Laser-based image measurement method, system and apparatus

Abstract

The invention relates to the field of measurement and particularly to a laser-based image measurement method, system and apparatus. The image measurement method comprises steps of: presetting the initial position of a camera, rotating the camera in order that a capture area is located in the display area of the camera, and obtaining a camera rotation angle value; adjusting the direction of a laser beam emitted by a laser device on the camera in order that a laser spot located in the capture area is located at the center of the display area of the camera, and capturing a two-dimensional image; obtaining the translation value of the camera according to the distance acquired by the laser from the camera to the capture area; acquiring a preset camera internal parameter, and calculating a mapping relation between the two-dimensional image of the capture area and a three-dimensional world space according to the camera rotation angle value, the translation value of the camera, and the camera internal parameter; and acquiring the coordinate value of the object to be measured on the two-dimensional image, substituting the coordinate value into the mapping relation between the two-dimensional image and the three-dimensional world space, and calculating the measured value of the object to be measured in the three-dimensional world space.

Description

technical field [0001] The invention relates to the field of measurement, in particular to a laser-based image measurement method, system and device. Background technique [0002] With the development of science and technology, measurement methods have also changed. Traditional measurement methods require manual running points, low efficiency, poor accuracy, and long time. Using new measurement methods such as ultrasonic waves and lasers, for the measurement of different targets, different laser positioning operations and calculations are required manually, with large errors and cumbersome steps. Moreover, for construction sites that need to detect construction site materials (such as steel bars, etc.), due to the large number of site materials, laser measurement takes a long time, but the construction period cannot be stopped. Once the cement is covered, it can no longer pass. Laser measurement detects materials on site. The image-based measurement technology is more flex...

AI Technical Summary

Problems solved by technology

The disadvantage is that the calibration process is time-consuming and laborious, and it is not suitable for online calibration and occasions where manual measurement or calibration templates cannot be used

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