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How to know the detected face is of which frame in a matlab code of face detection and how to save first and last frame.

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Neelum Dave 2015-12-18

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https://ww2.mathworks.cn/matlabcentral/answers/260857-how-to-know-the-detected-face-is-of-which-frame-in-a-matlab-code-of-face-detection-and-how-to-save-f

回答： Dima Lisin 2015-12-18

videoFileReader = vision.VideoFileReader('h1.avi'); videoFrame = step(videoFileReader); figure, imshow(videoFrame) faceDetector = vision.CascadeObjectDetector; bbox = step(faceDetector, videoFrame); videoOut = insertObjectAnnotation(videoFrame,'rectangle',bbox,'Face'); figure, imshow(videoOut), title('Detected face')

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Dima Lisin 2015-12-18

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Use an if statement to check if bbox is empty. If it is empty, then no face is detected. If not, then a face is detected.

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Image Processing and Computer Vision Computer Vision Toolbox Recognition, Object Detection, and Semantic Segmentation Object Detection Using Features Face Detection

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