Tuesday, 10 January 2012

Histogram

A histogram is a useful indicator of how a picture looks technically.

The histogram shows the distribution of pixel values over a range.  Each pixel has a luminance (brightness) value ranging from 0-255 - Black to white.  The histogram shows how many pixels in our image are black, grey or white.

The Brightness Scale

Lighter images like snow scenes move the graph to the right and darker scenes to the left. 


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