System for reducing effects of undesired signals in an infrared imaging system
First Claim
1. An imaging system for reducing an effect of an undesired infrared light source using a desired infrared light source and an image capture device that detects emissions of both the undesired infrared light source and the desired infrared light source, comprising:
- a desired infrared light source that is positioned on a first side of a light permeable surface, the desired infrared light source selectively emitting desired infrared light that is transmitted through the light permeable surface onto a physical object positioned on or adjacent to an opposite side of the light permeable surface and is reflected back through the light permeable surface by the physical object, the desired infrared light source being controllable to be activated and deactivated at defined intervals to enable the detection and removal of undesired infrared light from all infrared light detected during the defined intervals;
an image capture device that is positioned on the same first side of the light permeable surface as the desired infrared light source, the image capture device sensing the desired infrared light after it is reflected by the physical object, and also sensing undesired infrared light that passes through the light permeable surface from undesired sources of infrared light located on the opposite side of the light permeable surface;
a screening device that is positioned on the same first side of the light permeable surface as the desired infrared light source and between the desired infrared light source and the image capture device to prevent the desired infrared light from entering the image capture device prior to being reflected back through the light permeable surface by the physical object; and
a processor in communication with the desired infrared light source and the image capture device.
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Accused Products
Abstract
Effects of undesired infrared light are reduced in an imaging system using an infrared light source. The desired infrared light source is activated and a first set of imaging data is captured during a first image capture interval. The desired infrared light source is then deactivated, and a second set of image data is captured during a second image capture interval. A composite set of image data is then generated by subtracting from first values in the first set of image data corresponding second values in the second set of image data. The composite set of image data thus includes a set of imaging where data all infrared signals are collected, including both signals resulting from the IR source and other IR signals, from which is subtracted imaging in which no signals result from the IR course, leaving image data including signals resulting only from the IR source.
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Citations
20 Claims
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1. An imaging system for reducing an effect of an undesired infrared light source using a desired infrared light source and an image capture device that detects emissions of both the undesired infrared light source and the desired infrared light source, comprising:
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a desired infrared light source that is positioned on a first side of a light permeable surface, the desired infrared light source selectively emitting desired infrared light that is transmitted through the light permeable surface onto a physical object positioned on or adjacent to an opposite side of the light permeable surface and is reflected back through the light permeable surface by the physical object, the desired infrared light source being controllable to be activated and deactivated at defined intervals to enable the detection and removal of undesired infrared light from all infrared light detected during the defined intervals; an image capture device that is positioned on the same first side of the light permeable surface as the desired infrared light source, the image capture device sensing the desired infrared light after it is reflected by the physical object, and also sensing undesired infrared light that passes through the light permeable surface from undesired sources of infrared light located on the opposite side of the light permeable surface; a screening device that is positioned on the same first side of the light permeable surface as the desired infrared light source and between the desired infrared light source and the image capture device to prevent the desired infrared light from entering the image capture device prior to being reflected back through the light permeable surface by the physical object; and a processor in communication with the desired infrared light source and the image capture device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification