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Line laser center extraction method

An extraction method, line laser technology, applied in image data processing, instrumentation, computing, etc., can solve problems such as narrow application range, poor robustness, and slow extraction speed

Active Publication Date: 2020-08-14
苏州中科行智智能科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the method for extracting the center of the line laser in the prior art, the extraction method has poor robustness, slow extraction speed, low precision, and narrow application range.

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Embodiment Construction

[0072] The following is a detailed description through specific embodiments to illustrate the technical solution of the present invention.

[0073] The main objects of the present invention are such as figure 1 with 2 As shown, the surface of the metal iron block and the screw surface. The line laser image shown in the figure has the situation that the reflection is not concentrated and the brightness of the local area is different. Therefore, the robustness of the algorithm is very high. For the real center point, the brightness of the normal direction of the laser strip must be fully utilized. Information, select the appropriate model to determine the center point coordinates. The main flow of the algorithm is as image 3 As shown, in order to increase the speed of the algorithm, calculations are performed only when the algorithm is executed when the threshold is greater than T, so there are very few points that really need to be calculated. Because the background of the line ...

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Abstract

The invention discloses a line laser center extraction method, and belongs to the technical field of industrial measurement. The method comprises the following steps: firstly performing threshold processing to remove most of redundant calculation and improve the calculation speed and efficiency; calculating the direction of a target point by using a polynomial technology; and according to the direction of the target point, recording the data of the cache points in the k / 2 pixel ranges on the two sides of the target point; and finally, adopting a one-dimensional Gaussian model to extract coordinates of a line laser sub-pixel center point. The method has the advantages of high calculation speed, interference resistance, convenience in hardware implementation and the like.

Description

Technical field [0001] The invention belongs to the technical field of industrial measurement, and specifically relates to a method for extracting a line laser center. Background technique [0002] The line laser 3D measuring instrument is widely used in the field of industrial measurement, and the main method adopted is the triangulation method. The structured light stripes irradiate the surface of the object. Through the conversion of system coordinates, the two-dimensional information of the image generated on the surface of the object is converted into three-dimensional information, and the contour of the object surface is obtained, and then the subsequent point cloud operation and size measurement are performed, so the two-dimensional line The extraction of the laser center is one of its most important components. The accuracy of the line laser measuring instrument mainly depends on the relative position between the line laser and the CMOS camera and the depth of the object...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/136G06T7/73
CPCG06T7/0004G06T7/136G06T7/75
Inventor 邢述达汪雪林顾庆毅
Owner 苏州中科行智智能科技有限公司
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