bitmap

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bitmap

Computing
a picture created on a visual display unit where each pixel corresponds to one or more bits in memory, the number of bits per pixel determining the number of available colours

bitmap

(graphics, file format)
A data file or structure which corresponds bit for bit with an image displayed on a screen, probably in the same format as it would be stored in the display's video memory or maybe as a device independent bitmap. A bitmap is characterised by the width and height of the image in pixels and the number of bits per pixel which determines the number of shades of grey or colours it can represent. A bitmap representing a coloured image (a "pixmap") will usually have pixels with between one and eight bits for each of the red, green, and blue components, though other colour encodings are also used. The green component sometimes has more bits that the other two to cater for the human eye's greater discrimination in this component.

See also vector graphics, image formats.

bitmap

A binary representation in which a bit or set of bits corresponds to some part of an object such as an image or font. For example, in monochrome systems, one bit represents one pixel on screen. For gray scale or color, several bits in the bitmap represent one pixel. The term may refer to the image itself or to the memory area that holds the bits that represent the image. See pixel.

Graphics and Tables
A bitmap is usually associated with graphics, in which the bits are a direct representation of the pixels in the image. However, bitmaps can be used as tables to represent and keep track of anything, where each set of bits is assigned a value or condition. See bitmapped graphics. For graphics fundamentals, see graphics.


A Monochrome Bitmap
The left half of this diagram shows the bits in the bitmap, and the right half depicts what would show on screen. In monochrome systems, one bit is used to represent one pixel. Images that are scanned into the computer are turned into bitmaps, and bitmaps can be created in a paint program.
References in periodicals archive ?
Also, our scheme can update the routing table faster than any other prefix caching schemes owing to no additional prefixes and less update overhead of bitmaps in the routing table.
Each bitmap file contains a bitmap-file header, a bitmap-information header, a color table, and an array of bytes that defines the bitmap bits.
a creator and publisher of mobile entertainment, has announced a licensing agreement with UK developers The Bitmap Brothers.
ASCII text can be edited and reformatted in a word processor or publishing package, while bitmaps of text cannot be manipulated.
I've had varying degrees of success rising this trace feature with a variety of bitmaps taken from the Web or from my scanner.
Based on TrueType([R]) and OpenType([R]) industry-standard font formats, the iType font engine also supports custom typefaces, bitmaps, embedded bitmaps and font subsets.
Monotype Imaging's patent-pending technique for enabling the clear display of scalable East Asian characters without bitmaps involves a new method of character fine-tuning - or hinting - to ensure the on-screen legibility of text from 14 to 50 pixels per em.
With enhancements to Import/Export filters, Unicode text support, Corel PowerTRACE(R) (which enables users to quickly and easily convert bitmaps into editable vector graphics), Interactive tools, and much more, this free update is now available to download for all other languages from Corel websites globally.
In addition to the new 3D-import capabilities, the suite includes Corel DESIGNER 12 for precise technical illustration and layout; Corel PHOTO-PAINT(R) 12 for professional image editing; CorelTRACE(TM) 12 to convert bitmaps and legacy paper documents into vector graphics; and Corel CAPTURE(TM) 12 to create screen captures, an integral component of many technical documents.
Available as an SDK (Software Developers' Kit), Font Fusion renders a wide variety of industry-standard and compact font formats: OpenType, TrueType, Type 1, CFF/Type2, T2K(R) Latin, T2K Asian, TrueDoc(R) PFR (portable font resource), Bitstream Speedo(R), Font Fusion stroke (FFS), BDF (bitmap distribution format) format, as well as embedded bitmaps.
New Corel(R) PowerTRACE - Integrated into CorelDRAW X3, Corel(R) PowerTRACE enables users to quickly and easily convert bitmaps into editable vector graphics.
User-defined bitmaps via standard desktop tools provide a modern looking interface and include tabbed document interface pages and many different types of controls, such as radio buttons and check boxes.