学术
摘 要:
成像物镜具有两个独立的焦距，并分别对空间物体成像，这种系统被称为双焦成像系统。双焦成像系统从单一角度记录三维场景中各物点的图像，它构成了单目立体视觉的基本光学成像模型。由于焦距为^和厶的物镜所成的像的矢量值存在差别，即视差，并且视差的大小与物点的深度存在着定量关系，因此可利用双焦成像的视差特征来恢复场景的深度信息。叙述了双焦成像的立体视觉原理和系统的改进方案，并根据双焦成像的深度算法对已知深度的物方平面进行了深度测量。试验结果表明，深度恢复的相对误差约为-0．14％，测量结果的方差为0．97mm。[著者文摘]
文章出处:
《光学技术》-2007年33卷6期 -935-937页
栏目信息:
文献标识码:
A
文章编号:
1002-1582（2007）06-0935-03
Bifocus imaging for monocular stereo vision
WANG Yuan-qing （Department of Electronic Science ＆ Engineering, Nanjing University, Nanjing 210093, China）
Abstract:
The bifocus lens, which is so called as bifocus imaging system, may respectively produce images by the indepen- dent focal length. Only from single view point, the original data acquisition for recover the depth information about the scene may be finished. This optical system is the based on imaging model of monocular stereo vision for machine. The parallax vectors are different between the images taken by the different focus lenses, and the disparity is related to the objective depth. The depth may be detected by the disparity value. The principles of the bifocus imaging system are described. The experimental re- suits indicate that relative error is less than - O. 14 %, covariance for the actual range is 800mm and computational average depth is 798. 857mm.[著者文摘]
Key words:
imaging optics; stereo vision; monocular stereo; bifoeus imaging; machine vision; depth
基金资助:
国家自然科学基金资助项目（60472026）
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