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2. Mixed raster content - Wikipedia

   en.wikipedia.org/wiki/Mixed_raster_content

   MRC is recommended to optimise the scanning of documents with harder-to-read text or lower-quality graphics. [3] MRC can also reduce the size of the scanned file, [ 4 ] though higher compression using JBIG2 can sometimes lead to character substitution errors in scanned documents.

3. Lossy compression - Wikipedia

   en.wikipedia.org/wiki/Lossy_compression

   Left side of the image is from a low-quality JPEG image, showing lossy artefacts; the right side is from a PNG image. In information technology , lossy compression or irreversible compression is the class of data compression methods that uses inexact approximations and partial data discarding to represent the content.

4. Image file format - Wikipedia

   en.wikipedia.org/wiki/Image_file_format

   Its purpose is to replace JPEG when quality or file size is an issue. To that end, it features a high data compression ratio, based on a subset of the HEVC video compression standard, including lossless compression. In addition, it supports various meta data (such as EXIF). DEEP — IFF-style format used by TVPaint; DRW (Drawn File)

5. Image compression - Wikipedia

   en.wikipedia.org/wiki/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 digital data.

6. QOI (image format) - Wikipedia

   en.wikipedia.org/wiki/QOI_(image_format)

   The intended purpose was to create an open source lossless compression method that was faster and easier to implement than PNG.Figures specified in the blog post announcing the format claim 20-50 times faster encoding, and 3-4 times faster decoding speed compared to PNG, with similar file sizes. [1]

7. JPEG - Wikipedia

   en.wikipedia.org/wiki/JPEG

   The most common filename extensions for files employing JPEG compression are .jpg and .jpeg, though .jpe, .jfif and .jif are also used. [48] It is also possible for JPEG data to be embedded in other file types – TIFF encoded files often embed a JPEG image as a thumbnail of the main image; and MP3 files can contain a JPEG of cover art in the ...