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Indexed color

Index Indexed color

In computing, indexed color is a technique to manage digital images' colors in a limited fashion, in order to save computer memory and file storage, while speeding up display refresh and file transfers. [1]

100 relations: Adobe Distiller, Adobe Photoshop, Adobe Systems, Aldus, Amiga, Amiga Advanced Graphics Architecture, Amiga Halfbrite mode, Atari ST, Attribute clash, Binary code, Binary image, Bit, Bit plane, BMP file format, Byte, Central processing unit, CMYK color model, Code, Color calibration, Color cycling, Color depth, Color Graphics Adapter, Color management, Color quantization, Colour banding, Component video, CompuServe, Computer data storage, Computer hardware, Core dump, Data structure alignment, DEFLATE, Demoscene, Digital image, Digital-to-analog converter, Dither, Electronic Arts, Enhanced Graphics Adapter, False color, Floppy disk, Framebuffer, Gamma correction, GIF, Gradient, Grayscale, Group 4 compression, Hard disk drive, Hertz, High color, Home computer, ..., HTML, IBM PC compatible, Icon (computing), ILBM, Image compression, Image file formats, Integrated circuit, Interlacing (bitmaps), JPEG, Lempel–Ziv–Welch, List of color palettes, List of home computers by video hardware, Magnetic tape data storage, Microsoft, MSX, Nibble, Original Chip Set, PackBits, Packed pixel, Palette (computing), PC Paintbrush, PCX, PDF, Personal computer, Photographic print toning, PICtor PIC image format, Pixel, Planar (computer graphics), Portable Network Graphics, Primary color, Random-access memory, ReGIS, RGB color model, Run-length encoding, Slide show, Spatial anti-aliasing, Super video graphics array, Thumbnail, TIFF, Truevision, Truevision TGA, Video card, Video Graphics Array, Video overlay, Video RAM (dual-ported DRAM), VT220, YPbPr, ZSoft Corporation, 32-bit, 8-bit color. Expand index (50 more) »

Adobe Distiller

Adobe Acrobat Distiller is a computer program for converting documents from PostScript format to Adobe PDF (Portable Document Format), the native format of the Adobe Acrobat family of products.

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Adobe Photoshop

Adobe Photoshop is a raster graphics editor developed and published by Adobe Systems for macOS and Windows.

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Adobe Systems

Adobe Systems Incorporated, commonly known as Adobe, is an American multinational computer software company.

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Aldus

Aldus Corporation was a software company that developed desktop publishing (DTP) software.

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Amiga

The Amiga is a family of personal computers introduced by Commodore in 1985.

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Amiga Advanced Graphics Architecture

Amiga Advanced Graphics Architecture (AGA) is the third-generation Amiga graphic chipset, first used in the Amiga 4000 in 1992.

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Amiga Halfbrite mode

Extra Half-Brite (EHB) mode is a planar display mode of the Commodore Amiga computer.

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Atari ST

The Atari ST is a line of home computers from Atari Corporation and the successor to the Atari 8-bit family.

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Attribute clash

Attribute clash (also known as colour clash or bleeding) is a display artifact caused by limits in the graphics circuitry of some colour 8-bit home computers, most notably the Sinclair ZX Spectrum, where it meant that only two colours could be used in any 8×8 tile of pixels.

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Binary code

A binary code represents text, computer processor instructions, or any other data using a two-symbol system.

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Binary image

A binary image is a digital image that has only two possible values for each pixel.

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Bit

The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications.

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Bit plane

A bit plane of a digital discrete signal (such as image or sound) is a set of bits corresponding to a given bit position in each of the binary numbers representing the signal.

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BMP file format

The BMP file format, also known as bitmap image file or device independent bitmap (DIB) file format or simply a bitmap, is a raster graphics image file format used to store bitmap digital images, independently of the display device (such as a graphics adapter), especially on Microsoft Windows and OS/2 operating systems.

