標題: | Practical error analysis of cross-ratio-based planar localization |
作者: | Chuang, Jen-Hui Kao, Jau-Hong Lin, Horng-Horng Chin, Yu-Ting 資訊工程學系 Department of Computer Science |
關鍵字: | cross-ratio;error analysis;error ellipse;robot localization |
公開日期: | 2007 |
摘要: | Recently, more and more computer vision researchers are paying attention to error analysis so as to fulfill various accuracy requirements arising from different applications. As a geometric invariant under projective transformations, cross-ratio is the basis of many recognition and reconstruction algorithms which are based on projective geometry. We propose an efficient way of analyzing localization error for computer vision systems which use cross-ratios in planar localization. By studying the inaccuracy associated with cross-ratio-based computations, we inspect the possibility of using linear transformation to approximate localization error due to 2-D noises of image extraction for reference points. Based on such a computationally efficient analysis, a practical way of choosing point features in an image so as to establish the probabilistically most accurate planar location system using cross-ratios is developed. |
URI: | http://hdl.handle.net/11536/8035 |
ISBN: | 978-3-540-77128-9 |
ISSN: | 0302-9743 |
期刊: | ADVANCES IN IMAGE AND VIDEO TECHNOLOGY, PROCEEDINGS |
Volume: | 4872 |
起始頁: | 727 |
結束頁: | 736 |
顯示於類別: | 會議論文 |