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Bitdepth

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Bitdepth

Bitdepth refers to the number of colors possible with each pixel.

Common Bitdepths:

• 1-bit: Black and white image
• 4-bit: Grayscale image or 16 color paletted
• 8-bit: 256 color paletted image
• 16-bit: RGB 5-6-5 format or RGBA 5-5-5-1 unpaletted
• 24-bit: RGB 8-8-8 format
• 32-bit: RGB 8-8-8 or RGBA 8-8-8-8

Note: 32-bit with RGB channels is often used instead of 24-bit color (even though eight bits are wasted) because 32-bit images are easier to process since each pixel falls on even memory boundaries, so it is easier to use special CPU or GPU features, such as  ?SIMD
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