segmentation / ivote3

Authored by Laila Saadatifard 2015-10-09 09:47:20 -0500

1 parent da849ea2

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matlab-3d/blue.bmp 0 → 100644

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matlab-3d/gauss1d.m 0 → 100644

		1	+%This function creates a 1D gaussian window given a standard deviation
		2	+
		3	+function G = gauss1d(sigma)
		4	+
		5	+
		6	+ % create a kernel with a radius equal to 4x sigma
		7	+ r = sigma * 4;
		8	+
		9	+ % create the domain of the gaussian function (x and y)
		10	+ gx = -r:r;
		11	+ % calculate the gaussian function
		12	+ a = 1/(sqrt(2pi)sigma);
		13	+ b = -1/(2*sigma^2);
		14	+ cx = gx.^2;
		15	+ G = a.exp(b.cx);
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matlab-3d/gauss_blur3d.m 0 → 100644

		1	+function Ib = gauss_blur3d(I, sigma)
		2	+
		3	+
		4	+%convolve along the x-axis
		5	+Gx = gauss1d(sigma(1));
		6	+Ix = convn(I, Gx, 'same');
		7	+
		8	+%convolve along the y-axis
		9	+Gy = gauss1d(sigma(2))';
		10	+Iy = convn(Ix, Gy, 'same');
		11	+
		12	+%convolve along the z-axis
		13	+Gz_prime = gauss1d(sigma(3));
		14	+Gz = reshape(Gz_prime, [1, 1, length(Gz_prime)]);
		15	+Iz = convn(Iy, Gz, 'same');
		16	+
		17	+Ib = Iz;
		18	+
		19	+