Abstract: A point cloud processing method is provided. The method includes: depicting, at a computing device, a three-dimensional image based on a point cloud data set; converting, at the computing device, the three-dimensional image to a two-dimensional image; dragging, at the computing device, a brush to form a coverage are; determining, at the computing device, whether a point is within the coverage area by comparing coordinates of each point in the two-dimensional image with coordinates of area boundary of the coverage area; and painting, at the computing device, the point within the coverage area to specific color.

Abstract: A point cloud data processing system permitting free-form data selection of the cloud data includes an image forming module, a coordinate conversion module, a selection module, and a determination module. The image forming module graphs a three-dimensional image of the point cloud file. The coordinate conversion module transforms the three-dimensional image into a planar image. The selection module performs a polygon-shaped selection operation and shows a polygon-shaped region based a point cloud area selected in such a manner that the polygon-shaped region circumscribes the point cloud area selected. The determination module graphs a bounding box based on the outline of the polygon-shaped region, and determines whether graphical points lie inside both the bounding box and the polygon-shaped region. Graphical points that lie within both are further marked with color or other marking process, and graphical points which are not within both can be deleted or edited.