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Computer assisted character animation drawing method based on light irradiated ball model

A computer-aided and artistic technology, applied in the direction of animation production, calculation, 3D image processing, etc., can solve the problem of monotonous parameter adjustment, and achieve the effect of solving low drawing efficiency and improving drawing efficiency

Inactive Publication Date: 2009-07-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of this method of highlight drawing depends on how to construct a good set of highlight vector fields, which requires monotonous parameter adjustment

Method used

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  • Computer assisted character animation drawing method based on light irradiated ball model
  • Computer assisted character animation drawing method based on light irradiated ball model
  • Computer assisted character animation drawing method based on light irradiated ball model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] The following uses an example of our implementation, that is, to extract the artistic coloring in the cartoon "Mulan" and apply it to our character animation drawing to describe the implementation of the specific process. The steps are as follows (see figure 1 ):

[0054] 1) Read in the artistic sample and select the available color blocks in the image (see figure 2 ). The marquee is a triangle, rectangle or ellipse, which provide different extraction methods for objects of different shapes; the triangle marquee is used to extract artistic coloring of irregularly shaped parts, such as character skin (see image 3 (a)); The rectangular marquee is used to extract the artistic coloring of the cylindrical part, such as the straight hair of the character (see image 3 (b)); The elliptical marquee is used to extract the artistic coloring of spherical parts, such as the character's eyeball (see image 3 (c)).

[0055] 2) Map the color block selected in step 1) onto the il...

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PUM

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Abstract

The invention discloses a method for rendering character animation in an artistic manner with the assistance of a computer. The method is based on an illumination spherical model. The invention is characterized in that the illumination spherical model which extracts and creates an artistic style from a work of art is applied to rendering of a character model, so that coloring of an artistic style is realized conveniently and rapidly, and character animation can be manufactured as if by non-photorealistic rendering. By drawing on a method for rendering information about illumination on a sphere, the invention ensures that when a complex object which is uniform in illumination material is rendered, the illumination is consistent in an all-round manner. Because of extraction and application of the illumination spherical model, character rendering of the artistic style can be realized conveniently and rapidly only through simple interactive operation, so that rendering efficiency is improved. The invention solves the problems that the prior computer assisted animation has low rendering efficiency, and the traditional image technology cannot give expression to works of an artist flexibly.

Description

technical field [0001] The invention relates to a computer-aided character animation drawing method, in particular to a computer-aided character animation artistic drawing method based on an illumination sphere model. Background technique [0002] In terms of non-photorealistic rendering, scholars have explored many techniques to simulate the artist's style, and one of the most concerned forms is cel rendering or toon rendering. Cel drawing is the "art" of drawing objects like cartoons. This drawing method can give people a strong sense of subtlety and childishness. At the same time, this method is very simple, that is, draw the object with a solid line and divide the object into regions with different colors. In the field of computer graphics, the toon drawing style has been used around the 1990s to achieve the combination between 3D models and 2D cel animations. Compared with other NPR styles, this drawing style is relatively simple and can be easily generated automatica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/70G06T15/50G06T13/40
Inventor 耿卫东徐筠李响
Owner ZHEJIANG UNIV
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