PHOTOMETRIC-METHOD FOR DETERMINING SURFACE ORIENTATION FROM MULTIPLE IMAGES
PHOTOMETRIC-METHOD FOR DETERMINING SURFACE ORIENTATION FROM MULTIPLE IMAGES
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DOI：
10.1117/12.7972479
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发表时间：
1980-01-01
影响因子：
1.3
通讯作者：
WOODHAM, RJ
中科院分区：
文献类型：
--
作者：
WOODHAM, RJ
介绍了一种称为光度立体的新技术。光度立体的想法是改变连续图像之间的入射照明方向，同时保持观察方向不变。它示出，这提供了足够的信息来确定在每个图像点的表面取向。由于成像几何形状没有改变，因此图像点之间的对应关系是先验已知的。该技术是光度学的，因为它使用在连续视图中的单个图像位置处记录的辐射值，而不是位移特征的相对位置。光度立体用于基于计算机的图像理解。它可以以两种方式应用。首先，它是一个通用的技术，用于确定在每个图像点的表面取向。其次，它是一种用于确定具有特定表面取向的物点的技术。这些应用程序说明使用合成的例子。
A novel technique called photometric stereo is introduced. The idea of photometric stereo is to vary the direction of incident illumination between successive images, while holding the viewing direction constant. It is shown that this provides sufficient information to determine surface orientation at each image point. Since the imaging geometry is not changed, the correspondence between image points is known a priori. The technique is photometric because it uses the radiance values recorded at a single image location, in successive views, rather than the relative positions of displaced features. Photometric stereo is used in computer-based image understanding. It can be applied in two ways. First, it is a general technique for deter-mining surface orientation at each image point. Second, it is a technique for determining object points that have a particular surface orientation. These applications are illustrated using synthesized examples.