Finding energy of a window with specified dimensions

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med-sweng
med-sweng 2013-1-30
I'm planning to do the following:
1- Slide a window with dimensions 4X4 on an image 2- For each window calculate the `energy` 3- Find the histogram
For sliding the window over an image, I know that we can use `nlfilter`, but this requires a `fun`. Will this function be the energy? How can I use this with `nlfiler`?
So, how do you think I can go with 1,2, and 3 in `matlab`?
Thanks.

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回答（1 个）

Matt J
Matt J 2013-1-30
Convolution might be enough if the energy is something like the sum of squares
e=ones(1,4);
Energy = conv2(e,e, Image.^2,'valid');
Then use HISTC or IMHIST to get the histogram...

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