SYSTEM AND METHOD FOR ADAPTIVE INFRARED EMITTER POWER OPTIMIZATION FOR SIMULTANEOUS LOCALIZATION AND MAPPING

• US 20200133300A1
• Filed: 10/29/2018
• Published: 04/30/2020
• Est. Priority Date: 10/29/2018
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Iyer, Vivek Viswanathan, Yildiz, Yagiz C.
• Granted Patent: US 10,860,032 B2
• Time in Patent Office: Days
• CPC Class Codes: G01C 21/20 Instruments for performing navigational calculations G01C21/24, G01C21/26 take precedence
• CPC Class Codes: G01C 25/005 initial alignment, calibration or starting-up of inertial devices
• CPC Class Codes: G01S 19/48 by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system
• CPC Class Codes: G01S 5/16 using electromagnetic waves other than radio waves
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0187 slaved to motion of at least a part of the body of the user, e.g. head, eye
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G05D 1/0246 using a video camera in combination with image processing means
• CPC Class Codes: G05D 1/0272 comprising means for registering the travel distance, e.g. revolutions of wheels measuring distance traversed on the ground by vehicles, e.g. using odometers G01C22/00
• CPC Class Codes: G06F 18/2111 by using evolutionary computational techniques, e.g. genetic algorithms
• CPC Class Codes: G06F 18/254 of classification results, e.g. of results related to same input data
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06F 3/012 Head tracking input arrangements
• CPC Class Codes: G06V 10/143 Sensing or illuminating at different wavelengths
• CPC Class Codes: G06V 20/20 in augmented reality scenes
• CPC Class Codes: G06V 40/103 Static body considered as a whole, e.g. static pedestrian or occupant recognition

Abstract

A wearable headset information handling system infrared emitter power optimization system may comprise a memory storing an association between an active infrared (IR) light emitter mounted to the wearable headset and a calibration intensity at which the IR light emitter emits light during a calibration phase, wherein the active IR light emitter is identified based on its position with respect to the field of view of the wearable headset. A SLAM engine may determine a calibration distance between the active IR light emitter and a first farthest identified object and determine an image projection distance between the active IR light emitter and a nearby virtual object. The processor may determine a first light intensity cap for the active IR light emitter based on the calibration distance, the calibration intensity, and the image projection distance, and the active IR light emitter may emit light according to the first light intensity cap.

Claims

1. A wearable headset information handling system infrared emitter power optimization system comprising:

a memory storing an association between each of a plurality of infrared (IR) light emitters mounted to a wearable headset and a calibration intensity at which an associated one of the plurality of IR light emitters emits light while a calibration simultaneous localization and mapping (SLAM) frame is generated;

a SLAM engine generating a first session SLAM frame;

a processor identifying an active IR light emitter from the plurality of infrared light emitters based on a position of the active IR light emitter with respect to a field of view of the wearable headset;

a SLAM engine determining a calibration distance between the active IR light emitter and a first farthest identified object based on the calibration SLAM frame, and determining an image projection distance between the active IR light emitter and a nearby virtual object, based on the first session SLAM frame;

the processor executing infrared emitter power optimization system code instructions to determine a first light intensity cap for the active IR light emitter based on the calibration distance, the calibration intensity, and the image projection distance; and

the active IR light emitter emitting light at or below the first light intensity cap.

2. The information handling system of claim 1, wherein the calibration distance and the calibration intensity are linearly related.

3. The information handling system of claim 1, wherein the active IR light emitter is located within a minimum active region that includes a field of view of the wearable headset and a preset peripheral angle extending from both edges of the field of view.

4. The information handling system of claim 3, wherein the active IR light emitter is located within a rotation active region that includes a preset movement adjustment angle extending from an edge of the minimum active region in a detected direction of rotation further comprising:

an inertial measurement unit detecting rotation of the wearable headset.

5. The information handling system of claim 1 further comprising:

the SLAM engine identifying a bearing to a virtual object; and

wherein the active IR light emitter is located in an active region that includes a preset peripheral angle extending in both horizontal directions from the bearing of the virtual object.

6. The information handling system of claim 1 further comprising:

the processor determining a second light intensity cap for the active IR light emitter based on an updated distance measured between the active IR light emitter and a farthest identified object in the first session SLAM frame, the first light intensity cap, and a second image projection distance of a virtual object depicted in a future predicted SLAM frame; and

the active IR light emitter emitting light at or below the second light intensity cap.

