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Pointer type instrument panel automatic reading method under long-distance and multi-view environment

An automatic reading and multi-view technology, applied in the field of computer vision, can solve problems such as blurred scales, deformation of the dial, and inability to fully recognize the readings, achieving high accuracy, simple methods, and the effect of improving industrial production efficiency

Active Publication Date: 2017-09-08
JIANGSU HAOHAN INFORMATION TECH
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above deficiencies and provide a long-distance multi-view angle environment that solves the problems of serious deformation of the dial and blurred scales to the point that the naked eye cannot fully recognize the readings at long-distance squint angles, and has a high accuracy rate. The automatic reading method of the pointer meter panel

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  • Pointer type instrument panel automatic reading method under long-distance and multi-view environment

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Embodiment Construction

[0044] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0045] Such as Figure 1-6 A method for automatic reading of a pointer instrument panel in a long-distance multi-angle environment is shown, including the following steps:

[0046] a. Calibrate the dial center of the template dial, the dial radius and the angle information of the main scale as prior knowledge;

[0047] b. Input the dial image to be read and its template image, and calculate the KAZE features of the template image and the dial image to be read;

[0048] c. Use the KNN algorithm to match the KAZE features of the two pictures to obtain a set of matching points, and record the set in the dial picture to be read as S={(x i ,y i )},...

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Abstract

The present invention discloses a pointer type instrument panel automatic reading method under a long-distance and multi-view environment. The method comprises the steps of dial plate area determination, segmentation processing, pointer extraction fitting and reading estimation, and is characterized by determining a dial plate area in an image by matching the key points of a to-be-identified image and a template dial plate, then distributing a binaryzation dial plate according to a histogram, obtaining the internal information of the dial plate by the binary image morphologic processing, and then inducing and merging the straight lines obtained by the progressive probabilistic Hough transform fitting to obtain a pointer angle, and finally calculating the pointer reading according to a transcendental pointer. The pointer type instrument panel automatic reading method of the present invention solves the problems that the distortion of the dial plate is severe under a long-distance strabismus angle, the scales are fuzzy, and the reading can not be identified completely by the eyes, and has the higher accuracy.

Description

technical field [0001] The invention relates to the field of computer vision, in particular to an automatic reading method of a pointer instrument panel in a long-distance multi-angle environment. Background technique [0002] At present, pointer instruments are widely used in equipment operation status monitoring and monitoring. The previous manual inspection, meter reading, and recording modes can no longer meet the requirements of factories for management and production efficiency. The automatic recognition technology of instrument indications is directly related to With the development of factory automation and informatization, the current pointer instruments mostly adopt the principle of automatic identification based on machine vision. Existing methods are mostly aimed at the situation that the dial occupies a large area of ​​the image, the distance is relatively close, and the dial is clear. The dial image processed by the present invention has two difficulties. One ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46
CPCG06V10/443
Inventor 胡彬江宁成耀杨赛潘雨
Owner JIANGSU HAOHAN INFORMATION TECH
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