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  2. Image compression - Wikipedia

    en.wikipedia.org/wiki/Image_compression

    JPEG compresses images down to much smaller file sizes, and has become the most widely used image file format. [13] JPEG was largely responsible for the wide proliferation of digital images and digital photos, [14] with several billion JPEG images produced every day as of 2015. [15] Lempel–Ziv–Welch (LZW) is a lossless compression algorithm ...

  3. Lossy compression - Wikipedia

    en.wikipedia.org/wiki/Lossy_compression

    This can be avoided by only producing lossy files from (lossless) originals and only editing (copies of) original files, such as images in raw image format instead of JPEG. If data which has been compressed lossily is decoded and compressed losslessly, the size of the result can be comparable with the size of the data before lossy compression ...

  4. Image file format - Wikipedia

    en.wikipedia.org/wiki/Image_file_format

    An image file format is a file format for a digital image. There are many formats that can be used, such as JPEG, PNG, and GIF. Most formats up until 2022 were for storing 2D images, not 3D ones. The data stored in an image file format may be compressed or uncompressed.

  5. JPEGmini - Wikipedia

    en.wikipedia.org/wiki/JPEGmini

    Image optimization: Can compresses file size of JPEG images by up to 80% without compromising image quality. It also optimizes high-resolution photos, with a resolution of up to 256MP. Video optimization: The release of JPEGmini 3.3 brought some additional feature of video optimization. Now it can reduce videos by up to 50% while maintaining ...

  6. Lossless compression - Wikipedia

    en.wikipedia.org/wiki/Lossless_compression

    AVIF – AV1 Image File Format; FLIF – Free Lossless Image Format; HEIF – High Efficiency Image File Format, using HEVC; ILBM – (RLE compression of Amiga IFF images) JBIG2 – compression of B&W images; JPEG 2000 – (via Le Gall–Tabatabai 5/3 [5] [3] [6] reversible integer wavelet transform) JPEG-LS; JPEG XL; JPEG XR – formerly ...

  7. 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.