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Image reconstruction method and device based on spline surface

A spline surface and image reconstruction technology, which is applied in the field of image processing, can solve problems affecting the efficiency of image reconstruction, non-uniform scaling and cutting of test pictures, and difficulty in searching for reference points, so as to overcome non-uniform scaling and cut effect

Inactive Publication Date: 2015-09-09
GUANGDONG VTRON TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FFD is simple and easy to use, but it is easy to subject the test image to non-uniform scaling and clipping, which hinders the display effect in many applications
Moreover, it is difficult to search for reference points for resampling, which seriously affects the efficiency of image reconstruction

Method used

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  • Image reconstruction method and device based on spline surface
  • Image reconstruction method and device based on spline surface
  • Image reconstruction method and device based on spline surface

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] figure 1 It is a flow chart of the image reconstruction method based on spline surface of the present invention, including:

[0024] S101: Arrange the number and positions of sampling points according to a preset zoom ratio;

[0025] S102: Obtain the node interval where the i-th sampling point is located according to the coordinates of the Nth row or column node of the spline surface;

[0026] S103: In the range of the node interval, search for the quadrilateral area with the smallest area surrounding the i-th sampling point;

[0027] S104: When the quadrilateral area exists, reconstruct the pixel value of the i-th sampling point according to the pixel values ​​of the four nodes of the quadrilateral area.

[0028] Image reconstruction technology generally uses cont...

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Abstract

The invention discloses a spline surface based image reconstruction method and a device thereof. The method includes arranging the quantities and locations of sampling points according to a preset scaling; acquiring a node interval where the i sampling point is located according to a coordinate of a node at the N row or column on a spline surface; looking up a quadrilateral domain which surrounds the i sampling point and has a smallest area in the range of the node interval; and reconstructing a pixel value of the i sampling point according to pixel values of four nodes of the quadrilateral domain when the quadrilateral domain exists. By means of the spline surface based image reconstruction method and the device thereof, modifications can be performed on the basis of free form deformation, the accuracy can be adjusted by means of different quantities of control points, a defect that the scaling and shearing of images in free form deformation are non-uniform is overcome, and the efficiency of image reconstruction is improved due to the application of a high-efficiency search strategy.

Description

Technical field [0001] The present invention relates to image processing technology, in particular to an image reconstruction method and device based on spline curved surfaces. Background technique [0002] As an application of computer vision, image deformation algorithm has attracted much attention in recent years, and its value is being continuously improved and developed in research and practice. We apply image morphing technology to generate a smooth transition from one digital image to another, or according to the transformation between multiple images, which can produce amazing visual effects. Image deformation technology has a wide range of applications. In medical imaging, image deformation is an important application. For some operations, many models and deformation assumptions are required. This technology is of great help to medical research. It can also be used in the film and television industry for virtual characters, roles, entertainment, face memory synthesis, v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 杨锦彬赵群英
Owner GUANGDONG VTRON TECH CO LTD
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