ismooth

Gaussian smoothing

out = ismooth(im, sigma) is the image im after convolution with a Gaussian kernel of standard deviation sigma.

out = ismooth(im, sigma, options) as above but the options are passed to CONV2.

Options

'full'	returns the full 2-D convolution (default)
'same'	returns OUT the same size as IM
'valid'	returns the valid pixels only, those where the kernel does not exceed the bounds of the image.

By default (option 'full') the returned image is larger than the passed image.
Smooths all planes of the input image.
The Gaussian kernel has a unit volume.
If input image is integer it is converted to float, convolved, then converted back to integer.