Internal Images Basic Concept

Posted on November 30, 2010 by

 

At each pixel (x,y), calculate sum of the rectangle [(0, 0), (x, y)]  by using the following formulas

 

Integral Image I_{\Sigma}(X) at location X=(x,y)^T

I_{\Sigma}(X) = \sum_{i=0}^{i <= x}\sum_{j=0}^{j <= y} I(i, j)

 

 

Suppose we want to find sum in D in the picture

D = (A+B+C+D) – (A+C) – (A+B) – A

 

 

ref : cornell

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One Response to Internal Images Basic Concept

  1. Pingback: Scale Space Pyramid « :: uisp :: dsin ::

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