week 3 (fourier) Flashcards
1
Q
what is fourier addition?
A
making changes in fourier space and then returning to regular space
2
Q
what is high pass filtering?
A
removing low frequencies in fourier space
3
Q
what is low pass filtering?
A
removing high frequencies in fourier space
4
Q
how does fourier series 2D work?
A
- all images are made of sine waves, they are like a base set for constructing all images
- each image is made up of the sum of sine waves of different frequencies and different orientations
- images can therefore also be filtered using high pass filtering and low pass filtering
