Abstract
This paper proposes an algorithm for the rapid generation of bas-reliefs based on point clouds, which involves two steps: generation of a coarse model and establishment of fine mesh surfaces of the model. In the first step, a modified Z-Buffer algorithm is adopted to designate the visibility of every point before control points in a gridded distribution are arranged on the base plane of a relief. Afterwards, under the constraints of depth and normal information, the optimal compression ratio of the control points is obtained through use of a linear solution. For the compression ratio, bilinear interpolation is performed to generate an original model of the relief. In the establishment of the fine mesh surfaces, an index for measuring surface changes is proposed to adjust the height of the relief once again so as to highlight its detailed features. The aforementioned algorithm is verified by experimental work.
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