Optical axis calibration method, device, terminal, system and medium of optical axis detection system
A detection system and calibration method technology, applied in the field of optics, can solve problems such as low accuracy and large optical axis error, and achieve the effects of improving accuracy, reducing processing accuracy requirements, and reducing design and processing requirements
Active Publication Date: 2022-05-24
SHENZHEN ORBBEC CO LTD
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[0003] However, the existing optical axis calibration method has higher requirements on the jig in contact with the reference plane in the optical axis detection equipment. Considering the structural tolerance and assembly tolerance of the jig, the obtained optical axis has a large error and low accuracy.
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[0034] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.
[0035] In 3D depth sensors such as monocular or active binocular based on the principle of triangulation ranging, indirect measurement of flight time, direct measurement of flight time, etc., the speckle formed by the speckle emission module is generally collected by the receiving module to obtain depth information. . The size of the included angle between the speckle transmit...
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The application is applicable to the field of optics, and provides an optical axis calibration method, device, terminal, system and medium of an optical axis detection system. Wherein, the optical axis calibration method includes: acquiring the first speckle image and the second speckle image respectively acquired before and after the rotation of the speckle emitting device; extracting at least two first speckle points in the first speckle image, and For the second speckle point corresponding to the first speckle point in the second speckle image, obtain at least two line segments formed by connecting the first speckle point and the second speckle point corresponding to the first speckle point in the same image coordinate system ;Calculate the perpendicular of each line segment, and determine the reference point of the optical axis according to the intersection of each perpendicular. The method provided by the embodiments of the present application can reduce the influence of jig tolerance on optical axis calibration, and improve the accuracy of optical axis calibration.
Description
technical field [0001] The present application belongs to the field of optics, and in particular relates to an optical axis calibration method, device, terminal, system and medium of an optical axis detection system. Background technique [0002] In 3D depth sensors such as monocular or active binocular, indirect measurement of time of flight (Indirect TOF, iTOF), direct measurement of time of flight (Direct TOF, dTOF) and other 3D depth sensors based on the principle of triangulation ranging, the receiver module (RX for short) is generally used. module) to collect the speckle formed by the emission of the speckle transmission module (referred to as the TX module) to obtain depth information. In order to ensure the reliability of the depth information, it is necessary to control the angle between the optical axis of the speckle emission module and the reference plane. Therefore, it is necessary to detect the optical axis of the speckle emission module, determine the landing...
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IPC IPC(8): G01B11/02G06T7/80
CPCG01B11/02G06T7/80G06T2207/30204H04N17/002G06T7/73G06T2207/10016G06T2207/10004G06T5/80
Inventor 郑德金段彦旭武万多
Owner SHENZHEN ORBBEC CO LTD