| image-convolution [message #83483] |
Thu, 07 March 2013 23:27 |
TERRAX
Messages: 1
Registered: March 2013
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Junior Member |
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hello, idl-community. i (a IDL-beginner) have a problem with the creation of a window function for image processing. after many hours of tinkering, these problem-developed into a real nightmare for me. maybe you can help me.
context is the processing of a multi-spectral image. for example 250 x 250 pixels and 5 bands. on this image, i want implement the following function for an image-convolution :
c[i] = 0.25*n-1[i] + 0.5*n[i] + 0.25*n+1[i]
c [i] forms the value at pixel i in the smoothed image band.
n [i] is the original pixel values of the input image in band n.
n-1[i] is the corresponding pixel in the input band n-1 and n+1[i] is the corresponding pixel in the input band n+1.
the neighbors for smoothing are therefore the corresponding pixels of the adjacent bands.
for the implementation i took the Convol function and loops, but I failed miserably. I can idl not teach, that for convolution the same pixel from the adjacent bands to be used.
knows anyone a solution for this problem or could give tips or help.
many thanks in advance for your efforts.
best regards
alex
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