Using infrared images of a monitored scene to identify windows
First Claim
1. A camera system, comprising:
- a memory configured to store information;
a lens assembly arranged to direct light from a scene onto an image sensing element;
an image sensing element configured to receive light from the scene via the lens assembly;
at least one infrared illuminator configured to transmit infrared light; and
a processor, coupled to the image sensing element and the at least one infrared illuminator and configured to;
operate the at least one infrared illuminator and the image sensing element in a first mode whereby infrared light transmitted by the at least one infrared illuminator and reflected from the scene is used to generate a two-dimensional image of the scene; and
operate the at least one infrared illuminator and the image sensing element in a second mode whereby infrared light transmitted by the at least one infrared illuminator and reflected from the scene is used to detect a first region, located within the scene, having a specific material, wherein in the second mode the processor is configured to;
capture a first image of a scene while one or more of the illuminators are activated;
capture a second image of the scene is captured while none of the illuminators are activated;
construct a light intensity map for the scene by subtracting light intensity values from the second image from corresponding light intensity values in the first image;
store to the memory the light intensity map; and
transmit the stored light intensity map to a glass surface detection module configured to identify the first region as a glass surface when the light intensity values for the first region are below a threshold value corresponding to glass.
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Accused Products
Abstract
A camera system includes memory, a lens assembly arranged to direct light from a scene onto an image sensing element, an image sensing element configured to receive light from the scene via the lens assembly, at least one infrared illuminator configured to transmit infrared light, and a processor, coupled to the image sensing element and the illuminators. The processor is configured to operate the illuminators and the image sensing element in a first mode whereby infrared light transmitted by the illuminators and reflected from the scene is used to generate a two-dimensional image of the scene. The processor is also configured to operate the illuminators and the image sensing element in a second mode whereby infrared light transmitted by the illuminators and reflected from the scene is used to detect a first region, located within the scene, having a specific material.
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Citations
17 Claims
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1. A camera system, comprising:
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a memory configured to store information; a lens assembly arranged to direct light from a scene onto an image sensing element; an image sensing element configured to receive light from the scene via the lens assembly; at least one infrared illuminator configured to transmit infrared light; and a processor, coupled to the image sensing element and the at least one infrared illuminator and configured to; operate the at least one infrared illuminator and the image sensing element in a first mode whereby infrared light transmitted by the at least one infrared illuminator and reflected from the scene is used to generate a two-dimensional image of the scene; and operate the at least one infrared illuminator and the image sensing element in a second mode whereby infrared light transmitted by the at least one infrared illuminator and reflected from the scene is used to detect a first region, located within the scene, having a specific material, wherein in the second mode the processor is configured to; capture a first image of a scene while one or more of the illuminators are activated; capture a second image of the scene is captured while none of the illuminators are activated; construct a light intensity map for the scene by subtracting light intensity values from the second image from corresponding light intensity values in the first image; store to the memory the light intensity map; and transmit the stored light intensity map to a glass surface detection module configured to identify the first region as a glass surface when the light intensity values for the first region are below a threshold value corresponding to glass. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method, comprising:
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at a camera system having a memory configured to store information, a lens assembly arranged to direct light from a scene onto an image sensing element, an image sensing element configured to receive light from the scene via the lens assembly, at least one infrared illuminator configured to transmit infrared light, and a processor, coupled to the image sensing element and the at least one infrared illuminator; operating the at least one infrared illuminator and the image sensing element in a first mode whereby infrared light transmitted by the at least one infrared illuminator and reflected from the scene is used to generate a two-dimensional image of the scene; and operating the at least one infrared illuminator and the image sensing element in a second mode whereby infrared light transmitted by the at least one infrared illuminator and reflected from the scene is used to detect a first region, located within the scene, having a specific material, wherein operating the at least one infrared illuminator and the image sensing element in the second mode comprises; capturing a first image of a scene while one or more of the illuminators are activated; capturing a second image of the scene is captured while none of the illuminators are activated; constructing a light intensity map for the scene by subtracting light intensity values from the second image from corresponding light intensity values in the first image; storing to the memory the light intensity map; and transmit the stored light intensity map to a glass surface detection module configured to identify the first region as a glass surface when the light intensity values for the first region are below a threshold value corresponding to glass. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A non-transitory computer readable storage medium storing one or more programs configured for execution by a camera system having a memory configured to store information, a lens assembly arranged to direct light from a scene onto an image sensing element, an image sensing element configured to receive light from the scene via the lens assembly, at least one infrared illuminator configured to transmit infrared light, and a processor, coupled to the image sensing element and the at least one infrared illuminator, wherein the one or more programs comprise instructions for:
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operating the at least one infrared illuminator and the image sensing element in a first mode whereby infrared light transmitted by the at least one infrared illuminator and reflected from the scene is used to generate a two-dimensional image of the scene; and operating the at least one infrared illuminator and the image sensing element in a second mode whereby infrared light transmitted by the at least one infrared illuminator and reflected from the scene is used to detect a first region, located within the scene, having a specific material, wherein operating the at least one infrared illuminator and the image sensing element in the second mode comprises; capturing a first image of a scene while one or more of the illuminators are activated; capturing a second image of the scene is captured while none of the illuminators are activated; constructing a light intensity map for the scene by subtracting light intensity values from the second image from corresponding light intensity values in the first image; storing to the memory the light intensity map; and transmit the stored light intensity map to a glass surface detection module configured to identify the first region as a glass surface when the light intensity values for the first region are below a threshold value corresponding to glass. - View Dependent Claims (14, 15, 16, 17)
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Specification