Image filtering
imf = imfilter(im, F)
im
.imfilter
filters an image im
with filter F
.
When im
is a mult-channel image, each channel can be filtered with F
seperately.
Input image pixel values outside the bounds of the image are assumed to
equal the nearest array border value.
The only diffence of filter2
with imfilter
is
the output of filter2
is double matrix,
and the output of imfilter
has the same type as input
and the elements in the output matrix that
exceed the range of the integer type will be truncated.
http://sivp.sf.net