7. The information handling system of claim 6, wherein the future predicted SLAM frame is within thirty frames of the first session SLAM frame.

8. A method of optimizing power of an infrared emitter comprising:

storing an association in a memory between each of a plurality of infrared (IR) light emitters mounted to a wearable headset and a calibration intensity at which an associated one of the plurality of IR light emitters emits light while a calibration simultaneous localization and mapping (SLAM) frame is generated;

receiving, via a network adapter, a calibration SLAM frame, a first session SLAM frame, and a future predicted SLAM frame;

identifying an active IR light emitter from the plurality of infrared light emitters, via a processor, based on a position of the active IR light emitter with respect to a field of view of the wearable headset;

determining, via the processor, a calibration distance between the active IR light emitter and a first farthest identified object based on the calibration SLAM frame, and determining an image projection distance between the active IR light emitter and a nearby virtual object, based on the predicted future SLAM frame;

determining, via the processor, a first light intensity cap for the active IR light emitter based on the calibration distance, the calibration intensity, and the image projection distance; and

transmitting an instruction to the wearable headset, via the network adapter, to emit light from the active IR light emitter at or below the first light intensity cap.

9. The method of claim 8, wherein the calibration distance and the calibration intensity are linearly related.

10. The method of claim 8, wherein the active IR light emitter is located within a minimum active region that includes a field of view of the wearable headset and a preset peripheral angle extending from both edges of the field of view.

11. The method of claim 10, wherein the active IR light emitter is located within a rotation active region that includes a preset movement adjustment angle extending from an edge of the minimum active region in a detected direction of rotation further comprising:

an inertial measurement unit detecting rotation of the wearable headset.

12. The method of claim 8 further comprising:

the SLAM engine identifying a bearing to a virtual object based on the future predicted SLAM frame; and

wherein the active IR light emitter is located in an active region that includes a preset peripheral angle extending in both horizontal directions from the bearing of the virtual object.

13. The method of claim 8, wherein the predicted future SLAM frame is within a preset threshold number of frames of the first session SLAM frame.

14. The method of claim 13, wherein the preset threshold number of frames is between fifteen and forty five frames.

15. A wearable headset information handling system infrared emitter power optimization system comprising:

a memory storing an association between each of a plurality of infrared (IR) light emitters mounted to a wearable headset and a calibration intensity at which an associated one of the plurality of IR light emitters emits light while a calibration simultaneous localization and mapping (SLAM) frame is generated;

wherein the active IR light emitter is located within a minimum active region that includes a field of view of the wearable headset and a preset peripheral angle extending from both edges of the field of view;

a SLAM engine generating a first session SLAM frame;

a processor identifying an active IR light emitter from the plurality of infrared light emitters based on a position of the active IR light emitter with respect to the field of view of the wearable headset;

a SLAM engine determining a calibration distance between the active IR light emitter and a first farthest identified object based on the calibration SLAM frame, and determining an image projection distance between the active IR light emitter and a nearby virtual object, based on the first session SLAM frame;

the processor executing infrared emitter power optimization system code instructions to determine a first light intensity cap for the active IR light emitter based on the calibration distance, the calibration intensity, and the image projection distance; and

the active IR light emitter emitting light at or below the first light intensity cap.

16. The information handling system of claim 15, wherein the calibration distance and the calibration intensity are linearly related.

17. The information handling system of claim 15, wherein the active IR light emitter is located within a rotation active region that includes a preset movement adjustment angle extending from an edge of the minimum active region in a detected direction of rotation further comprising:

an inertial measurement unit detecting rotation of the wearable headset.

18. The information handling system of claim 15 further comprising:

the SLAM engine identifying a bearing to a virtual object; and

wherein the active IR light emitter is located in an active region that includes a preset peripheral angle extending in both horizontal directions from the bearing of the virtual object.

19. The information handling system of claim 15 further comprising:

the processor determining a second light intensity cap for the active IR light emitter based on an updated distance measured between the active IR light emitter and a farthest identified object in the first session SLAM frame, the first light intensity cap, and a second image projection distance of a virtual object depicted in a future predicted SLAM frame; and

the active IR light emitter emitting light at or below the second light intensity cap.

20. The information handling system of claim 19, wherein the future predicted SLAM frame is within thirty frames of the first session SLAM frame.