如何使用OpenCV面部识别？ [英] How to do Face Recognition using OpenCV?

问题描述

我试图做一些面部识别（不是检测）东西使用OpenCV。我在这篇文章中找到了一些代码：

I am trying to do some Face Recognition (not detection) stuff using OpenCV. I found this article with some code:

http://www.cognotics.com/opencv/servo_2007_series/index.html

但是，此代码使用较旧的C样式OpenCV API。有人有一个C ++ API版本的这个使用更新的版本，如OpenCV 2.3.1？

However, this code is written using the older C-style OpenCV API. Does someone have a C++ API version of this using a more recent version like OpenCV 2.3.1?

推荐答案

面部识别项目为我的工程师学位，使用c ++ api。我认为关于c ++中面部识别的一切都是相当简单的，甚至比C（更少的指针）更简单。要使用PCA，您需要一个名为PCA的类，此处 a>。只要使用正确的方法和阅读文档与理解。要构建具有输入数据的矩阵，我创建了一个适当大小的矩阵，然后将图片作为行（使用方法重塑）到它（在cv :: Mat中有一个方法，使您可以轻松地获取一行矩阵）。您只需要确保基本数据和测试数据具有相同的参数（渠道，大小等）。

I'm doing a face recognition project for my engineer's degree, using c++ api. I think that everything regarding face recognition in c++ is fairly straightforward, even simpler than in C (less pointers). To use PCA you have a class named PCA described here. Just use the proper methods and read documentation with understanding. To build the matrix with input data I've created a matrix of proper size, then pasted pictures as rows (use method reshape) into it (there is a method in cv::Mat that lets you to get easily a row of a matrix). You just need to keep sure that base data and tested data have the same parameters (channels, size,etc.)

编辑： p>

     using namespace cv; //somewhere near top

将数据插入数据矩阵：

    62       Mat reshaped=img.reshape(1,1);
    63       Mat dataRow=_data.row(y++);
    64       resize(reshaped,dataRow,dataRow.size(),0,0,CV_INTER_LINEAR);

计算pca：

    251 _pca(_data,Mat(),CV_PCA_DATA_AS_ROW); //compute pca 
    252 _pca.project(_data,_vectors); // project original data to new coordinates

由于opencv的文档不是最好的，不想花一些时间阅读它。大多数c api函数在c ++ api中有等价的，你只需要做一些写入搜索窗口并按回车搜索。而且，在c ++中还有一些教程来抓住c ++ api。

As opencv's documentation isn't the best out there, it doesn't hurt to spend some time reading it. Most of the c api functions have their equivalents in c++ api, You only need to do some "write into search window and hit enter" searching. And, there are also tutorials in c++ to get a grip of the c++ api.

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