Digital Imaging &
*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.