What file is BMP?

Talking about BMP, perhaps we will not be unfamiliar, our computer stored in a lot of files are in this format, many friends may know that BMP is a graphic asking price, but what is the specific BMP file? Let's get to the next step.

　　What file is BMP?

BMP (full name bitmap) is a standard image file format in the Windows operating system and can be divided into two categories: device-related bitmaps (DDB) and device-independent bitmaps (DIB), which are very widely used. It uses bit-mapped storage format, in addition to image depth optional, no other compression, therefore, BMP files occupy a large space.

BMP file image depth can be selected Lbit, 4bit, 8bit and 24bit. BMP files when storing data, the image is scanned in the order from left to right, from bottom to top. Because the BMP file format is a standard for exchanging diagram-related data in a Windows environment, graphical image software running in a Windows environment supports BMP image formats.

　　A typical BMP image file consists of four parts:

1: Bitmap header file data structure, it contains BMP image file type, display content and other information;

2: Bitmap information data structure, it contains a BMP image of the wide, high, compression methods, as well as the definition of color and other information;

3: Palette, this part is optional, some bitmaps need palettes, some bitmaps, such as True Color map (24-bit BMP) do not need a palette;

4: Bitmap data, this part of the content according to the BMP bitmap used by the number of different digits, in the 24-bit diagram directly using RGB, while the other less than 24-bit using the color index of the palette.

　　How do I open a BMP file?

BMP is a hardware-independent image file format, so in almost all image software support BMP image format, and software can very quickly read BMP file format pictures, which is the advantage of BMP format pictures. Typical BMP image file consists of three parts: bitmap file header data structure, it contains BMP image file type, display content and other information, bitmap information data structure, it contains BMP image of the width, height, compression methods, and the definition of color and other information.

In the open BMP file, we recommend the use of the system's own drawing tools, picture viewing tools, PS software, the United States Mito can be opened, in short, all the current mainstream picture viewing tools can open BMP picture files.

Note: BMP format pictures than the common JPG, Gif, PNG and other format of the picture occupies a large space, so the relative use of less now.