverman. The transformation is lossless, meaning that the resulting image is visually identical to the source image. According to its author, this program can often get higher compression than other optimizers by 5–10%. [3] It is possible to compress some inflated ...

7. Image scaling - Wikipedia

   en.wikipedia.org/wiki/Image_scaling

   Image scaling - Wikipedia ... Image scaling