7*7 average
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How can we find average of matrix, considering a 7 by 7 matrix in an image????
1 个评论
Guillaume
2019-1-29
You'll have to be clearer about what you want. Providing an example of input and desired output really helps. What does considering a 7 by 7 matrix in an image mean?
回答（1 个）
If you want a 7x7 sliding window, you would use convolution
out=conv2(yourImage,ones(7)/49,'valid');
If instead you want to decompose your image into non-overlapping 7x7 tiles, then I would recommend sepblockfun (Download).
out=sepblockfun(yourImage,[7,7],'mean');
4 个评论
Walter Roberson
2019-1-29
filter2 can be used instead of conv2. There are some differences in internal optimization in some cases. conv2 flips the mask compared to filter2 .
viswanath reddy
2019-1-30
i want to calculate mean for every pixel by moving the mask throughout the image starting as shown
Matt J
2019-1-30
OK. But your question has already been answered (so please Accept-click).
Guillaume
2019-1-30
As Matt wrote, "If you want a 7x7 sliding window, you would use convolution" and he gave you the code.
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2019-1-29
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