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Ensemble Machine Learning by Ankit Dixit

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Integral image

Integral images are those images in which the pixel value at any (x,y) location is the sum of the all pixel values present before the current pixel. Its use can be understood by the following example:

        
Figure 5.25: Image on the left and its integral image on the right

Let's see how this concept can help reduce computation time; let us assume a matrix A of size 5x5 representing an image, as shown here:

Figure 5.26: Example ...

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