J = VL_IMSMOOTH(I,SIGMA) convolves the image I by an isotropic Gaussian kernel of standard deviation SIGMA. I must be an array of doubles. IF the array is three dimensional, the third dimension is assumed to span different channels (e.g. R,G,B). In this case, each channel is convolved independently.

VL_IMSMOOTH() accepts the following options:

Kernel

Selects between GAUSSIAN and TRIANGULAR kernels. The triangular kernel support has 2*SIGMA-1 sampels. Kernels have unit mass.