Opencv 17 face recognition

This routine uses namespaces using OpenCvSharp.Face;

The namespace is in sharp3 and sharp4 All versions exist

The program operation logic is as follows ：

1、 Read the directory and all the files , And complete the group marking of files according to the directory .

The directory name is the group tag

var groupId = int.Parse(dir.Name.Replace("s", string.Empty)) - 1;

2、 Create a face recognition model and start training

var model = FisherFaceRecognizer.Create();
            model.Train(images.Select(x => x.Image), images.Select(x => x.ImageGroupId));

among x => x.Image Belong to Lambda expression , It can be simply considered as linq Inquire about from in select Simplification of

3、 call Predict Face recognition

var predictedGroupId = model.Predict(testSample.Image);

complete .