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2. Image compression - Wikipedia

   en.wikipedia.org/wiki/Image_compression

   Image compression is a data compression technique for digital images, to reduce their cost for storage or transmission. Learn about lossy and lossless compression, methods such as DCT, color quantization, and scalability, and history of image compression standards.

3. Free Lossless Image Format - Wikipedia

   en.wikipedia.org/wiki/Free_Lossless_Image_Format

   FLIF is a free and open image format that claims to outperform other lossless formats in compression ratio. It uses MANIAC algorithm, reversible YCoCg color space, and supports alpha channel and progressive interlacing.

4. Image file format - Wikipedia

   en.wikipedia.org/wiki/Image_file_format

   Learn about different types of image file formats, such as JPEG, PNG, GIF, and how they are compressed, stored, and used. Compare raster and vector formats, and see examples of common graphic file formats.

5. JPEG - Wikipedia

   en.wikipedia.org/wiki/JPEG

   JPEG is a method of lossy compression for digital images, developed by a group of experts in 1986 and published in 1992. The full form of JPEG is Joint Photographic Experts Group, which stands for the committee that created the standard and other picture coding standards.

6. PNG - Wikipedia

   en.wikipedia.org/wiki/PNG

   PNG is a file format that supports lossless data compression and transparency for images. It was developed as a free alternative to GIF and has a .png file extension and an image/png media type.

7. Comparison of e-book formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_e-book_formats

   Learn about the different e-book formats used to create and publish e-books, such as EPUB, PDF, MOBI, and more. Compare their features, advantages, disadvantages, and compatibility with various e-book readers and devices.