TOF rapid calibration device and method
A calibration device and TOF camera technology, which is applied in the TOF field, can solve the problems of high precision of guide rail control, large space occupation, and low calibration efficiency
Inactive Publication Date: 2019-06-28
WUHAN JUXIN MICROELECTRONICS CO LTD
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Problems solved by technology
The guide rail method has the following problems: (1) takes up a lot of space; (2) the calibration efficiency is low; (3) the guide rail control accuracy is high, and the calibration accuracy is low in actual operation
Using this correction method has the following problems: this method can only obtain the wiggling error of the local area of the depth image at each calibration distance, and using the calibration error of the local area to perform full-image correction will inevitably lead to low calibration accuracy
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[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0024] The existing TOF technology mainly contains the following sources of error: 1) Periodic error caused by fundamental harmonics, also called "wiggling"'; 2) Error caused by temperature change; 3) Error caused by change in incident light intensity ; 4) Errors caused by different integration times. Therefore, if you want to achieve higher prec...
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The invention provides a TOF rapid calibration device and method. A fiber calibrating plate and a calibration plate clamping groove are arranged, the fiber calibrating plate includes light diffusers in uniform distribution, the light diffusers are connected with optical fibers respectively, and the fibers are used to calibrate a wiggling error and an error caused by the incident light intensity ofa TOF camera; the calibration plate clamping groove changes the rotation angle to test influence of different inclination angles on the measuring precision, different calibration plates and test cards can placed in the clamping grooves in a drawing manner, so that internal and external parameters, radial distortion parameters, a pixel offset errors and an error caused by integration time of the TOF camera can be calibrated; and the calibration plate clamping groove and the fiber calibrating plate are both arranged on a casing, so that self-service configuration can be realized according to demands, and calibration with different requirements can be realized.
Description
technical field [0001] Embodiments of the present invention relate to the technical field of TOF, and more specifically, relate to a TOF rapid calibration device and method. Background technique [0002] As one of the mainstream 3D imaging technologies today, TOF (Time of Flight) technology has achieved rapid development in recent years, especially in the realization of 3D face recognition, scene recognition, and three-dimensional perception on the mobile terminal. A major breakthrough has attracted much attention recently. Its working principle is that a modulated near-infrared light pulse signal is sent out through the sensor, and the signal is reflected after encountering an object. The camera sensor receives the reflected light signal, and uses the phase difference between the emitted light and the reflected light to calculate the shooting scene and the camera. distance, thus generating depth information. [0003] Compared with stereo camera or triangulation measuremen...
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Inventor 明幼林王抒昂柯毅张璁毅李毕锋
Owner WUHAN JUXIN MICROELECTRONICS CO LTD