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An Image Stitching Method Based on Best Stitching Plane and Local Features

A local feature, image stitching technology, applied in image analysis, image enhancement, graphic image conversion and other directions, can solve problems such as affecting stitching results, large stretching distortion, stitching traces, etc., to overcome irrationality, improve accuracy, The effect of improving accuracy

Active Publication Date: 2019-06-21
CHONGQING UNIV OF POSTS & TELECOMM
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  • Claims
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AI Technical Summary

Problems solved by technology

When there is a large viewing angle difference between the processed images to be stitched, it is easy to generate a large stretching distortion, which affects the stitching result
At the same time, in order to improve the real-time performance of the algorithm, most of the splicing algorithm fusion methods use the general weighted fusion method, which is prone to splicing traces and ghost images.

Method used

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  • An Image Stitching Method Based on Best Stitching Plane and Local Features
  • An Image Stitching Method Based on Best Stitching Plane and Local Features
  • An Image Stitching Method Based on Best Stitching Plane and Local Features

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Embodiment Construction

[0027] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] The present invention is mainly divided into three parts, the first part is searching for the best stitching plane and region segmentation, dividing the region to be stitched according to the image depth information and obtaining the reference plane for image stitching; the second part is plane transformation and local feature extraction based on the reference plane , transform the stitched image into the reference plane with the best stitching plane as a reference, and extract the ORB features of the region to be stitched; the third part is feature point registration and local area fusion, using Hamming distance for feature point matching, combined with depth The information and the RANSAC algorithm are finely matched, the correction matrix is ​​calculated, and the distance weighting method based on the focal distance is used to fuse...

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Abstract

The invention relates to an image splicing method based on an optimal splicing plane and a local feature. The method comprises the following steps: S1: estimating the depth information of an image; S2: segmenting the image based on the depth information, dividing the original image into an area to be registered and a non-registration area, and determining the optimal splicing plane by using two segmentation lines as sides; S3: calculating rotation angles by using the optimal splicing plane as a reference and using the respective segmentation lines as axes, and transforming the image to be in a reference plane; S4: extracting FAST feature points and the feature description of the feature points in an area to be spliced; S5: calculating Hamming distance for feature point matching, and performing precise matching by using use depth information and an RANSAC algorithm to obtain matching point pairs; and S6: computing a transformation matrix by using the registered feature points to obtain a transformed registration area image, and obtaining a spliced image by using a weighted fusion method based on focus distance. The method can overcome tensile distortion caused by the global correction under a large viewing angle difference, and obtains the spliced image more conforming to human vision.

Description

technical field [0001] The invention belongs to the technical field of image stitching, and relates to an image stitching method based on an optimal stitching plane and local features. Background technique [0002] Image stitching technology is to stitch multiple small-view images with overlapping areas into a complete large-view image, which has better image quality than the large-view images obtained by hardware. Image stitching mainly includes the following three steps: preprocessing, image registration and image fusion. Among them, image registration is the core and key of image stitching, and image fusion is the last step in generating a wide-view image. The current image registration methods are mainly divided into three categories: methods based on transform domain, methods based on gray correlation and methods based on features. The feature-based image registration method is the best method, but the current algorithm generally uses an image to be stitched as a refe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40G06T3/00G06T7/50G06T7/11
CPCG06T3/0068G06T3/4038G06T2207/20221
Inventor 陈勇詹帝刘焕淋
Owner CHONGQING UNIV OF POSTS & TELECOMM
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