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2. Ericsson Texture Compression - Wikipedia

   en.wikipedia.org/wiki/Ericsson_Texture_Compression

   The original 'ETC1' compression scheme provides 6x compression of 24-bit RGB data. It does not support the compression of images with Alpha components, although there are work-arounds for this. [3] ETC1 takes 4x4 groups of pixel data and compresses each into a single 64-bit word. The 4×4 pixel group is first divided into two 4×2 chunks ...

3. 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.

4. Comparison of graphics file formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_graphics...

   Numerous biomedical imaging applications [4] (e.g. OsiriX, XMedCon), some general bitmap graphics applications (e.g. GIMP, Photoshop) DjVu: DjVu AT&T Research .djvu, .djv image/vnd.djvu DPX: Digital Picture eXchange file format .dpx image/dpx DRF: Kodak Pro Back RAW Kodak.drf Encapsulated PostScript: page description/scripting language (see ...

5. Group 4 compression - Wikipedia

   en.wikipedia.org/wiki/Group_4_compression

   Both G3-2D and G4 add a two-dimensional feature to achieve greater compression by taking advantage of vertical symmetry. A worst-case image would be an alternating pattern of single-pixel black and white dots offset by one pixel on even/odd lines. G4 compression would actually increase the file size on this type of image.

6. 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 ...

7. Mixed raster content - Wikipedia

   en.wikipedia.org/wiki/Mixed_raster_content

   Mixed raster content (MRC) is a method for compressing images that contain both binary-compressible text and continuous-tone components, using image segmentation methods to improve the level of compression and the quality of the rendered image. [1]