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 ?
With the access schema, bitmap indexing is performed on an attribute which occurs redundantly in the relationship based collection and result of a query is stored in an array and displayed as a subset of the large dataset.
The bitmap-file header contains some information about the bitmap file (about the file, not about the bitmap itself) such as type, size of file, and layout of a device-independent bitmap file.
Once converted, the text files for an entire page are significantly smaller, about 25 times smaller than one page of bitmap information.
Any LightWave 3D bitmap can become an organic transition when using GeniePlus's linear key
The role of a scanner is to convert a hard copy into a bitmap image.
NEW to CorelCAPTURE is the ability to capture rectangular, elliptical or freehand areas, the ability to assign an activation "hot key" to begin the capture and the ability to save bitmap files directly to a file or the printer.
Bitmap fonts are typically customized for every handset model within a manufacturer's product line.
CHICAGO -- BiTmaP, the nation's only accredited, tuition-free bioinformatics training program, today announced the graduation of its first class.
Ideal for customers in aerospace, defense, automotive, and manufacturing, Corel DESIGNER Professional 12 provides a seamless workflow for technical illustrators who need to import specialized 3D CAD files for creating 2D vector and bitmap drawings.
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 Crop tool - A significant time-saver, the new Crop tool quickly lets users remove unwanted areas in objects and imported graphics -- whether they are working with bitmap or vector graphics.