A bitmap may refer to any of the following:
1. A graphic file format with the file extensions of *.bmp or *.dib (device-independent bitmap) used in Microsoft Windows and OS/2. Bitmap images can be saved as either 4-bit (16 colors), 9-bit (256 colors), 16-bit (65,536 colors), or 24-bit (16.7 million colors) and saved as uncompressed images. Because of their larger file size when compared to other images formats, bmp and dib images are not commonly used or recommended outside of the Microsoft Windows environment. If shown, the picture is an example of a bitmap image.
How to create or open a bitmap or .bmp image?
2. A bitmap is also used to describe raster or bitmapped image formats.