Image Histogram

Reading

Spike at 0

Clipped shadows

Spike at 255

Blown highlights

Narrow

Low contrast

Shifted

Color cast

Bimodal

Strong fg/bg contrast

Luma

0.299R + 0.587G + 0.114B

Frequently Asked Questions

Bins?

256 bins per channel, one per byte value.

Common Use Cases

Exposure

Check clipping.

White balance

Compare R/G/B peaks.