An Image Gradient Method Based on Shape Interpolation

An interpolation and image technology, which is applied in the field of image gradient based on shape interpolation, can solve the problems of maintaining and not being able to directly apply complex and detailed images, achieve natural and smooth gradient effects, enhance practicability and convenience, and avoid local distortions Effect

Active Publication Date: 2019-04-23
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the shape interpolation method can effectively avoid the distortion of the shape, thereby maintaining the geometric characteristics of the described object, the shape interpolation method is usually only suitable for vector graphics with simple outlines, and cannot be directly applied to images with more complex and rich details.

Method used

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  • An Image Gradient Method Based on Shape Interpolation
  • An Image Gradient Method Based on Shape Interpolation
  • An Image Gradient Method Based on Shape Interpolation

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Embodiment 1

[0035] Such as figure 1The illustrated embodiment is an image gradient method based on shape interpolation, including a source image and a target image. Given a source image and a target image, the user can place an open or closed curve (called " Characteristic curve"), specify and align the geometric features in the source image and the target image. Geometric features generally refer to internal features such as eyes, nose, eyebrows, hands and simple external contours.

[0036] The source image includes the set of source characteristic curves The target image includes the set of target characteristic curves The method comprises the steps of:

[0037] Step 100, Construct and The line appearance model of ;

[0038] Pick Each characteristic curve in The center of gravity of the curve acts as a proxy for the position of the curve in space; the The center of gravity of each characteristic curve is connected with the center of gravity of other characteristic curves ...

Embodiment 2

[0064] This embodiment contains all the content in Embodiment 1. For the source image and the target image, this embodiment uses a regular quadrilateral grid to approximate, and embeds the source image into the grid as a texture, and embeds the target image into the grid as a texture. In the grid, in the process of image gradient, the calculation is performed according to the position of each grid point, instead of calculating the deformation position of each pixel of the image, making full use of GPU resources, greatly reducing the amount of calculation of the program, saving computing costs, and realizing Real-time performance of image deformation.

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Abstract

The invention discloses a shape-interpolation-based image morphing method. A source image and a target image are included. The source image includes a source feature curve set {S<0>i}; and the target image includes a target feature curve set {S<1>i}. With an intermediate feature curve as a constraint, an optimal deformation position of any point in the source image and the target image is calculated, thereby realizing geometry deformation of the source image and the target image relative to the intermediate feature curve and realizing alignment fusion corresponding to the geometrical features in the source image and the target image. According to the invention, a natural and smooth transition sequence and gradually changing image can be generated; and thus the practicability and convenience of the image morphing technology can be enhanced.

Description

technical field [0001] The invention relates to the technical field of two-dimensional image deformation, in particular to an image gradient method based on shape interpolation. Background technique [0002] With the development of digital media technology, many digital entertainment applications have emerged, such as movies, networks, games and so on. Image gradients are an important part of these applications. Therefore, in order to further promote and popularize these applications, it is necessary to design and provide corresponding tools to make the effect of image gradients more realistic and natural, and to allow ordinary users to intuitively and easily create image gradients. [0003] Image morphing technology (Image morphing) is developed on the basis of computer graphics and digital image processing. It mainly extracts the corresponding geometric features in two images, and then uses geometric transformation to fuse their features. Their colors are mixed and inter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/00
CPCG06T3/0093
Inventor 杨文武黄冠华
Owner ZHEJIANG GONGSHANG UNIVERSITY
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