Bmap file format

The BMP file format can store data as two-dimensional digital images in both monochrome as well as color format with various colour depths. Device Independent Bitmaps act as an aid to exchanging bitmaps between devices and applications.

Due to the continuous evolution of this file format, the information contained in the headers can be different as per the version of Bitmap. A single bitmap file consists of fixed as well as variable-size structures in a specific sequence. The File header is not part of this data structure.

The color can also consist of bit entries that constitute indexes to the curently referenced palette instead of explicit RGB color definitions. Lets have a look at some of these in detail, especially the headers. A Bitmap File Header is similar to other file headers used to identify the file.

All integer values are stored in little-endian format. The detailed information about the image is represented by this header. Based on this information, application will be determined that will be used to display the image on the screen. All such headers contain a DWORD bit field, specifying their size, so that an application can easily determine the header used int he image. This is basically due to the fact that the DIB format underwent several extensions.

Following is the DIB Header with listed fields. Each pixel in the bitmap data stores a single value used as an index into the colour palette. For example, if the first byte in the bitmap is 1Fh, the byte represents two pixels. The first pixel contains the color in the second palette entry, and the second pixel contains the color in the sixteenth palette entry. The bitmap has a maximum of colors, and the palette contains up to entries.

In this case, each byte in the array represents a single pixel. Each word in the bitmap array represents a single pixel. The relative intensities of red, green, and blue are represented with 5 bits for each color component.

The value for blue is in the least significant 5 bits, followed by 5 bits each for green and red, respectively. The most significant bit is not used. Each 2 bytes in the bitmap array represents a single pixel. Each 3-byte triplet in the bitmap array represents the relative intensities of blue, green, and red, respectively, for a pixel. Read this post now! How to convert BMP files? If not, you can try the following online BMP file converters.

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