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Optical tracking method and apparatus

An optical tracking, horizontal direction technology, applied in the field of positioning, can solve problems affecting tracking accuracy, calculation errors, etc., to achieve the effect of improving tracking accuracy

Active Publication Date: 2018-02-06
BEIJING SWEET TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the motor speed will be changed by factors such as installation location, working environment, and use time, using a constant motor speed to determine the three-dimensional coordinates will cause calculation errors and affect tracking accuracy

Method used

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  • Optical tracking method and apparatus

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Experimental program
Comparison scheme
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Embodiment 1

[0027] Such as figure 1 As shown, the optical tracking method provided by the embodiment of the present invention includes:

[0028] Step 101 , for at least two preset transmitters, receive horizontal scanning signals and vertical scanning signals emitted by the transmitters through at least two preset calibrators directly in front of each transmitter.

[0029] In this embodiment, the number of calibrators arranged directly in front of each transmitter may be 2, and the number of calibrators may be greater than 2 in order to improve calibration accuracy.

[0030] Step 102, according to at least two preset calibrators directly in front of each emitter receiving the horizontal scanning signal and the vertical scanning signal emitted by the emitter, and obtaining the corresponding horizontal angular velocity and vertical angular velocity of at least two emitters.

[0031] In this embodiment, the process of obtaining the horizontal angular velocity and the vertical angular veloci...

Embodiment 2

[0040] Such as figure 2 As shown, an embodiment of the present invention provides an optical tracking method, including:

[0041] Step 201, judging whether the rotation speed of the preset scanning motor is constant.

[0042] In this embodiment, if it is determined through step 201 that the rotational speed is not constant, step 202 is executed. Wherein, whether the rotational speed is constant can be judged according to whether the change of the rotational speed of the motor is greater than a preset threshold value, which will not be repeated here.

[0043] From step 202 to step 206, obtain horizontal scanning signals and vertical scanning signals received by at least two calibrators, obtain horizontal angular velocity and vertical angular velocity, obtain horizontal scanning signals and vertical scanning signals received by the receiver, obtain image coordinates and Optical tracking based on image coordinates. The process is related to figure 1 Steps 101 to 105 shown ar...

Embodiment 3

[0050] Such as Figure 4 As shown, the optical tracking device provided in this embodiment includes:

[0051] Receiver 401, processor 402, at least two transmitters 403 and at least four calibrators 404; the processor is connected to the receiver, at least two transmitters and at least four calibrators respectively; the front of each transmitter is arranged at least two calibrators;

[0052] The processor is configured to control the at least two transmitters to sequentially transmit a horizontal direction scanning signal and a vertical direction scanning signal;

[0053] The receiver is configured to receive the horizontal direction scanning signal and the vertical direction scanning signal successively transmitted by the transmitter;

[0054] Each calibrator is used to receive the horizontal direction scanning signal and the vertical direction scanning signal emitted by the transmitter directly in front of it;

[0055] The processor is further configured to receive the ho...

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PUM

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Abstract

The application relating to the field of positioning discloses an optical tracking method and apparatus so that a problem that a calculation error is caused by using a constant motor speed to determine a three-dimensional coordinate and thus the tracking accuracy is affected in the prior art can be solved. The method comprises: according to a horizontal scanning signal and a vertical scanning signal that are transmitted by each transmitter and are received by at least two calibrators preset right in front of each transmitter, horizontal scanning signals and vertical scanning signals that are transmitted by the at least two transmitters and are received by a preset receiver successively, and horizontal angular velocity values and vertical angular velocity values corresponding to the at least two transmitters, image coordinates of the receiver in the at least two transmitters are obtained; and according to the image coordinates of the receiver in the at least two transmitters, optical tracking is carried out. The optical tracking method and apparatus can be applied to fields needing precise positioning, like action capturing, surgical navigation, and virtual reality.

Description

technical field [0001] The present disclosure generally relates to the field of positioning, and in particular, to an optical tracking method and device. Background technique [0002] At present, precise tracking and positioning of users is required in fields such as motion capture, surgical navigation, and virtual reality. Taking Virtual Reality (VR) as an example, in a virtual reality environment, users need to be positioned in real time to adapt to what they see through virtual glasses, virtual helmets, etc., or to prevent users from bumping into other users or objects. [0003] In the prior art, the optical tracking method is generally used for real-time positioning. The specific process includes: firstly, a frame synchronous scanning signal is transmitted through the transmitter, and then the X direction and the Y direction are scanned sequentially. By collecting the laser scanning signal and preset motor The rotational speed determines the three-dimensional coordinate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16
CPCG01S5/16
Inventor 李冬
Owner BEIJING SWEET TECH CO LTD