Linear constrained image distortion method based on local coordinates

A technology of local coordinates and image deformation, used in image data processing, animation production, instruments, etc., to achieve a good bending effect

Inactive Publication Date: 2008-10-01
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, general non-rigid body transformations (such as bending, irreg

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  • Linear constrained image distortion method based on local coordinates
  • Linear constrained image distortion method based on local coordinates
  • Linear constrained image distortion method based on local coordinates

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] The method of the present invention converts the deformation problem of graphics into the corresponding grid M 0 deformation problem. This method first takes an image I(x) as input, and constructs a deformed region with a pixel interval d D ⊆ I The corresponding quadrilateral domain mesh M 0 . For the convenience of processing, the grid is composed of several squares with side length d. The smaller d is selected, the M 0 The closer it is to the shape of D, but the calculation amount is correspondingly increased. Since the method of the present invention is aimed at the field of animation production, the details of the shape of D are not critical, so a larger value can be selected for d, as long as it properly reflects the required details. This meshing process treats D as a mesh M 0 and record the corresponding te...

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Abstract

The invention relates to a linear image deformation method based on a local coordinate. The method comprises transforming an image into a corresponding four-side-territory grid, presenting the geometrical characteristics of the grid by affine and angle linearity restriction, constructing a boundary restriction condition based on a user-appointed control culmination, solving a linear equations set, rapidly computing the deformed image. According to the method, the deformation effect with translation sensibility can be obtained by an interaction speed, the proportion of affine deformation can be controlled by adjusting the weights of two kind of linearity restriction, complex deformation effects, such as good bend, translation sensibility, anisotropy zoom, etc., are realized.

Description

technical field [0001] The present invention relates to the deformation technology of two-dimensional image, in particular to the animation production technology for deforming the two-dimensional image depicted with animation image. Background technique [0002] A large number of artistic images, such as cartoon characters, are stored in the form of images. If you can control their deformation in a simple way and quickly generate various new actions and expressions, you can significantly improve the efficiency of animation production and reduce the difficulty of production. This demand has the following characteristics: firstly, the deformation of this animation image is an inaccurate deformation, and it is not necessary to use methods such as physical simulation to obtain accurate results, as long as the basic geometric characteristics are maintained; secondly, users hope to control the deformation results through simple means; In addition, the algorithm should have high r...

Claims

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Application Information

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IPC IPC(8): G06T13/00G06T13/80
Inventor 罗笑南李峥苏卓
Owner SUN YAT SEN UNIV
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