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Novel sub-pixel registration method

A sub-pixel, new type of technology, applied in the field of image processing

Inactive Publication Date: 2012-06-20
绍兴南加大多媒体通信技术研发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the defects of the prior art, the present invention adopts a new type of sub-pixel registration method, which can perform high-precision registration of sub-pixels while reducing the computational complexity

Method used

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Embodiment Construction

[0052] The first step: first calculate the best position on the corresponding Y axis on Δx=(-1, 0, 1), that is, in image 3 The three positions marked with x. Calculated as follows

[0053] e(-1,Δy)=A -1 Δy 2 +B -1 Δy+C -1

[0054] e(0,Δy)=A 0 Δy 2 +B 0 Δy+C 0

[0055] e(1,Δy)=A 1 Δy 2 +B 1 Δy+C 1 Formula 2

[0056] Where e(-1, Δy), e(0, Δy), e(1, Δy) are the error values ​​of the integer pixel area obtained on the Y axis when Δx=(-1, 0, 1), A -1 , B -1 , C -1 , A 0 , B 0 , C 0 , A 1 , B 1 , C 1 is the parameter of the quadratic function (Quadratic Function) at different positions,

[0057] Using the above formula, the best position on the Y axis corresponding to Δx=(-1, 0, 1) can be calculated as

[0058] Δy - 1 * = 1 2 e ( - 1,1 ...

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Abstract

The invention relates to a novel sub-pixel registration method, which is used for simply performing high-precision registration on sub pixels. The sub-pixel registration method comprises the following steps of: 1, calculating an optimal position on a corresponding axis Y when delta x is equal to (-1, 0, 1); 2, taking acquired optimal registration positions as three points on a quadratic function to acquire a theoretical error, and solving a minimum value (delta xv, delta yv) on a tangent plane; 3, calculating an optimal position on a corresponding axis X when delta y is equal to (-1, 0, 1); 4, taking acquired optimal registration positions as three points on a quadratic function to acquire a theoretical error, and solving a minimum value (delta xh, delta yh) on a tangent plane; and 5, forming two lines close to two positions (delta xv, delta yv) and the (delta xh, delta yh) by means of the acquired two positions (delta xv, delta yv) and (delta xh, delta yh), wherein the intersection of the two lines is the optimal sub-pixel registration point.

Description

technical field [0001] The invention relates to an image processing method, in particular to a novel sub-pixel registration method based on a mathematical model algorithm. Background technique [0002] Image registration is a core technology in computer vision, machine vision, image understanding and image and video compression. The application of image registration in post-production of 3D movies has just begun. In the field of 3D film post-production, image registration is mainly to match and superimpose images acquired by different sensors (distance sensors and image sensors) and different camera angles (two cameras at different positions) to obtain 3D post-production. A series of parameters required. [0003] Machine vision, video compression and other aspects have high precision requirements for image registration. In many cases, in addition to achieving the accuracy of integer pixels, image registration must achieve sub-pixel accuracy. Attached to this manual figu...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 戴云扬
Owner 绍兴南加大多媒体通信技术研发有限公司
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