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High-speed pixel matching method based on LK optical flow

A matching method and optical flow technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of inability to meet real-time dynamic measurement, large amount of calculation, time-consuming, etc. The effect of wide applicability

Inactive Publication Date: 2020-09-08
HUBEI UNIV
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  • Application Information

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Problems solved by technology

Due to the huge amount of calculation caused by the correlation calculation, the entire 3D reconstruction process takes a lot of time and cannot meet the requirements of real-time dynamic measurement

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  • High-speed pixel matching method based on LK optical flow
  • High-speed pixel matching method based on LK optical flow
  • High-speed pixel matching method based on LK optical flow

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Embodiment Construction

[0053] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0054] Such as Figure 1-5 As shown, the present invention provides a high-speed pixel matching method based on LK optical flow, projects the fringe pattern onto the measured object moving on the reference plane, collects multiple frames of deformed fringe patterns, and performs adaptive histogram equalization processing on it , and then use the LK optical flow to calculate between every two frames of pictures to obtain a two-dimensional vector matrix. Finally, perform ...

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Abstract

The invention provides a high-speed pixel matching method based on LK optical flow. The method comprises the following steps of projecting a fringe pattern to a measured object moving on a reference plane; acquiring a plurality of frames of deformation fringe patterns, acquiring a grayscale image, performing adaptive histogram equalization processing on the grayscale image, performing calculationbetween every two frames of images by using LK optical flow to obtain a two-dimensional vector matrix, performing data processing on the obtained two-dimensional vector matrix, and finally acquiring motion information of a measured object to complete pixel matching. According to the invention, an optical flow method is adopted to replace a related calculation method to complete pixel matching, anda two-dimensional vector field containing object motion information in two images can be obtained only by calculating the two images before and after motion. The pixel matching efficiency and the three-dimensional reconstruction efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of dynamic three-dimensional measurement of objects, and in particular relates to a high-speed pixel matching method based on LK optical flow. Background technique [0002] With the development of manufacturing, medical imaging, virtual reality, and computer graphics, phase measurement profilometry, which uses multiple fringe pattern algorithms with phase shifts to obtain accurate and high-resolution 3D profiles, has attracted increasing attention. Real-time phase measurement profilometry (PMP) has the characteristics of large amount of collected data, high precision, and non-contact. It can recover the three-dimensional surface shape of the measured object by projecting and collecting multiple frames of fringe images. It is the most popular optical three-dimensional measurement method. A method widely studied and used. [0003] Due to the development of industry and the increase of application occasions, t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/40G06T5/00G06T7/44G06T7/90
CPCG06T5/40G06T7/90G06T7/44G06T2207/10004G06T5/90
Inventor 彭旷戴铭酉徐博赵江王文峰万美琳卢仕
Owner HUBEI UNIV