田涛, 潘俊民. 基于散焦图像深度测量的一种新方法[J]. 机器人, 2001, 23(1): 15-19..
TIAN Tao, PAN Jun-min. A NEW METHOD OF DEPTH MEASUREMENT BASED ON DEFOCUS IMAGES. ROBOT, 2001, 23(1): 15-19..
Abstract:A new method for depth measurement based on defocus images was proposed. This method uses a single standard CCD camera with telecentric lens, moving camera along optical axis, images are taken at two camera position. According to the defocus radius and magnification of images, the depth is calculated. The relation between magnification and blurring can be simplified, using telecentric lens instead of traditional lens. Fusing the two disparate sources of depth information, magnification and blurring, the proposed method provides more accurate depth calculation. Experimental results demonstrate the effectiveness of the proposed method.
[1] Pentland A P. A New Sense for Depth of Field. IEEE Trans, PAMI,1987,9(4). [2] Tsai W-H. Moment-preserving Thresholding:A New Approach. Computer Vision Graphics Image Process,1985,29:377-393. [3] Watanabe M, Nayar S K. Telecentric Optic for Focus Analysis,IEEE Trans. PAMI,1997,19(12) :1360-1365. [4] Sang Chul Ahn, Sukhan Lee. Experiment Depth from Magnification and Blurring. International Conference on Intelligent Robots and System,1997,2:733-739. [5] Thai B Nguyen,John Oommen B. Moment-Preserving Piecewise Linear Approximations of Signals and Images.IEEE Tran.PAMI,1997,19:84-91. [6] DU-Ming Tsai,Chin-Tun Lin. A Moment-Preserving Approach for Depth from Defocus. Pattern Recognition,1998,31(5):551-560. [7] 李介谷. 计算机视觉的理论与实践(第二版). 上海交通大学出版社, 1999