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Byte

The byte is a unit of digital information that most commonly consists of eight bits, representing a binary number.

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Central processing unit

A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.

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CMYK color model

The CMYK color model (process color, four color) is a subtractive color model, used in color printing, and is also used to describe the printing process itself.

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Code

In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form or representation, sometimes shortened or secret, for communication through a communication channel or storage in a storage medium.

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Color calibration

The aim of color calibration is to measure and/or adjust the color response of a device (input or output) to a known state.

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Color cycling

Color cycling, also known as palette shifting, is a technique used in computer graphics in which colors are changed in order to give the impression of animation.

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Color depth

Color depth or colour depth (see spelling differences), also known as bit depth, is either the number of bits used to indicate the color of a single pixel, in a bitmapped image or video frame buffer, or the number of bits used for each color component of a single pixel.

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Color Graphics Adapter

The Color Graphics Adapter (CGA), originally also called the Color/Graphics Adapter or IBM Color/Graphics Monitor Adapter, introduced in 1981, was IBM's first graphics card and first color display card for the IBM PC.

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Color management

In digital imaging systems, color management is the controlled conversion between the color representations of various devices, such as image scanners, digital cameras, monitors, TV screens, film printers, computer printers, offset presses, and corresponding media.

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Color quantization

In computer graphics, color quantization or color image quantization is a process that reduces the number of distinct colors used in an image, usually with the intention that the new image should be as visually similar as possible to the original image.

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Colour banding

Colour banding, or Color banding (American English) is a problem of inaccurate colour presentation in computer graphics.

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Component video

Component video is a video signal that has been split into two or more component channels.

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CompuServe

CompuServe (CompuServe Information Service, also known by its initialism CIS) was the first major commercial online service provider in the United States.

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Computer data storage

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media that are used to retain digital data.

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Computer hardware

Computer hardware includes the physical parts or components of a computer, such as the central processing unit, monitor, keyboard, computer data storage, graphic card, sound card and motherboard.

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Core dump

In computing, a core dump, crash dump, memory dump, or system dump consists of the recorded state of the working memory of a computer program at a specific time, generally when the program has crashed or otherwise terminated abnormally.

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Data structure alignment

Data structure alignment refers to the way data is arranged and accessed in computer memory.

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DEFLATE

In computing, Deflate is a lossless data compression algorithm and associated file format that uses a combination of the LZ77 algorithm and Huffman coding.

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Demoscene

The demoscene is an international computer art subculture focused on producing demos: self-contained, sometimes extremely small, computer programs that produce audio-visual presentations.

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Digital image

A digital image is a numeric representation, normally binary, of a two-dimensional image.

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Digital-to-analog converter

In electronics, a digital-to-analog converter (DAC, D/A, D2A, or D-to-A) is a system that converts a digital signal into an analog signal.

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Dither

Dither is an intentionally applied form of noise used to randomize quantization error, preventing large-scale patterns such as color banding in images.

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Electronic Arts

Electronic Arts Inc. (EA) is an American video game company headquartered in Redwood City, California.

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Enhanced Graphics Adapter

The Enhanced Graphics Adapter (EGA) is an IBM PC computer display standard from 1984 that superseded and exceeded the capabilities of the CGA standard introduced with the original IBM PC, and was itself superseded by the VGA standard in 1987.

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False color

False color (or false colour) refers to a group of color rendering methods used to display images in color which were recorded in the visible or non-visible parts of the electromagnetic spectrum.

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Floppy disk

A floppy disk, also called a floppy, diskette, or just disk, is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles.

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Framebuffer

A framebuffer (frame buffer, or sometimes framestore) is a portion of RAM containing a bitmap that drives a video display.

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Gamma correction

Gamma correction, or often simply gamma, is a nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems.

