Method for drawing enhanced model contour surface point

Abstract

The invention relates to a method for drawing enhanced model contour surface point. At the stage of preprocessing, the spatial coordinates, normal vectors, radiuses and color information of sampled points are read and stored, a splat template is generated according to a given layer number, the sampled points are spatially divided according to a threshold specified by a user, k neighbors of each sampled point are solved, and finally, by utilizing the k neighbors, a coordinate transformation method is used to solve the curvature of each point. At the stage of operation, whether the sampled points are contour points or not is judged according to the normal vectors and visual angles of the sampled points, and if the sampled points are contour points, a series of vertex coordinates of curved surface splats with the sampled points as centers are calculated. If the sampled points are not contour points, a Surface Splatting algorithm is utilized to carry out drawing: a Jacobian matrix mapped by the 2D space of the sampled points is solved; the visibility of the splats projected on a screen is determined, and the splats are merged; the spatial light intensity of one pixel of the screen is calculated by utilizing an illumination model and shading; and finally, normalization is carried out. The drawing speed is high, the requirement on real time can be effectively met without hardware acceleration, and moreover, the drawing quality is high.

Description

technical field [0001] The invention belongs to the technical field of computer virtual reality and computer graphics, in particular to a point drawing method in realistic drawing of computer graphics. Background technique [0002] Computer graphics is a subject gradually formed by applying computers to the display and rendering of graphics. From its birth to the present, it has played an increasingly important role in many fields and is playing an increasingly important role. Realistic graphics rendering is an important part of computer graphics (see Wang Jian, Discrete Point Rendering Method for Realistic Graphics, Jilin University, Master Thesis, 2006). It combines mathematics, physics, computer science and other scientific knowledge to generate photo-realistic graphics on computer graphics devices. [0003] According to the different drawing primitives, realistic graphics drawing is divided into geometric primitive-based rendering (GBR), image-based rendering (IBR) and...

AI Technical Summary

Problems solved by technology

[0007] The technology of the present invention solves the problem: Aiming at the problems of aliasing and drawing efficiency in traditional point drawing, a surface point drawing method for enhancing the model outline is provided, which can reconstruct a continuous surface that retains high-frequency signals at the edge of the model, and at the same time Can better meet the requirements of real-time rendering

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