Determining sensor installation characteristics from camera image

Patent metadata

Field	Value
Publication number	US-11113828-B2
Application number	US-201615216964-A
Country	US
Kind code	B2
Filing date	Jul 22, 2016
Priority date	Jul 22, 2016
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

An image of at least a portion of a room may be received, the image of the room comprising an image of a sensor mounted in the room. At least one optical parameter related to the image of the room may also be received. A distance may be determined between the sensor and a camera that captured the image of the room, wherein the determination of the distance is based at least in part on the optical parameters and on known physical dimensions of the sensor. A sensitivity requirement of the sensor may be determined, based on the distance. The determined sensitivity may be sent to control logic of the sensor.

First claim

The invention claimed is:

1. A computer-implemented method comprising:
receiving an image of at least a portion of a room, the image of the room comprising an image of a sensor mounted in the room;
receiving at least one optical parameter related to the image of the room;
determining a distance between the sensor and a camera that captured the image of the room, wherein the determination of the distance is based at least in part on the image of the room, on the optical parameters, and on known physical dimensions of the sensor;
determining a sensitivity requirement of the sensor, based on the distance;
sending the determined sensitivity requirement to control logic of the sensor; and
configuring the sensor to operate at the determined sensitivity requirement to determine an alarm event.

2. The method of claim 1 , wherein the sensor comprises a motion detector.

3. The method of claim 1 , further comprising:
using the image, determining a height of the sensor above a floor of the room, wherein the determination of the height is based at least in part on the optical parameters and on the known physical dimensions of the sensor.

4. The method of claim 3 , further comprising:
determining if the height of the sensor is within an appropriate range of heights; and
if not, outputting an alert signal.

5. The method of claim 4 , wherein the alert signal results in a communication through a user interface, the communication suggesting relocation of the sensor.

6. The method of claim 1 , further comprising:
using the image, determining a separation between the sensor and a source of infrared radiation (IR) in the room, wherein the determination of the separation is based at least in part on the optical parameters and on the known physical dimensions of the sensor.

7. The method of claim 6 , further comprising:
determining if the separation is greater than a predefined threshold; and
if not, outputting an alert signal.

8. The method of claim 7 , wherein the alert signal results in a communication through a user interface, the communication suggesting relocation of the sensor.

9. The method of claim 6 , wherein the source of IR comprises one of:
a window;
a door;
a heating, ventilation, or air conditioning (HVAC) vent; or
an appliance.

10. A system comprising:
a processor; and
a memory in communication with the processor, wherein the memory stores instructions that, when executed by the processor, cause the processor to:
receive an image of at least a portion of a room, the image of the room comprising an image of a sensor mounted in the room;
receive at least one optical parameter related to the image of the room;
determine a distance between the sensor and a camera that captured the image of the room, wherein the determination of the distance is based at least in part on the image of the room, on the optical parameters, and on known physical dimensions of the sensor;
determine a sensitivity requirement of the sensor, based on the distance;
send the determined sensitivity requirement to control logic of the sensor;
configure the sensor to operate at the determined sensitivity requirement to determine an alarm event.

11. The system of claim 10 , wherein the sensor comprises a motion detector.

12. The system of claim 10 , wherein the instructions further cause the processor to:
using the image, determine a height of the sensor above a floor of the room, wherein the determination of the height is based at least in part on the optical parameters and on the known physical dimensions of the sensor.

13. The system of claim 12 , wherein the instructions further cause the processor to:
determine if the height of the sensor is within an appropriate range of heights; and
if not, outputting an alert signal.

14. The system of claim 13 , wherein the alert signal results in a communication through a user interface, the communication suggesting relocation of the sensor.

15. The system of claim 10 , wherein the instructions further cause the processor to:
using the image, determine a separation between the sensor and a source of infrared radiation (IR) in the room, wherein the determination of the separation is based at least in part on the optical parameters and on the known physical dimensions of the sensor.

16. The system of claim 15 , wherein the instructions further cause the processor to:
determine if the separation is greater than a predefined threshold; and
if not, outputting an alert signal.

17. The system of claim 16 , wherein the alert signal results in a communication through a user interface, the communication suggesting relocation of the sensor.

18. The system of claim 15 , wherein the source of IR comprises one of:
a window;
a door;
a heating, ventilation, or air conditioning (HVAC) vent; or
an appliance.

19. The method of claim 1 , wherein the at least one optical parameter includes a zoom parameter.

20. The method of claim 1 , wherein the alarm event is based on the sensor detecting a security event or an environmental event.

Assignees

• Google Inc
• Google Llc

Inventors

• Herman Kenneth Louis
• Purohit Aveek Ravishekhar
• James Bryan
• Malhotra Mark Rajan
• Modi Yash

Classifications

• G08B13/19602

  Image analysis to detect motion of the intruder, e.g. by frame subtraction · CPC title

• G06T2207/10048

  Infrared image · CPC title

• G06T2207/30232

  Surveillance · CPC title

• G06T7/50 Primary

  Depth or shape recovery · CPC title

• G08B29/22

  Provisions facilitating manual calibration, e.g. input or output provisions for testing; Holding of intermittent values to permit measurement · CPC title