MATLAB实时人脸识别与追踪

% 2018-01-03 created by 一湾清水
% 人脸识别
% 需要下载OS Generic Video Interface工具包
vidDevice = imaq.VideoDevice('winvideo', 1, 'MJPG_320x240', ...
                             'ROI', [1 1 320 240], ...
                             'ReturnedColorSpace', 'rgb', ...
                             'DeviceProperties.Brightness', 8, ...
                             'DeviceProperties.Sharpness', 8);
hVideoIn = vision.VideoPlayer;
hVideoIn.Name  = 'Input Video';
hVideoOut = vision.VideoPlayer;
hVideoOut.Name  = 'Output Video';
faceDetector = vision.CascadeObjectDetector();
pointTracker = vision.PointTracker('MaxBidirectionalError', 2);
numPts = 0;

while 1
    videoFrame = step(vidDevice);
    videoFrameOutput = videoFrame;
    videoFrameGray = rgb2gray(videoFrame);
    if numPts < 10
        % Detection mode.
        bbox = faceDetector.step(videoFrameGray);
        if ~isempty(bbox)
            % Find corner points inside the detected region.
            points = detectMinEigenFeatures(videoFrameGray, 'ROI', bbox(1, :));
            % Re-initialize the point tracker.
            xyPoints = points.Location;
            numPts = size(xyPoints,1);
            release(pointTracker);