BMP file format
![Diagram 1 – The structure of the bitmap image file](/Images/godic/202501/08/BMPfileFormat5217.png")
![Diag. 2 – The BITFIELDS mechanism for a 32-bit pixel depicted in RGBAX sample length notation](/Images/godic/202501/08/BitfieldsSLN5218.png")
![Diag. 3 – The pixel format with an alpha channel for a 16-bit pixel (in RGBAX sample Length notation) actually generated by Adobe Photoshop[17]](/Images/godic/202501/08/SLNotation444405218.png")
![All of the possible pixel formats in a DIB](/Images/godic/202501/08/AllBMPformats5218.png")
The BMP file format, also known as bitmap image file or device independent bitmap (DIB) file format or simply a bitmap, is a raster graphics image file format used to store bitmap digital images, independently of the display device (such as a graphics adapter), especially on Microsoft Windows and OS/2 operating systems.