Oriented structure of the occlusion distortion: is it reliable?

IEEE Transactions on Pattern Analysis and Machine Intelligence - Tập 24 Số 9 - Trang 1286-1290 - 2002
Weichuan Yu1, G. Sommer2, S. Beauchemin3, K. Daniilidis4
1Department of Diagnostic Radiology, Yale University, New Heaven, CT, USA
2Institute of Computer Science, University of Kiel, Kiel, Germany
3Department of Computer Science, University of Western Ontario, London, Canada
4GRASP Laboratory, University of Pennsylvania, PA, USA

Tóm tắt

In the energy spectrum of an occlusion sequence, the distortion term has the same orientation as the velocity of the occluding signal. Other works claimed that this oriented structure can be used to distinguish the occluding velocity from the occluded one. We argue that the orientation structure of the distortion cannot always work as a reliable feature due to the rapidly decreasing energy contribution. This already weak orientation structure is further blurred by a superposition of distinct distortion components. We also indicate that the superposition principle of Shizawa and Mase (1991) for multiple motion estimation needs to be adjusted.

Từ khóa

#Spectral analysis #Motion analysis #Signal analysis #Equations #Fourier transforms #Convolution #Distortion #Motion estimation #Frequency domain analysis

Tài liệu tham khảo

10.1016/0042-6989(92)90039-L 10.1007/BF00133568 10.1109/ICCV.2001.937512 j�hne, 1993, Spatio-Temporal Image Processing, 10.1007/3-540-57418-2 10.1109/83.536893 10.1109/83.709656 10.1109/29.1644 10.1007/978-1-4615-3648-2 10.1016/0042-6989(94)90278-X lee, 1996, Image Representation Using 2D Gabor Wavelets, IEEE Trans Pattern Analysis and Machine Intelligence, 18, 959, 10.1109/34.541406 10.1109/CVPR.1991.139704 yu, 1999, Detection and Characterization of Multiple Motion Points, IEEE Conf Computer Vision and Pattern Recognition, 171 10.1016/0042-6989(93)90258-X 10.1364/JOSAA.2.000284 10.1007/978-3-7091-6867-7_20 10.1109/34.825758 10.1023/A:1011220130307