Optical Flow Computation Based on Analytic Wavelet
-
摘要: 在基于小波变换的光流计算中,实值小波系数的相位振荡和多分辨率计算的累计误差是影响光流计算精度的两个主要原因.通过引入解析小波以降低相位振荡的影响,同时结合M估计子能够有效抑制参数估计产生的大误差项,提出一种多尺度多分辨率的光流计算方法.实验表明,与现有的基于小波变换的光流计算方法相比,提出的方法不论在光流计算的精度还是可计算范围上都有很大程度的提高.Abstract: As two major limitations to applying optical flow to motion estimation, oscillating of wavelet coefficients and cumulative error highly affected precision in calculation. It was proposed that an algorithm for estimating optical flow based on analytic wavelets that suppress the oscillating of wavelet coefficients,and M-estimator that minimizes error of estimation. Experimental resultsshow the applicability of the proposed methods to some benchmark image sequences.
-
Key words:
- image analysis /
- digital image processing /
- wavelet transform /
- motion estimation /
- optical flow
-
[1] Haussecker H W, Fleet D J. Computing optical flow with physical models of brightness variation[J].IEEE Trans Pattern Analysis and Machine Intelligence, 2001,6(23):661~673 [2] Wixson L. Detecting salient motion by accumulating directionally consistent flow [J]. IEEE Trans.Pattern Andysis and Machine Intelligence, 2000,8(22) [3] Nestares O, Heeger D J. Robust multiresolution alignment of MRI brain volumes[J]. Magnetic Resonance in Medicine, 2000,43:705~715 [4] Bernard C. Discrete wavelet analysis for fast optic flow computation. Ecole polytechnique, 1999 [5] Barron J, Fleet D, Beauchemin S S. Performance of optical flow techniques[J]. International Journal of Computer Vision, 1994,12(1):43~77 [6] Weber J, Malik J. Robust computation of optical flow in a multi-scale differential framework. Fourth International Conference on Computer Vision. 1993.12~20 [7] Camus T. Real-time quantized optical flow. Computer Architectures for Machine Perception CAMP '95. 1995.126~131 [8] Ong E P, Spann M. Robust multiresolution computation of optical flow. Acoustics, Speech, and Signal Processing, 1996(4):1938~1941 [9] Magarey J, Kingsbury N. Motion estimation using a complex-valued wavelet transform[J]. IEEE Trans on Signal Processing, 1998,46(4):1069~1084 [10] Wu Yute, Kanade T, Cohn J, et al. Optical flow estimation using wavelet motion model. Computer Vision. 1998. 992~998 -
点击查看大图
计量
- 文章访问数: 2366
- HTML全文浏览量: 48
- PDF下载量: 4
- 被引次数: 0
下载:
