What is a bitmap picture?
A bitmap is one of the many types of file formats for images stored in computer form. It carries the extension .BMP . Computers use bits from 1 and 0 to store data. Bitmap is literally a map of bits that form a specific image when plotting on the display as a computer monitor.
To understand how the bitmap image is displayed, it is important to understand the computer screen. The display consists of rows and columns of small blocks or pixels . In the Bitmap picture, at least one bit is assigned to each pixel to indicate whether the pixel should reflect the background color, the foreground color or the other color.
In the case of black and white text, let's look at a single letter. Many pixels that make up this letter require only one piece of data. Either the pixel will be black or white: 1 or 0.
When the bitmap displays a color picture like the lake scene, there are north shades of gradation in colors and lighting. In this case canhave each pixel in Bitmapa 16, 24 or 48 bits of information with it. The more bits, the greater the bitmap resolution - and the larger the set.
Because bitmaps store so much information in the highest resolutions, creating very beautiful pictures. However, the picture of the bitmap is not well returned. If it is thrown into the air using the graphics program, the bitmap picture is blocked and blurred. If it decreases, it loses clarity.
Compression techniques are used to reduce the size of the bitmap file while maintaining as much data as necessary to render a good image. One such format is the 8 -bit .gif format, which uses a palette of 256 colors. The advantage of compressed thenevhoda is that it cannot faithfully reproduce images containing more than 256 colors.
photos stored in bitmap format that need to be reduced for the use of the Internet can be converted to JPEG format (Jay-PEG) . Although it is a loss of compression , it is able to display more than 256 colors and does a better job in rendering photos.
Since the pictures of bitmaps are created by pixel-Po pixel, they can be easily adjusted. The Bitmap image in any graphics program allows the user to add, remove or change the color of the individual pixels. For this reason, logos, favicons and icons are often built in bitmaps format.