Method and camera (apparatus) for optically capturing a screen
First Claim
1. A camera for optically capturing a screen, wherein the screen has an area, and wherein a predetermined overall resolution is intended for the optical capture, comprising:
- a camera support with an array of camera mounts, which are effective to build an optical arrangement comprising;
an array of optical individual cameras, wherein every optical individual camera is fixed on an associated camera mount, wherein an optical individual camera has a light sensor and an optical imaging device, wherein the light sensor and the optical imaging device are effective to capture a partial area of the screen area with an individual resolution, which is higher than the predetermined overall resolution, wherein the light sensor and the optical imaging device are arranged such that the partial areas of the optical individual cameras partially overlap each other; and
an image processing device for processing digital individual images of the array of optical individual cameras to generate the optical capture of the screen that has an area, with the predetermined overall resolution,wherein the image processing device is effective to subject the digital individual images to a correction to reduce alignment inaccuracies and parameter variations including scaling variations in the array of optical individual cameras, wherein a correction rule determined for an individual image during calibration is used for the correction, and wherein the correction results in corrected digital individual images having a correction resolution which is higher than the predetermined overall resolution and lower than or equal to the individual resolution used used when capturing the partial areas of the screen area;
wherein the image processing device is effective to assemble, with overlapping areas of the corrected individual images eliminated, the corrected individual images to obtain a corrected overall image having the correction resolution, andwherein the image processing device is effective to combine adjacent pixels of the corrected overall image to reduce the resolution thereof down to the predetermined overall resolution.
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Accused Products
Abstract
A camera for optically capturing a screen, wherein the screen has an area and wherein a predetermined overall resolution is provided for the optical capture, comprises a camera support with an array of camera mounts, an array of optical individual cameras as well as an image processing device for processing digital individual images of the array of optical individual cameras to generate the optical capture of the screen with the predetermined overall resolution. The image processing device is effective to reduce a correction of the individual images with regard to alignment inaccuracies and/or parameter variations, wherein for correction purposes a correction resolution is used, which is higher than the overall resolution, and wherein for every individual camera an individual correction rule is used for the correction. After the correction has been performed, the corrected overall image is brought to the predetermined overall resolution by combining adjacent pixels. Thereby, with inexpensive individual cameras, an image of a large-format screen is obtained efficiently, inexpensively and with little artifacts.
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Citations
22 Claims
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1. A camera for optically capturing a screen, wherein the screen has an area, and wherein a predetermined overall resolution is intended for the optical capture, comprising:
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a camera support with an array of camera mounts, which are effective to build an optical arrangement comprising; an array of optical individual cameras, wherein every optical individual camera is fixed on an associated camera mount, wherein an optical individual camera has a light sensor and an optical imaging device, wherein the light sensor and the optical imaging device are effective to capture a partial area of the screen area with an individual resolution, which is higher than the predetermined overall resolution, wherein the light sensor and the optical imaging device are arranged such that the partial areas of the optical individual cameras partially overlap each other; and an image processing device for processing digital individual images of the array of optical individual cameras to generate the optical capture of the screen that has an area, with the predetermined overall resolution, wherein the image processing device is effective to subject the digital individual images to a correction to reduce alignment inaccuracies and parameter variations including scaling variations in the array of optical individual cameras, wherein a correction rule determined for an individual image during calibration is used for the correction, and wherein the correction results in corrected digital individual images having a correction resolution which is higher than the predetermined overall resolution and lower than or equal to the individual resolution used used when capturing the partial areas of the screen area; wherein the image processing device is effective to assemble, with overlapping areas of the corrected individual images eliminated, the corrected individual images to obtain a corrected overall image having the correction resolution, and wherein the image processing device is effective to combine adjacent pixels of the corrected overall image to reduce the resolution thereof down to the predetermined overall resolution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for optically capturing a screen, wherein the screen has an area, and wherein a predetermined overall resolution is provided for the optical capture, comprising the steps of:
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capturing the screen via an array of optical individual cameras, wherein every individual camera is fixed on a camera mount of a camera support, wherein an optical individual camera comprises a light sensor and an optical imaging device, wherein the light sensor and the optical imaging device are effective to capture a partial area of the screen area with an individual resolution, which is higher than the predetermined overall resolution, wherein the light sensor and the optical imaging device are arranged such that the partial areas of the optical individual cameras partially overlap each other; and processing digital individual images of the array of optical individual cameras to generate the optical capture of the screen with the predetermined overall resolution, wherein the step of processing comprises the following substeps; correcting the digital individual images to reduce alignment inaccuracies and parameter variations including scaling variations in the array of optical individual cameras, wherein in the step of correcting a correction rule determined for an individual image during calibration is used, and wherein the correction results in corrected individual images having a correction resolution, which is higher than the predetermined overall resolution and lower than or equal to the individual resolution dual images; assembling, with overlapping areas of the corrected individual images eliminated, the corrected individual images to obtain a corrected overall image having the correction resolution; and combining adjacent pixels of the corrected overall image to reduce the resolution thereof down to the predetermined overall resolution.
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Specification