DIP Lecture 8: Frequency domain filtering; sampling and aliasing

Описание: ECSE-4540 Intro to Digital Image Processing
Rich Radke, Rensselaer Polytechnic Institute
Lecture 8: Frequency domain filtering; sampling and aliasing (2/26/15)

0:00:28 Frequency-domain filtering
0:03:45 Revisiting the frequency domain of a natural image
0:08:47 Ideal (box) filtering in the frequency domain
0:10:47 Ringing artifacts
0:11:45 Boxes, pulse trains, and sinc functions
0:14:17 Making a bigger box filter
0:16:41 Circular (instead of rectangular) filters
0:20:20 Spatial vs. frequency domain tradeoffs
0:22:35 Looking at filters in the frequency domain
0:25:25 Gaussian low-pass filters
0:33:28 Highpass filtering
0:43:14 Laplacian filters
0:47:35 Sampling and aliasing
0:51:08 Anti-aliasing
1:02:48 Moire patterns

Follows Sections 4.7-4.9, 4.11 of the textbook (Gonzalez and Woods, 3rd ed.).