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CvIntegral

Hello all! I have some questions about function cvIntegral(). 1. Why resulting integral image have size (source_width+1) x (source_height+1), but not source_width x source_height? 2. How integral image of colored image (3-channel) is calculating?

CvIntegral

Hello all! I have some questions about function cvIntegral(). 1. Why resulting integral image have size (source_width+1) x (source_height+1), but not source_width x source_height? source_height?
2. How integral image of colored image (3-channel) is calculating?

CvIntegral

Hello all! I have some questions about function cvIntegral(). cvIntegral().
1. Why resulting integral image have size (source_width+1) x (source_height+1), but not source_width x source_height?
2. How integral image of colored image (3-channel) is calculating?