关于融合多针图确定物体三维表面绝对深度的研究
On Fusing Multiple Needle Maps for Recovering 3-D Absolute Depth
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摘要: 利用PS(Photometric Stereo)系统很易确定物体表面方向及相对深度,但不能确定绝 对深度.为确定绝对深度,本文提出的算法首先利用BPS(Binocular Photometric Stereo) 系统获得一对表面方向图,然后,基于geodesic dome分割这对方向图并计算图中对应区域 间的视差.最后,通过施加多种约束,经适当融合及精确的视差匹配,确定景物物体3D表 面绝对深度.这一方法对进一步研究怎样确定任意3D表面深度并复原景物结构有着十分重 要的意义.Abstract: The photometric stereo system can easily determine the surface orientation and relative depth of an object, but can not determine absolute depth. In order to determine absolute depth, this paper proposes an algorithm which obtains a pair of the needle maps between the corresponding areas in the two needle maps by binocular photometric stereo system, solves disparities between the corresponding areas in the two needle maps first and then fuses disparities correctly and match them accurately, finaly reconstructs 3- D depth of the object surface. This method is very useful for as to conduct research on 3- D surface depth reconstruction and to recover scene structure.
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