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CS131 #20

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maiff opened this issue Feb 12, 2020 · 0 comments
Open

CS131 #20

maiff opened this issue Feb 12, 2020 · 0 comments

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@maiff
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maiff commented Feb 12, 2020

1

  1. image as function
  2. conv的不同算法
  3. RANSAC and Harris corner detection

harris https://blog.csdn.net/zizi7/article/details/50112169

sift https://www.cnblogs.com/Alliswell-WP/p/SIFT.html
hog https://shartoo.github.io/2019/03/04/HOG-feature/
Seam-Carving
huofu变换
提取直线可以用这些

mean-shift
在未被标记的数据点中随机选择一个点作为起始中心点center;
找出以center为中心半径为radius的区域中出现的所有数据点,认为这些点同属于一个聚类C。同时在该聚类中记录数据点出现的次数加1。
以center为中心点,计算从center开始到集合M中每个元素的向量,将这些向量相加,得到向量shift。
center = center + shift。即center沿着shift的方向移动,移动距离是||shift||。
重复步骤2、3、4,直到shift的很小(就是迭代到收敛),记住此时的center。注意,这个迭代过程中遇到的点都应该归类到簇C。
如果收敛时当前簇C的center与其它已经存在的簇C2中心的距离小于阈值,那么把C2和C合并,数据点出现次数也对应合并。否则,把C作为新的聚类。
重复1、2、3、4、5直到所有的点都被标记为已访问。
分类:根据每个类,对每个点的访问频率,取访问频率最大的那个类,作为当前点集的所属类。

@github-staff github-staff deleted a comment from fekusatech May 27, 2024
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