As the color depth increases, so too does the size of the bitmap, even though the dimensions of the picture do not change. Typical file extensions for BMPs are .bmp. It is hard to point out any benefit in using a bitmap image except that you can determine the range of colors used and retain all of the original image quality. Small bitmaps are used for icons and images that need to be loaded quickly. Bitmaps are load ed quickly into video memory and displayed quickly because there is no decoding involved in the display of these files.
Information exists for every pixel.
Disadvantages of Bitmaps Bitmaps are relatively ungainly and resize fairly poorly. They do not adjust easily to resizing and editing because of their strict pixel by pixel nature. Thus they do not work well in elaborate drawing or painting packages. Because Bitmaps are a simple format with no compression, they are easily converted to every other significant format. Similarly, most formats can be saved as Bitmaps.