# US 11,113,828 B2 · Determining sensor installation characteristics from camera image

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- Number: US 11,113,828 B2
- Document ID: US11113828B2
- Status: Granted
- Kind: B2
- Application number: 15/216,964
- Filed: 2016-07-22
- Published: 2018-01-25
- Granted: 2021-09-07
- Earliest claimed: 2016-07-22
- Assignees: Google Inc.
- Applicants: Google Inc.
- Inventors: Kenneth Louis Herman; Aveek Ravishekhar Purohit; Bryan James; Mark Rajan Malhotra; Yash Modi
- Web page: https://patentgrep.com/patent/US11113828B2

## CPC

- G06T 7/50: Depth or shape recovery
- G08B 13/19602: {Image analysis to detect motion of the intruder, e.g. by frame subtraction}
- G08B 13/19636: {pertaining to the camera}
- G06T 2207/10048: Infrared image
- G06T 2207/30232: Surveillance
- G08B 29/22: Provisions facilitating manual calibration, e.g. input or output provisions for testing; Holding of intermittent values to permit measurement
- G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 3)

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.

### Claim 5 (depends on 4)

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

### Claim 6 (depends on 1)

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.

### Claim 7 (depends on 6)

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

### Claim 8 (depends on 7)

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

### Claim 9 (depends on 6)

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.

### Claim 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.

### Claim 11 (depends on 10)

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

### Claim 12 (depends on 10)

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.

### Claim 13 (depends on 12)

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.

### Claim 14 (depends on 13)

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

### Claim 15 (depends on 10)

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.

### Claim 16 (depends on 15)

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.

### Claim 17 (depends on 16)

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

### Claim 18 (depends on 15)

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.

### Claim 19 (depends on 1)

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

### Claim 20 (depends on 1)

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