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GIF was one of the first two image formats commonly used on Web sites, the other being the black-and-white XBM. [5] In September 1995 Netscape Navigator 2.0 added the ability for animated GIFs to loop. While GIF was developed by CompuServe, it used the Lempel–Ziv–Welch (LZW) lossless data compression algorithm patented by Unisys in 1985.
The Quite OK Image Format (QOI) is a specification for lossless image compression of 24-bit (8 bits per color RGB) or 32-bit (8 bits per color with 8-bit alpha channel RGBA) color raster (bitmapped) images, invented by Dominic Szablewski and first announced on 24 November 2021.
A binary image is a digital image that consists of pixels that can have one of exactly two colors, usually black and white. Each pixel is stored as a single bit — i.e. either a 0 or 1. A binary image can be stored in memory as a bitmap : a packed array of bits.
WebP image format Google.webp image/webp General purpose royalty-free WMF: Windows Metafile Format Microsoft.wmf, .wmz XAR: Xar Xara: Xar (graphics).xar application/vnd.xara Xara Photo & Graphic Designer: Yes XBM: X BitMap, colour variant of original black-and-white bitmap (bmp) format .xbm, .bm,.icon, .bitmap image/x-xbitmap
The 256 available colors would be used to generate a dithered approximation of the original image. Without dithering, the colors in the original image would be quantized to the closest available color, resulting in a displayed image that is a poor representation of the original. The very earliest uses were to reduce images to 1-bit black and white.
This is usually the maximum number of grays in ordinary monochrome systems; each image pixel occupies a single memory byte. Most scanners can capture images in 8-bit grayscale, and image file formats like TIFF and JPEG natively support this monochrome palette size. Alpha channels employed for video overlay also use (conceptually) this palette ...
GIF: PSD: ACDSee reads 9 compression formats and writes to 2, reads 33 video formats, and supports 61 image formats and writes to 16, including EMF, PCX, PIC, PICT, PSD, PSP, SGI, TGA, WMF, XBM, various camera formats among others Adobe Bridge: Displays all file types supported by Adobe Creative Suite: Aperture: PDF: JPEG: PNG: TIFF: GIF: PSD
The X Window System uses a similar XBM format for black-and-white images, and XPM (pixelmap) for color images. Numerous other uncompressed bitmap file formats are in use, though most not widely. [7] For most purposes, standardized compressed bitmap files such as GIF, PNG, TIFF, and JPEG are used.