COSMOS - A representation scheme for 3D free-form objects
COSMOS - A representation scheme for 3D free-form objects
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DOI：
10.1109/34.625113
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发表时间：
1997-10-01
影响因子：
23.6
通讯作者：
Jain, AK
中科院分区：
文献类型：
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作者：
Dorai, C;Jain, AK
我们解决的问题表示和识别三维自由形式的对象时，1）对象的视点是任意的，2）对象的形状和复杂性可能会有所不同，3）没有限制性的假设，对对象的表面类型。我们假设场景的范围图像是可用的，包含没有遮挡的刚性3D对象的视图。我们提出了一个新的和一般的表面表示方案，用于识别具有自由形式（雕刻）表面的物体。在该方案中，一个对象被简洁地描述为常数形状指数的最大曲面片。代表物体的最大面片通过它们的方向映射到单位球面上，并通过形状谱函数聚集。诸如表面积、弯曲度和连通性等属性（捕获局部和全局信息所需的属性）也内置于表示中。该方案产生了一个有意义的和丰富的描述有用的对象识别。一个新的概念，一个对象的形状谱也被引入到COSMOS框架内的对象视图分组和匹配。我们使用复杂目标的真实的距离像证明了我们方案的通用性和有效性。
We address the problem of representing and recognizing 3D free-form objects when 1) the object Viewpoint is arbitrary, 2) the objects may vary in shape and complexity, and 3) no restrictive assumptions are made about the types of surfaces on the object. We assume that a range image of a scene is available, containing a view of a rigid 3D object without occlusion. We propose a new and general surface representation scheme for recognizing objects with free-form (sculpted) surfaces. In this scheme,an object is described concisely in terms of maximal surface patches of constant shape index. The maximal patches that represent the object are mapped onto the unit sphere via their orientations, and aggregated via shape spectral functions. Properties such as surface area, curvedness, and connectivity, which are required to capture local and global information, are also built into the representation. The scheme yields a meaningful and rich description useful for object recognition. A novel concept, the shape spectrum of an object is also introduced within the framework of COSMOS for object view grouping and matching. We demonstrate the generality and the effectiveness of our scheme using real range images of complex objects.