imresize is blurring my image!

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Michael
Michael 2013-2-20
Hello
I have a 128x128 matrix and I want to scale it down to 32x32. MATLAB's algorithm "imresize" seems to involve a smoothing filter. My original image has sharp gradients across pixel edges which will remain pixel edges in the new image, but these gradients are being lost by a seemingly overenthusiastic filtering step.
Is there a simple way of simply saying "see this 4x4 box? well that's going to be a single pixel in the new image, so take the mean of these 16 values and ignore everything else around it"?
I could try to code this manually but I'm checking that there isn't a quicker alternative, since it'll take me a while.
Regards, Michael

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Thorsten
Thorsten 2013-2-20
I = imresize(I, [32 32], 'nearest');
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Michael
Michael 2013-2-20
Perfect, thanks very much.

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