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[37] | 1 | % By Philip Torr 2002
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| 2 | % copyright Microsoft Corp.
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| 3 | % %
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| 4 | % % HISTORY
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| 5 | % 2001 Philip Torr (philtorr@microsoft.com, phst@robots.ac.uk) at Microsoft
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| 6 | % Created.
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| 7 | %
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| 8 | % Copyright © Microsoft Corp. 2002
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| 9 | %
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| 10 | %
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| 11 | % Returns a W x W matrix with a unit amplitude Gaussian function of
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| 12 | % standard deviation SIGMA. The Gaussian is centered within the matrix.
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| 13 | %
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| 14 | function gmask = gauss_mask(w, sigma)
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| 15 |
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| 16 | ww = 2*w + 1;
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| 17 |
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| 18 | [x,y] = meshgrid(-w:w, -w:w);
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| 19 |
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| 20 | gmask = 1/(2*pi) * exp( -(x.^2 + y.^2)/2/sigma^2);
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| 21 |
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| 22 | gmask = gmask / sum(sum(gmask));
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