The BMP file format is capable of storing two-dimensional digital images in various color depths, and optionally with data compression, alpha channels, and color profiles. The Windows Metafile (WMF) specification covers the BMP file format.

With the help of free online image converter you can get the result you need – in available BMP format settings you can set up a color depth from 1 up to 32 bit and adjust additional conversion parameters for indexed colors (8 bit and less). BMP converter enables to convert various graphic formats, such as: JPG to BMP, PNG to BMP and others.

The following illustration shows a bitmap that stores colors directly (24 bits per pixel) rather than using a color table. The illustration also shows an enlarged view of the corresponding image. In the bitmap, FFFFFF represents white, FF0000 represents red, 00FF00 represents green, and 0000FF represents blue.

You can use BMP files with the WonderWitch, apparently, and while trying to do so, I decided it would be helpful to better understand the BMP file format. So, to start, I made a simple, 16x16, monochrome image, that looks like this.

All of the BMP versions originated on Intel-based machines and thus share a common little-endian heritage. The current BMP format is otherwise hardware-independent and can accommodate images with up to 32-bit color.

In all versions of BMP files starting with Version 3 (Win3x), the color entries occupy 4 bytes each so that they can be efficiently read and written as single 32-bit values. Taken as a single value, the four bytes are ordered as follows: [ZERO][RED][GREEN][BLUE].

A BMP color palette is an array of structures that specify the RGB intensity values of each colour in a display device’s colour palette. Each pixel in the bitmap data stores a single value used as an index into the colour palette.

2022年11月18日 · The Redbrick.bmp, mentioned in About Bitmaps, is a 32x32 bitmap with 16 colors; its color-index array is 32 * 32 * 4 = 4096 bits because four bits index 16 colors. To create a color-index array for a top-down bitmap, start at the top line in the bitmap.

This file format is the MS-Windows standard format. It holds black&white-, 16-color, 256-color and Truecolor images. The palletized 16-color and 256-color images may be compressed via run length encoding. Notice there is also a OS/2-BMP format.

BMP files always contain RGB data. The file can be: 1-bit: 2 colors (monochrome) 4-bit: 16 colors; 8-bit: 256 colors. 24-bit: 16777216 colors, mixes 256 tints of Red with 256 tints of Green and Blue; Windows versions 3.0 and later support run-length encoded (RLE) formats for compressing bitmaps that use 4 bits per pixel and 8 bits per pixel.