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GIF

The Graphics Interchange Format, better known by its acronym GIF, is a bitmap image format that was developed by a team at the bulletin board service (BBS) provider CompuServe led by American computer scientist Steve Wilhite on June 15, 1987.

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Gradient

In mathematics, the gradient is a multi-variable generalization of the derivative.

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Grayscale

In photography, computing, and colorimetry, a grayscale or greyscale image is one in which the value of each pixel is a single sample representing only an amount of light, that is, it carries only intensity information.

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Group 4 compression

CCITT Group 4 compression, also referred to as G4 or Modified Modified READ (MMR), is a lossless method of image compression used in Group 4 fax machines defined in the ITU-T T.6 fax standard.

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Hard disk drive

A hard disk drive (HDD), hard disk, hard drive or fixed disk is an electromechanical data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.

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Hertz

The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.

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High color

High color graphics (variously spelled Highcolor, Hicolor, Hi-color, Hicolour, and Highcolour, and known as Thousands of colors on a Macintosh) is a method of storing image information in a computer's memory such that each pixel is represented by two bytes.

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Home computer

Home computers were a class of microcomputers entering the market in 1977, and becoming common during the 1980s.

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HTML

Hypertext Markup Language (HTML) is the standard markup language for creating web pages and web applications.

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IBM PC compatible

IBM PC compatible computers are computers similar to the original IBM PC, XT, and AT, able to use the same software and expansion cards.

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Icon (computing)

In computing, an icon is a pictogram or ideogram displayed on a computer screen in order to help the user navigate a computer system or mobile device.

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ILBM

Interleaved Bitmap (ILBM) is an image file format conforming to the Interchange File Format (IFF) standard.

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Image compression

Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission.

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Image file formats

Image file formats are standardized means of organizing and storing digital images.

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Integrated circuit

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material, normally silicon.

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Interlacing (bitmaps)

Interlacing (also known as interleaving) is a method of encoding a bitmap image such that a person who has partially received it sees a degraded copy of the entire image.

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JPEG

JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography.

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Lempel–Ziv–Welch

Lempel–Ziv–Welch (LZW) is a universal lossless data compression algorithm created by Abraham Lempel, Jacob Ziv, and Terry Welch.

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List of color palettes

This article is a list of the color palettes for notable computer graphics, terminals and video game console hardware.

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List of home computers by video hardware

This is a list of home computers, sorted alphanumerically, which lists all relevant details of their video hardware.

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Magnetic tape data storage

Magnetic tape data storage is a system for storing digital information on magnetic tape using digital recording.

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Microsoft

Microsoft Corporation (abbreviated as MS) is an American multinational technology company with headquarters in Redmond, Washington.

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MSX

MSX is a standardized home computer architecture, first announced by Microsoft on June 16, 1983, and marketed by Kazuhiko Nishi, then Vice-president at Microsoft Japan and Director at ASCII Corporation.

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Nibble

In computing, a nibble (occasionally nybble or nyble to match the spelling of byte) is a four-bit aggregation, or half an octet.

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Original Chip Set

The Original Chip Set (OCS) is a chipset used in the earliest Commodore Amiga computers and defined the Amiga's graphics and sound capabilities.

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PackBits

PackBits is a fast, simple lossless compression scheme for run-length encoding of data.

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Packed pixel

In packed pixel or chunky framebuffer organization, the bits defining each pixel are grouped together.

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Palette (computing)

In computer graphics, a palette is a finite set of colors.

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PC Paintbrush

PC Paintbrush is graphics editing software created by the ZSoft Corporation in 1984 for computers running the MS-DOS operating system.

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PCX

PCX, standing for PiCture eXchange, is an image file format developed by the now-defunct ZSoft Corporation of Marietta, Georgia, United States.

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PDF

The Portable Document Format (PDF) is a file format developed in the 1990s to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.

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Personal computer

A personal computer (PC) is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.

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Photographic print toning

In photography, toning is a method of changing the color of black-and-white photographs.

