What is the difference between Convolution and Correlation?(a) Image is pre-rotated by 180 degree for Correlation(b) Image is pre-rotated by 180 degree for Convolution(c) Image is pre-rotated by 90 degree for Correlation(d) Image is pre-rotated by 90 degree for ConvolutionThe question was asked during an interview.The above asked question is from Fundamentals of Spatial Filtering in chapter Intensity Transformations and Spatial Filtering of Digital Image Processing

What is the difference between Convolution and Correlation?(a) Image i

1.	What is the difference between Convolution and Correlation?(a) Image is pre-rotated by 180 degree for Correlation(b) Image is pre-rotated by 180 degree for Convolution(c) Image is pre-rotated by 90 degree for Correlation(d) Image is pre-rotated by 90 degree for ConvolutionThe question was asked during an interview.The above asked question is from Fundamentals of Spatial Filtering in chapter Intensity Transformations and Spatial Filtering of Digital Image Processing
Answer» The CORRECT choice is (b) IMAGE is pre-ROTATED by 180 degree for CONVOLUTION To explain: Convolution is the same as Correlation except that the image must be rotated by 180 degrees INITIALLY.

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