Ambient Light Rejection In Digital Video Images
First Claim
1. A method for generating an ambient light rejected output image comprising:
- providing a sensor array including a two-dimensional array of digital pixels, the digital pixels outputting digital signals as digital pixel data representing the image of the scene;
capturing a pair of images of a scene within the time period of a video frame using the sensor array, the pair of images including a first image being illuminated by ambient light and a second image being illuminated by the ambient light and a light source;
storing the digital pixel data associated with the first and second images in a data memory; and
subtracting the first image from the second image to obtain the ambient light rejected output image.
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Accused Products
Abstract
A method for generating an ambient light rejected output image includes providing a sensor array including a two-dimensional array of digital pixels where the digital pixels output digital signals as digital pixel data representing the image of the scene, capturing a pair of images of a scene within the time period of a video frame using the sensor array where the pair of images includes a first image being illuminated by ambient light and a second image being illuminated by the ambient light and a light source, storing the digital pixel data associated with the first and second images in a data memory, and subtracting the first image from the second image to obtain the ambient light rejected output image.
131 Citations
17 Claims
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1. A method for generating an ambient light rejected output image comprising:
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providing a sensor array including a two-dimensional array of digital pixels, the digital pixels outputting digital signals as digital pixel data representing the image of the scene; capturing a pair of images of a scene within the time period of a video frame using the sensor array, the pair of images including a first image being illuminated by ambient light and a second image being illuminated by the ambient light and a light source; storing the digital pixel data associated with the first and second images in a data memory; and subtracting the first image from the second image to obtain the ambient light rejected output image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A digital imaging system, comprising:
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a sensor array including a two-dimensional array of digital pixels, the digital pixels outputting digital signals as digital pixel data representing the image of the scene; a data memory, in communication with said sensor array, for storing the digital pixel data; a first processor, in communication with the sensor array and the data memory, for controlling the sensor array and a light source, wherein the first processor operates the sensor array to capture a first image of a scene being illuminated by ambient light and operates the sensor array and the light source to capture a second image of the scene being illuminated by the ambient light and the light source, the first image and the second image being captured within a video frame, and wherein the first image is subtracted from the second image to generate an ambient light rejected output image. - View Dependent Claims (16, 17)
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Specification