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原创 PCA EigenFace的一些注意点

reference:http://laid.delanover.com/explanation-face-recognition-using-eigenfaces/https://www.learnopencv.com/eigenface-using-opencv-c-python/http://jmcspot.com/Eigenface/问题1：What is Eigenfa...

2019-04-12 23:45:07 1057

转载：https://blog.youkuaiyun.com/phker/article/details/48468591https://blog.youkuaiyun.com/u012554092/article/details/78290223How a Kalman filter works, in pictures必看！公式全齐了https://www.bzarg.com/p/how-a-kal...

2019-04-11 15:48:47 307

转载 Hidden Markov Models

转载：https://www.cnblogs.com/skyme/p/4651331.htmlhttps://www.zhihu.com/question/20962240An Introduction to Hidden Markov Models and Bayesian Networks byZOUBIN GHAHRAMANIHMM（隐马尔可夫模型）Hidden Mar...

2019-04-10 01:29:06 456

转载 HOG(Histogram of Oriented gradients) feature extraction

转载https://blog.youkuaiyun.com/liulina603/article/details/82910931、HOG特征：方向梯度直方图（Histogram of Oriented Gradient, HOG）特征是一种在计算机视觉和图像处理中用来进行物体检测的特征描述子。它通过计算和统计图像局部区域的梯度方向直方图来构成特征。Hog特征结合SVM分类器已经被广...

2019-04-06 21:32:13 806

转载 Stereo Vision 世界坐标系、相机坐标系、图像坐标系、像素坐标系

【相机标定】四个坐标系之间的变换关系https://blog.youkuaiyun.com/lyl771857509/article/details/79633412https://blog.youkuaiyun.com/u011574296/article/details/73658560

2019-03-31 22:43:36 249

转载图像学习 - Histogram of Gradient (HOG, 方向梯度直方图) 特征

作者：Slyne_D链接：https://www.jianshu.com/p/395f0582c5f7来源：简书特征描述子(Feature Descriptor)特征描述子就是图像的表示，抽取了有用的信息丢掉了不相关的信息。通常特征描述子会把一个w*h*3(宽*高*3，3个channel)的图像转换成一个长度为n的向量/矩阵。比如一副64*128*3的图像，经过转换后输出的图像向...

2019-03-26 09:08:09 1050

转载 R gsub Function

原文链接http://www.endmemo.com/program/R/gsub.phpgsub()function replaces all matches of a string, if the parameter is a string vector, returns a string vector of the same length and with the same att...

2019-03-15 17:24:24 286

转载 tidyr - gather() and spread()

Gather And Spread: Using the tidyverse to go between wide and longThe problemFrequently data you receive or create will be in formats that are unsuitable for analysis as they stand and require mod...

2019-03-13 20:40:49 604

转载 python: openCV Arithmetic Operations on Images

此处参考引用到知乎博文 - python openCV掩膜的通俗理解https://zhuanlan.zhihu.com/p/36656952Image Addtion使用cv2.add()将两幅图像进行加法运算，也可以直接使用numpy，res=img1+img2.两幅图像的大小，类型必须一致，或者第二个图像可以是一个简单的标量值。openCV的加法是一种饱和操作，而numpy的加法...

2019-02-23 21:05:59 156

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