Summed Area Table (Paperback)

High Quality Content by WIKIPEDIA articles! A summed area table (also known as an integral image) is an algorithm for quickly and efficiently generating the sum of values in a rectangular subset of a grid. It was first introduced to the computer graphics world in 1984 for use in mipmaps but wasn't widely used in the computer vision community until its prominent use in the Viola-Jones object detection framework twenty years later.