Face Detection and Tracking Using Live Video Acquisition - MATLAB ...
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Face Detection and Tracking Using Live Video Acquisition - MATLAB ...
Face Detection and Tracking Using Live Video Acquisition - MATLAB & Simulink Example.pdf. Face Detection and Trackin
Face Detection and Tracking Using Live Video Acquisition This example shows how to automatically detect and track a face in a live video stream, using the KLT algorithm.
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Overview Setup Detection and Tracking References
Overview Object detection and tracking are important in many computer vision applications including activity recognition, automotive safety, and surveillance. In this example you will develop a simple system for tracking a single face in a live video stream captured by a webcam. MATLAB provides webcam support through a Hardware Support Package, which you will need to download and install in order to run this example. The support package is available via the Support Package Installer. The face tracking system in this example can be in one of two modes: detection or tracking. In the detection mode the you can use a vision.CascadeObjectDetector object to detect a face in the current frame. If a face is detected, then you must detect corner points on the face, initialize a vision.PointTracker object, and then switch to the tracking mode. In the tracking mode, you must track the points using the point tracker. As you track the points, some of them will be lost because of occlusion. If the number of points being tracked falls below a threshold, that means that the face is no longer being tracked. You must then switch back to the detection mode to try to reacquire the face.
Setup Create objects for detecting faces, tracking points, acquiring and displaying video frames. % Create the face detector object. faceDetector = vision.CascadeObjectDetector(); % Create the point tracker object. pointTracker = vision.PointTracker('MaxBidirectionalError', 2); % Create the webcam object. cam = webcam(); % Capture one frame to get its size. videoFrame = snapshot(cam); frameSize = size(videoFrame); % Create the video player object. videoPlayer = vision.VideoPlayer('Position', [100 100 [frameSize(2), frameSize(1)]+30]);
Detection and Tracking Capture and process video frames from the webcam in a loop to detect and track a face. The loop will run for 400 frames or until the video player window is closed. runLoop = true; numPts = 0; frameCount = 0; while runLoop && frameCount