Computer Vision Foundations · 免费预览
正交对与局部幅度
将一个滤波器与其九十度相位伙伴配对并对平方求和，得到局部幅度——这是一种极性不变的结构测量，双通道网络可一次完成计算。
1. The missing partner
The missing partner
2. Amplitude from two phases
Amplitude from two phases
3. Polarity stops mattering
Polarity stops mattering
4. A two-channel machine
A two-channel machine
5. Why the pair has no blind phase
A cosine-phase filter produces zero response on a stripe patch shifted a quarter cycle. How does adding the sine-phase partner fix this?
6. Amplitude on opposite edges
A bright-on-dark edge and a dark-on-bright edge pass through the same quadrature pair. Compare the linear responses and the local amplitudes.
7. Amplitude of a pair
A quadrature pair returns h = 3 and q = 4 at some position. Write the local amplitude a.