03/13/2003
15-462 Graphics I
33
Filtering and Convolution
•Image
transformation at pixel level
•Represent
N £ M image as matrix A = [aik]
•Process
each color component separately
•Linear
filter produces matrix B = [bik] with
•B
is the result of convolving
A with filter H
•Represent
H by n £ m convolution matrix
