Abstract: A portable three dimension (3D) body measurement system was developed. By measuring the body using the system, the body point clouds are reconstructed. Base on the characteristic of point cloud, the paper proposed a method of fan-shaped grids to simplify the body point cloud. The method can be operated with high speed and the simplifying rate can be controlled easily. By this method, the simplified point cloud retained the details in the concave to prevent the contour from distorting. The simplified point cloud can be sorted quickly by fan-shaped angles and grids. The result optimized the following operations of denoising and hole-repairing.

Key words: non-contact measurement , body point cloud , point colud simplification , fan-shaped grid