Computer Vision Foundations · 免费预览
高斯金字塔
用二项核递归模糊并抽取，构建出高斯金字塔——一组按几何级数缩小尺度的有效图像，可计算为一个望远镜式矩阵乘积。
1. Recursion with the binomial kernel
Recursion with the binomial kernel
2. The cascade as one matrix
The cascade as one matrix
3. Every level is a picture
Every level is a picture
4. What it costs and what it holds
What it costs and what it holds
5. Reading the recursion
In the Gaussian pyramid recursion g_{k+1} = D_k B_k g_k, what do B_k and D_k each do?
6. Why the cascade equals one wide blur
Why does g_3 = G_2 G_1 G_0 l equal a single convolution of l with a wide Gaussian?
7. The kernel's weight
Write the sum of the unnormalized binomial kernel [1 4 6 4 1].