2D digital filtering
C = filter2(F,im)
imf
and the class double.filter2
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.
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