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A monocular vision measurement method and device

A monocular vision and measurement method technology, applied in the direction of measurement devices, optical devices, instruments, etc., can solve the problems of complex calibration process and inability to complete target measurement, and achieve the effect of convenient detection and wide application range.

Active Publication Date: 2018-04-17
SHENZHEN SUNWIN INTELLIGENT CO LTD
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Problems solved by technology

However, the traditional camera calibration method needs to use a calibration board, so the calibration process is complicated, and in some occasions such as on the highway, the calibration board cannot be used under the busy road, so the measurement of the target cannot be completed

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  • A monocular vision measurement method and device
  • A monocular vision measurement method and device
  • A monocular vision measurement method and device

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Embodiment Construction

[0015] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0016] Glossary:

[0017] Camera calibration formula: In the image measurement process and machine vision applications, in order to determine the relationship between the three-dimensional geometric position of a point on the surface of a space object and its corresponding point in the image, a geometric model of camera imaging must be established. These geometric model parameters are Camera parameters. Under most conditions, these parameters must be obtained through experiments and calculations. This process of solving parameters is called camera calibration (or camera calibration). Currently, the most popular offline camera calibration algorithm is proposed by Tsai in 1987 [Tsai1987] , the Tsai method uses a three-dimensional calibratio...

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Abstract

The invention discloses a monocular vision measurement method, which comprises the steps of: S1, acquiring an image taken by an imaging device; S2, calculating the vanishing point of the image in the X-axis, Y-axis and Z-axis directions; S3, according to Camera calibration formula and the transformation matrix of the image from world coordinates to image coordinates calculated by the vanishing point; S4, extracting the target to be detected in the image and the distance and height of the reference object; S5, according to the distance and height of the reference object Calculate the inverse matrix from the image coordinates to the world coordinates with the conversion matrix; S6, calculate the height and width of the target to be detected according to the inverse matrix. The invention also discloses a monocular vision measuring device. The measuring method and device of the invention do not need to use a calibration plate, and the calibration process is more flexible and convenient.

Description

technical field [0001] The invention relates to the field of computer image processing, in particular to a monocular vision measurement method and device. Background technique [0002] Visual measurement technology is one of the key applications of computer vision technology. In the visual measurement technology, the image sensor with small distortion and low noise is used for real-time and fast image acquisition, and the image processing system is used to analyze and process the collected images to complete the measurement of the target. Vision measurement can be divided into monocular, binocular and multi-eye vision measurement systems according to the number of cameras. Monocular vision measurement captures the measured object through the camera, obtains the imaging information of the measured object through image processing, and obtains the size information of the measured object through the corresponding relationship between the two-dimensional imaging plane and the th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/03
Inventor 陈雁刘春秋林昶荣陈敏胡祝银孙凯
Owner SHENZHEN SUNWIN INTELLIGENT CO LTD
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