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A registration method for an inspection tour map and a reference map based on SURF features

A reference map and feature pair technology, applied in image analysis, image data processing, instruments, etc., can solve the problem of low detection accuracy and achieve the effects of improved registration accuracy, strong robustness, and simple calculation steps

Pending Publication Date: 2019-05-07
BEIJING AEROSPACE FUDAO HIGH TECH
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Problems solved by technology

[0008] To this end, the present invention provides a registration method based on SURF features for inspection maps and reference maps to overcome the problem of low detection accuracy due to inability to register in the prior art

Method used

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  • A registration method for an inspection tour map and a reference map based on SURF features
  • A registration method for an inspection tour map and a reference map based on SURF features
  • A registration method for an inspection tour map and a reference map based on SURF features

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Embodiment 1

[0081] This embodiment will detect whether the handwheel components in the field device are missing, including three parts: the registration of the inspection image and the reference image based on the SURF feature, the edge extraction of the registration image based on the Canny operator, and the generalized Hough transform. When detecting the field equipment, first use the SURF algorithm to register the collected inspection map and the reference map, and use the Canny operator to extract the edge of the registration map after the registration is completed. Output the edge image; after the output is completed, use the generalized Hough transform to calculate the mutual information between the edge image and the template image, and determine whether it is missing according to the calculated mutual information value. It is understandable that the detection method described in this embodiment can be used not only to determine whether the handwheel in the device is missing, but als...

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Abstract

The invention relates to a registration method for an inspection tour map and a reference map based on SURF characteristics. The registration method comprises the following steps: acquiring the inspection tour map and the reference map of a target area; Extracting features in the image by using an SURF algorithm; carrying out Euclidean distance sorting on the feature points after feature extraction, calculating Euclidean distances between all SURF feature points of the inspection tour map and the reference map, and finding out a minimum distance value; Arranging the inspection images subjectedto feature extraction and the reference image in parallel, and performing second screening of registration point pairs near an average value of registration lines; And for the screened matching pointpairs, calculating an affine transformation matrix, and utilizing the matrix to complete registration of the inspection tour map and the reference map. According to the method, the inspection tour map and the reference map are registered by using the SURF features, the SURF operator has scale and rotation invariance, and has very high robustness on image noise, light change, affine deformation and the like, so that accurate feature descriptor extraction can be carried out for the same object in the inspection tour map and the reference map.

Description

Technical field [0001] The present invention relates to the technical field of image recognition and registration, in particular to a method for registering inspection images and reference images based on SURF features. Background technique [0002] With the rapid development of computer technology, target recognition technology has rapidly developed into a very important tool and method, and its application range has become wider and wider. However, due to the impact of the environment, shooting angle and its own conditions on the target of the nut, handwheel and other related parts, it is usually difficult to express it analytically, making its identification a very difficult task. So far, the researcher has aimed at identifying the relevant parts of the nut handwheel, mainly for identifying the relevant parts of the nut handwheel taken from the front under ideal conditions. The main application method is the circular Hough transform to detect the relevant zero of the nut handw...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 赵戊辰
Owner BEIJING AEROSPACE FUDAO HIGH TECH
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