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Automatic straightening image stitching method

An image stitching, automatic technology, applied in the field of image processing

Active Publication Date: 2017-09-05
CHONGQING UNIV OF POSTS & TELECOMM
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  • Description
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the problem existing in the prior art that can produce tilting and twisting phenomenon

Method used

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Embodiment 1

[0098] This embodiment provides an image stitching method, the method comprising:

[0099] (1) Use the A-KAZE algorithm to extract feature points from the target image and the reference image;

[0100] (2) matching the feature points extracted in step (1) to complete image registration;

[0101] (3) According to the image registration result in step (2), use a fusion algorithm to carry out image fusion to obtain a fusion image;

[0102] (4) if Figure 16 , carry out automatic straightening to fusion image described in step (3), comprising:

[0103] (x1) Record the 4 vertex coordinates of the upper left, lower left, upper right and lower right of the fusion image, which are (a.x, a.y), (b.x, b.y), (c.x, c.y) and (d.x, d.y);

[0104] (x2) Set the 4 vertex coordinates after straightening, the upper left vertex coordinates are (a.x, a.y), the sitting vertex coordinates are (b.x, b.y), the upper right and lower right coordinates are (X, a.y), (X ,b.y), X is the estimated length...

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Abstract

The invention relates to an automatic straightening image stitching method, which mainly solves the technical problem of oblique and twisted phenomena existing in the prior art by the technical scheme which includes the steps of extracting feature points from a target image and a reference image by using an A-KAZE algorithm; matching the feature points to complete image registration; performing image fusion using a fusion algorithm to obtain a fused image; and automatically straightening the fused image, including: recording four vertex coordinates of the upper left, the lower left, the upper right and the lower right of the fused image; setting the four vertex coordinates after straightening, keeping the vertex coordinates of the upper left and the lower left unchanged, letting the upper right and lower right coordinates be (X,a.y) and (X,b.y) respectively, X being the length of a panorama after straightening, and letting X=MAX (c.x,d.x)-a.x; and establishing an equation set to calculate a transformation matrix XM, applying the transformation matrix XM to the fused image and performing bilinear interpolation of the fused image to complete the image straightening. The method of the invention better solves the problem and can be used for image stitching.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image splicing method for automatic straightening. Background technique [0002] Images relate to all fields of people's life and work. With the rapid development of computer-related fields, the application value of digital image processing has been discovered by many experts and scholars, and its application fields are also growing. As a promising interdisciplinary subject, digital image processing has attracted many researchers from other scientific fields to participate in it, and has been widely used in basic research and engineering practice. Image stitching technology is an indispensable key branch in digital image processing. In recent years, with the development of computer vision and computer graphics, the combination of image stitching technology and other related technologies has opened up many new fields and has become a research hotspot. . The main purpose of im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00G06T3/40G06T5/50
CPCG06T3/4038G06T5/50G06T3/14
Inventor 瞿中卜玮危学明黄旭吴戈王腾峰
Owner CHONGQING UNIV OF POSTS & TELECOMM
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