Consider a continuous imagep[i,j] and a continuous filterf[n,m] In the continuous domain, the operationf⊗pof convolving an image with the filter is defined as
∞∞
f⊗p=
−∞ −∞
p[i−m,n−j]f[n,m]dndm.
Now consider two filtersfandg. Prove that convolving the image first withfand then withghas the same effect as convolvingfwithgand then convolving the image with the result. In other words:
g⊗(f⊗p) = (g⊗f)⊗p.
Does this result extend to discrete images?
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