Pencil sketch simulating and drawing system based on brush stroke

Abstract

The invention discloses a pencil sketch simulating and drawing system based on brush stroke. In the system, a three-dimensional geometrical model is used as input, and a pencil sketch picture is generated by combining automatic generation and interaction. The system classifies the brush strokes in the pencil sketch drawing into feature brush strokes and hatch brush strokes, and performs simulation and drawing respectively. The system mainly comprises a user interaction module, a feature path automatic generation module, a hatch path automatic generation module, a module for generating brush strokes from paths and a drawing output module. The system disclosed by the invention conforms to the actual pencil sketch creation mechanism of the human, realizes a real drawing effect, is easy to edit and modify and the like, and has important application values in the aspects of computer-aided design, artistic design, special effects, digital entertainment and the like.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of combining computer graphics, computer-aided design and art design, and relates to a method for automatically or interactively generating pencil sketches based on strokes according to an input three-dimensional geometric model. Background technique [0002] The simulation of various art media has been widely used in the fields of digital art design, digital entertainment, film animation production, and digital image processing, and pencil sketch drawing, as the basic content of painting, has attracted extensive attention. The existing pencil sketch simulation drawing methods can be roughly divided into four categories: methods based on volume rendering, methods based on texture mapping, methods based on images and methods based on strokes. [0003] The earliest work in the pencil sketch simulation rendering work is the volume rendering model established by Takagi et al. Volume rendering ...

AI Technical Summary

Problems solved by technology

Contrary to the texture mapping method, this type of method only describes the drawing object in the two-dimensional image space, and cannot use the geometric information of the object's three-dimensional space

Due to the lack of structural information, the data representation is generally loose, which is not conducive to editing

[0006] Both the texture-mapping-based method and the image-based method treat the pencil sketch lines as a collection (texture or image), lacking individual pencil line information, and thus cannot reflect the human drawing process and drawing habits.

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