Image detection and processing for building control
First Claim
1. An apparatus, comprising:
- at least one image sensor;
a controller, wherein at least one of the controller, or an external controller electronically connected to the controller are operative to;
obtain a plurality of images from the image sensor;
determine a color difference image of a color difference between consecutive images;
determine areas of the color difference image wherein the color difference is greater than a threshold;
calculate a total change area as an aggregate area of the determined areas;
create a list of occupancy candidates based on filtering of the determined areas if the total change area is less than a light change threshold, wherein each occupancy candidate is represented by a connected component;
track the one or more occupancy candidates over a period of time; and
detect occupancy if one or more of the occupancy candidates is detected to have moved more than a movement threshold over the period of time.
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Accused Products
Abstract
Occupancy detection for building environmental control is disclosed. One apparatus includes at least one image sensor and a controller, wherein the controller is operative to obtain a plurality of images from the image sensor, determine a color difference image of a color difference between consecutive images, determine areas of the color difference image wherein the color difference is greater than a threshold, calculate a total change area as an aggregate area of the determined areas, create a list of occupancy candidates based on filtering of the determined areas if the total change area is less than a light change threshold, wherein each occupancy candidate is represented by a connected component, track the one or more occupancy candidates over a period of time, and detect occupancy if one or more of the occupancy candidates is detected to have moved more than a movement threshold over the period of time.
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Citations
10 Claims
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1. An apparatus, comprising:
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at least one image sensor; a controller, wherein at least one of the controller, or an external controller electronically connected to the controller are operative to; obtain a plurality of images from the image sensor; determine a color difference image of a color difference between consecutive images; determine areas of the color difference image wherein the color difference is greater than a threshold; calculate a total change area as an aggregate area of the determined areas; create a list of occupancy candidates based on filtering of the determined areas if the total change area is less than a light change threshold, wherein each occupancy candidate is represented by a connected component; track the one or more occupancy candidates over a period of time; and detect occupancy if one or more of the occupancy candidates is detected to have moved more than a movement threshold over the period of time. - View Dependent Claims (2, 3, 4, 5)
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6. A method of detecting occupancy, comprising:
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obtaining a plurality of images; determining a color difference image of a color difference between consecutive images; determining areas of the color difference image wherein the color difference is greater than a threshold; calculating a total change area as an aggregate area of the determined areas; creating a list of occupancy candidates based on filtering of the determined areas if the total change area is less than a light change threshold, wherein each occupancy candidate is represented by a connected component; tracking the one or more occupancy candidates over a period of time; and detecting occupancy if one or more of the occupancy candidates is detected to have moved more than a movement threshold over the period of time. - View Dependent Claims (7, 8, 9, 10)
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Specification