Motionless foreground objects are key targets in applications of home care monitoring and abandoned object detection,and pose a great challenge to foreground detection.Most algorithms incorporate the motionless foreground objects into their background models because they have to adapt to environmental changes.To overcome this challenge,a foreground detection method based on nonlinear independent component analysis(ICA) was proposed.Considering that each video frame was actually a nonlinear mixture of the background image and the foreground image,the nonlinear ICA was employed to accurately separate the independent components from each frame.Then,the entropy of grayscale image was calculated to classify which resulting independent component was the foreground image.The proposed nonlinear ICA model was trained offline and this model was not updated online,so the method can cope with the motionless foreground objects.Experimental results demonstrate that,the method achieves remarkable results and outperforms several advanced methods in dealing with the motionless foreground objects.
展开▼
