Description
Frequency Domain Filtering
1. Implement the Sobel filter to the input images Q3_1.tif in both spatial domain and
frequency domain. Compare the results. Refer to slides 78 to 81 of Lecture 3.
File name: Sobel_学号.m
2. Implement the Gaussian low pass and high pass to the input image Q3_2.tif.
Compare the results for ܦ ൌ 30, 60, and 160, respectively. Create function
Gaussian_学号 with parameter D0
File name: Gaussian_学号.m
3. Implement the Butterworth notch filters to the input images Q3_3.tif. Refer to slides
110 to 114 of Lecture 3. .
File name: Butterworth_学号.m
Discuss the following, but NOT limited to the following:
Explain why perform a shift in Step 4 on slide 81 of Lecture 3 in the first Exercise.
Discuss the effect of ܦ in Gaussian lowpass and highpass filter, and the general guideline
of the choice of ܦ for different applications.
Discuss in the above question 3, how the parameters in the notch filters are selected, and why.
Send your codes and report to
11749181@mail.sustc.edu.cn 助教马定妃
Image files are named accordingly.