What is bit map? - Definition from WhatIs.com
Part of the Computing fundamentals glossary:

A bit map (often spelled "bitmap") defines a display space and the color for each pixel or "bit" in the display space. A Graphics Interchange Format and a JPEG are examples of graphic image file types that contain bit maps.

A bit map does not need to contain a bit of color-coded information for each pixel on every row. It only needs to contain information indicating a new color as the display scans along a row. Thus, an image with much solid color will tend to require a small bit map.

Because a bit map uses a fixed or raster graphics method of specifying an image, the image cannot be immediately rescaled by a user without losing definition. A vector graphics graphic image, however, is designed to be quickly rescaled. Typically, an image is created using vector graphics and then, when the artist is satisfied with the image, it is converted to (or saved as) a raster graphic file or bit map.

This was last updated in September 2005
Posted by: Margaret Rouse

Related Terms

Definitions

  • neural network

    - A neural network is a hardware and software system based on the operation of neurons in the human brain that can learn from and adapt to training and pattern recognition. (SearchNetworking.com)

  • bitwise

    - Bitwise operations manipulate data at the bit level rather than with bytes or larger units of data, as is more common. Most operators work with either single or multiple bytes, which in most system... (WhatIs.com)

  • slack space (file slack space)

    - Slack space is the difference between its logical and physical size. The logical size of a file is determined by the file’s actual size and is measured in bytes. The physical size of a file is dete... (WhatIs.com)

Glossaries

  • Computing fundamentals

    - Terms related to computer fundamentals, including computer hardware definitions and words and phrases about software, operating systems, peripherals and troubleshooting.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Ask Question

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.