- What is the problem?
Vision-based background subtraction algorithms model the intensity variation across time to classify a pixel as foreground. Unfortunately, such algorithms are sensitive to appearance changes of the background such as sudden changes of illumination or when videos are projected in the background.
- What is our solution?
We propose an algorithm to extract foreground silhouettes without modeling the intensity variation across time. Using a camera pair, the stereo mismatch is processed to produce a dense disparity based on a Total Variation (TV) framework.
- Why is our solution proposed?
Experimental results show that with sudden changes of background appearance, our proposed TV disparity-based extraction outperforms intensity-based algorithms and existing stereo-based approaches based on temporal depth variation and stereo mismatch.
A. Alahi, L. Bagnato, D. Matti, and P. Vandergheynst. Foreground Silhouettes Extraction robust to Sudden Changes of background Appearance. In IEEE International conference on Image Processing, 2012. [ Details | Full Text ]