Control method for optical tracking system

• US 10,530,972 B2
• Filed: 09/07/2017
• Issued: 01/07/2020
• Est. Priority Date: 09/21/2016
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Tseng, Mong-Yu, Wu, Sheng-Long
• Primary Examiner(s): Bost, Dwayne D
• Assistant Examiner(s): Brinich, Stephen M
• Application Number:
  US15/697,468
• Publication Number:
  US 20180084158A1
• Time in Patent Office: 852 Days
• Field of Search: 382154, 382298, 382103-104, 382106-107, 382100
• CPC Class Codes: G01S 11/12 using electromagnetic waves other than radio waves
• CPC Class Codes: G01S 5/16 using electromagnetic waves other than radio waves
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06T 7/80 Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
• CPC Class Codes: H04N 5/222 Studio circuitry; Studio devices; Studio equipment cameras or camera modules comprising electronic image sensors, or control thereof H04N23/00

Abstract

An optical tracking system includes optical source devices. The optical source devices are configured to emitting optical signals. A control method, suitable for the optical tracking system, includes following operations. A dimensional scale to be covered by the optical tracking system is obtained. Signal strength of the optical signals provided by the optical source devices is adjusted according to the dimensional scale. The signal strength of the optical signals is positively correlated with the dimensional scale.

Claims

1. A control method, suitable for an optical tracking system comprising a plurality of optical source devices and being configured to track a position of an electronic device, the optical source devices being configured to emitting a plurality of optical signals, the electronic device comprising an optical sensing module configured to sense a plurality of detection signals corresponding to the optical signals from the optical source devices, the control method comprising:

calculating a plurality of gap distances between the optical source devices and the electronic device respectively according to the detection signals;

obtaining a dimensional scale to be covered by the optical tracking system according to the gap distances; and

adjusting a signal strength of the optical signals provided by the optical source devices according to the dimensional scale, wherein the signal strength of the optical signals is positively correlated with the dimensional scale.

2. The control method of claim 1, wherein the optical tracking system is configured to track a position of an electronic device, the electronic device comprises an optical sensing module is configured to sense a plurality of detection signals corresponding to the optical signals from the optical source devices, the control method further comprises:

adjusting a sensing sensitivity of the optical sensing module on the electronic device according to the dimensional scale, wherein the sensing sensitivity of the optical sensing module is negatively correlated with the dimensional scale.

3. The control method of claim 1, wherein the optical tracking system is configured to track a position of an electronic device, the electronic device comprises an optical sensing module is configured to sense a plurality of detection signals corresponding to the optical signals from the optical source devices, the control method further comprises:

reducing the signal strength of the optical signals in response to that an unexpected event is detected by the optical sensing module in the detection signals.

4. The control method of claim 3, wherein each of the optical signals is generated according to a predetermined emitting pattern, the unexpected event is detected when the detection signals comprises an unexpected radiation pulse over the predetermined emitting pattern.

5. The control method of claim 3, wherein the control method further comprises:

increasing the signal strength of the optical signals in response to that the optical sensing module fails to detect an expected event within the detection signals.

6. The control method of claim 5, wherein each of the optical signals is generated according to a predetermined emitting pattern, the expected event comprises a plurality of periodic radiation pulses corresponding to the predetermined emitting pattern.

7. A control method, suitable for an optical tracking system comprising a plurality of optical source devices, the optical source devices being configured to emitting a plurality of optical signals, the optical tracking system being configured to track a position of an electronic device, the electronic device comprising an optical sensing module configured to sense a plurality of detection signals corresponding to the optical signals from the optical source devices, the control method comprising:

reducing a signal strength of the optical signals in response to that an unexpected event is detected by the optical sensing module in the detection signals; and

increasing the signal strength of the optical signals in response to that the optical sensing module fails to detect an expected event within the detection signals,

wherein each of the optical signals is generated according to a predetermined emitting pattern, the unexpected event is detected when the detection signals comprises an unexpected radiation pulse over the predetermined emitting pattern.

8. The control method of claim 7, wherein each of the optical signals is generated according to a predetermined emitting pattern, the expected event comprises a plurality of periodic radiation pulses corresponding to the predetermined emitting pattern.

9. An optical tracking system, comprising:

a plurality of optical source devices, the optical source devices being configured to emitting a plurality of optical signals; and

a control module communicated with the optical source devices, the control module is configured to obtain a dimensional scale to be covered by the optical tracking system, and to adjust a signal strength of the optical signals provided by the optical source devices according to the dimensional scale, the control module adjusts the signal strength in positive correlation with the dimensional scale,

wherein the optical tracking system is configured to track a position of an electronic device the electronic device comprises an optical sensing module is configured to sense a plurality of detection signals corresponding to the optical signals from the optical source devices, the control module calculates a plurality of gap distances between the optical source devices and the electronic device respectively according to the detection signals, and the control module calculates the dimensional scale according to the gap distances.

10. The optical tracking system of claim 9, wherein the optical tracking system is configured to track a position of an electronic device, the electronic device comprises an optical sensing module is configured to sense a plurality of detection signals corresponding to the optical signals from the optical source devices, the control module adjusts a sensing sensitivity of the optical sensing module on the electronic device according to the dimensional scale, the sensing sensitivity of the optical sensing module is adjusted in negative correlation with the dimensional scale.

11. The optical tracking system of claim 9, wherein the optical tracking system is configured to track a position of an electronic device, the electronic device comprises an optical sensing module is configured to sense a plurality of detection signals corresponding to the optical signals from the optical source devices, the control module reduces the signal strength of the optical signals in response to that an unexpected event is detected by the optical sensing module in the detection signals.

12. The optical tracking system of claim 11, wherein each of the optical signals is generated according to a predetermined emitting pattern, the unexpected event is detected when the detection signals comprises an unexpected radiation pulse over the predetermined emitting pattern.

13. The optical tracking system of claim 11, wherein the control module increases the signal strength of the optical signals in response to that the optical sensing module fails to detect an expected event within the detection signals.

14. The optical tracking system of claim 13, wherein each of the optical signals is generated according to a predetermined emitting pattern, the expected event comprises a plurality of periodic radiation pulses corresponding to the predetermined emitting pattern.

15. A control method, suitable for an optical tracking system comprising a plurality of optical source devices, the optical source devices being configured to emitting a plurality of optical signals, wherein a first optical source device of the optical source devices comprises an optical sensor, the optical sensor is configured to sense a detection signal corresponding to one of the optical signals from a second optical source device of the optical source devices, the control method comprising:

calculating a gap distance between the first optical source device and the second optical source device according to the detection signal;

obtaining a dimensional scale to be covered by the optical tracking system according to the gap distance; and

adjusting a signal strength of the optical signals provided by the optical source devices according to the dimensional scale, wherein the signal strength of the optical signals is positively correlated with the dimensional scale.

16. An optical tracking system, comprising:

a plurality of optical source devices, the optical source devices being configured to emitting a plurality of optical signals; and

a control module communicated with the optical source devices, the control module is configured to obtain a dimensional scale to be covered by the optical tracking system, and to adjust a signal strength of the optical signals provided by the optical source devices according to the dimensional scale, the control module adjusts the signal strength in positive correlation with the dimensional scale,

wherein a first optical source device of the optical source devices comprises an optical sensor, the optical sensor is configured to sense a detection signal corresponding to one of the optical signals from a second optical source device of the optical source devices, the control module calculates a gap distance between the first optical source device and the second optical source device according to the detection signal, and the control module calculates the dimensional scale according to the gap distance.