BMP stands for bitmap or bump file, is the native image format for storing raster and bitmapped image graphics specially designed to be compatible with DOS and Windows-based computers.bmp images are basically collections of bits (or pixels) that together to form a final image. BMP images are also called paint or raster images. Bitmap files are usually uncompressed that cannot be changed to reduce file size. Hence, they are much larger than the other compressed image file formats like JPEG or PNG etc.
Sometimes, it is also referred as a DIB which stands for device-independent bitmap that enables Windows to display the bitmap image on any display device. It means that the pixel color specified by the bitmap is in a form that is independent of the method used for representing the color on the display. The default filename extension of a Windows DIB file is .BMP.
A bitmap image is a grid- like format that is made of rows and columns where a specific cell is given a value that fills it in or leaves it blank, thus creating an image out of the data. It can be saved in several color options: 1-, 4-, 8- and 24-bit color and provides 2, 16, 256 and 16,000,000 colors respectively. BMP images can save a line art, photographs and digital paintings accurately.
File Extensions: .bmp or .dib
BMP File Structure:
A .bmp file contains of the following data structures:
The description of all these data structures are as explained below:
Uses of BMP:
Limitations of BMP:
BMP files are not used for transferring images on the Internet or other slow or capacity-limited media since they are very large and are not typically compressed. For example an 800x600 image occupies nearly 1.5 megabytes. Another disadvantage of bitmap images is that they require higher resolutions and anti-aliasing for a smooth appearance.
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