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PICtor PIC image format

PICtor is an image file format developed by John Bridges, the principal author of PCPaint, the first Paintbrush program for the PC.

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Pixel

In digital imaging, a pixel, pel, dots, or picture element is a physical point in a raster image, or the smallest addressable element in an all points addressable display device; so it is the smallest controllable element of a picture represented on the screen.

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Planar (computer graphics)

In computer graphics, planar is the method of representing pixel colors with several bitplanes of RAM.

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Portable Network Graphics

Portable Network Graphics (PNG, pronounced or) is a raster graphics file format that supports lossless data compression.

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Primary color

A set of primary colors is, most tangibly, a set of real colorants or colored lights that can be combined in varying amounts to produce a gamut of colors.

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Random-access memory

Random-access memory (RAM) is a form of computer data storage that stores data and machine code currently being used.

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ReGIS

ReGIS, short for Remote Graphic Instruction Set, was a vector graphics markup language developed by Digital Equipment Corporation (DEC) for later models of their famous VT series of computer terminals.

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RGB color model

The RGB color model is an additive color model in which red, green and blue light are added together in various ways to reproduce a broad array of colors.

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Run-length encoding

Run-length encoding (RLE) is a very simple form of lossless data compression in which runs of data (that is, sequences in which the same data value occurs in many consecutive data elements) are stored as a single data value and count, rather than as the original run.

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Slide show

A slide show is a presentation of a series of still images on a projection screen or electronic display device, typically in a prearranged sequence.

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Spatial anti-aliasing

In digital signal processing, spatial anti-aliasing is the technique of minimizing the distortion artifacts known as aliasing when representing a high-resolution image at a lower resolution.

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Super video graphics array

Super Video Graphics Array or Ultra Video Graphics Array, almost always abbreviated to Super VGA, Ultra VGA or just SVGA or UVGA is a broad term that covers a wide range of computer display standards.

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Thumbnail

Thumbnails are reduced-size versions of pictures or videos, used to help in recognizing and organizing them, serving the same role for images as a normal text index does for words.

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TIFF

Tagged Image File Format, abbreviated TIFF or TIF, is a computer file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers.

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Truevision

Truevision, Inc. was a maker of digital video processing add-on boards for PC computers.

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Truevision TGA

Truevision TGA, often referred to as TARGA, is a raster graphics file format created by Truevision Inc. (now part of Avid Technology).

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Video card

A video card (also called a display card, graphics card, display adapter or graphics adapter) is an expansion card which generates a feed of output images to a display (such as a computer monitor).

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Video Graphics Array

Video Graphics Array (VGA) is the display hardware first introduced with the IBM PS/2 line of computers in 1987, following CGA and EGA introduced in earlier IBM personal computers.

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Video overlay

Video overlay is any technique used to display a video window on a computer display while bypassing the chain of CPU to graphics card to computer monitor.

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Video RAM (dual-ported DRAM)

Video RAM, or VRAM, is a dual-ported variant of dynamic RAM (DRAM), which was once commonly used to store the framebuffer in graphics adapters.

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VT220

The VT220 is an ANSI standard computer terminal introduced by Digital Equipment Corporation (DEC) in 1983.

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YPbPr

YPbPr or Y'PbPr, also written as, is a color space used in video electronics, in particular in reference to component video cables.

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ZSoft Corporation

ZSoft Corporation, founded by Mark Zachmann, was a Marietta, Georgia software company in the 1980s known for the PC Paintbrush software and its PCX graphic file format.

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32-bit

32-bit microcomputers are computers in which 32-bit microprocessors are the norm.

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8-bit color

8-bit color graphics is a method of storing image information in a computer's memory or in an image file, such that each pixel is represented by one 8-bit byte.

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Indexed color palette, Indexed colour, Indexed image, Indexed palette, Indexed-color, Named color.

References

[1] https://en.wikipedia.org/wiki/Indexed_color

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