How would I vectorise this code

2020 3 6
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更新时间：2020 3 6
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tempSum = 0;
for m = topLeft(2) : topLeft(2) + widthhight(2) -8
for n = topLeft(1) : topLeft(1) + widthhight(1) -8
for x = 0 : 8
for y = 0 : 8
tempSum = tempSum + double(double(i(n+y,m+x)) * kernel(y+1,x+1));
end
end
result(n + 4,m + 4) = tempSum/81;
tempSum=0;
end
end

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Walter Roberson
Walter Roberson 2020-3-6
conv2() some subset of i with kernel as being the thing to convolve with. Use the 'valid' option, I suspect.
Josh Webb
Josh Webb 2020-3-6
Thank you, a lot faster now. I knew about conv2 but didn't know about the "valid" argument

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