Face Detection bad accuracy
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Mohammed Hagras el 27 de Nov. de 2015
I am trying to make a face detection app. I have followed the example of vision.CascadeObjectDetector as done in the example (<http://www.mathworks.com/help/vision/examples/face-detection-and-tracking-using-camshift.html)>. Unfortunatelly the accuracy is not good enough it detects some background or objrcts as faces. How can I improve it ?
Dima Lisin el 30 de Nov. de 2015
There are several options in the vision.CascadeObjectDetector that you can tweak. If you know how large you expect the faces to be in your images, you can set MinSize and MaxSize to eliminate the false detections that are too small or too big to be a face. You can also try increasing MergeThreshold, or set an ROI (region of interest) to exclude the parts of the image where you do not expect to see any faces at all.
Alternatively, you can also try using a different model: Frontal Face (LBP) instead of the default Frontal Face (CART). You can also try detecting the upper bodies, using the Upper Body model, and then detect the faces inside the resulting bounding boxes.
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Justin Pinkney el 31 de En. de 2020