It uses bitmap storage format and does not use any other compression except image depth, so BMP files take up a lot of space. The image depth of BMP file can be selected as lbit, 4bit, 8bit and 24bit. When data is stored in a BMP file, images are scanned from left to right and from bottom to top.
Because BMP file format is the standard for exchanging data related to drawings in Windows environment, all graphics and image software running in Windows environment supports BMP image format.
Extended data:
The steps of using ps to make the picture clearer are as follows:
1, open PS first, and then open the map.
2. After opening, copy the background copy layer, select the filter, sharpen and USM sharpen, set the value to 40%, set the radius to 1.5 pixels, set the threshold to 0 color scale, and click OK.
3. Then press CRL+F to execute the sharpening command three times, so that the picture will become clearer.
4. Then select the filter, liquefy it, and then find the distortion tool to modify the character's hair.
5. Finally, you can see the contrast picture of the picture, which solves the problem of using PS to make the picture clear.