What does 24-bit mean?

8 bits per channel × 3 channels (Red, Green, Blue) = 24 bits per pixel = 16,777,216 possible colors. This is the same color depth as JPG and standard PNG.

How does 24-bit BMP compare to PNG?

Both store 24-bit RGB data, but PNG uses lossless DEFLATE compression while BMP is uncompressed. A 640×480 BMP is ~900KB; the same as PNG would be ~200KB with identical quality.

24-bit BMP — True Color

Download a free 24-bit (true color) BMP at 640×480. The standard BMP format with 16.7 million colors — tests that your application renders full RGB color depth from uncompressed bitmap data.

sample-24bit.bmp

900 KB

640×480 · 24-bit · RGB

bmp

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