Digital Imaging & the Histogram

Photo Fundamentals

*Histogram is a map of pixels on a scale from pure black to pure white.

*Shows the brightness/darkness of each pixel represented on this scale and how many of these pixels are in each zone.

*Left represents the black/Dark end. Right represents the white/Bright end and the middle is perfect middle Gray.

It acts as a graphical representation of the tonal distribution in a digital

image.

It plots the number of pixels for each tonal value.

By looking at the histogram for a specific image a viewer will be able to judge the entire tonal distribution

at a glance.

0 is Pure Black 255 is Pure White

Underexposed

Perfect Exposure

Over Exposed

Extra Over

Exposed