Introduction - If you have any usage issues, please Google them yourself
ch10_1_1: Image filtering using function imfilter ch10_2_1: the use of frequency transformation method to generate a 2-D filter ch10_2_2: frequency sampling method to generate a 2-D filter ch10_2_3: window method to generate a 2-D filter (ch10_2_4: Design a 0.5 is an ideal low-pass filter cutoff frequency