Virtual sport system for acquiring good image of ball by controlling camera according to surrounding brightness
First Claim
1. A virtual sport system, comprising:
- a photographing unit comprising a camera to acquire images of a ball; and
a simulator to calculate physical quantities of the ball on the basis of the images of the ball,wherein the photographing unit further comprises a control unit to extract visual information from at least one image acquired by the camera and determine a control signal for adjusting an exposure time or video gain of the camera on the basis of the visual information,wherein the control unit extracts visual information from at least one other image acquired by the camera with the adjusted exposure time or video gain, and further adjusts the exposure time or video gain of the camera if the visual information fails to meet a predefined criteria, andwherein the camera further acquires at least one image of a reference subject comprising at least two regions each having a uniform reflectance, the reflectances of the at least two regions being different from each other, and the control unit determines the control signal on the basis of visual information extracted from the at least one image of the reference subject with two or more regions, each region having a reflectance different from each other, such that at least some of the at least two regions in the reference subject are distinguished from a ground surface.
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Accused Products
Abstract
The present invention relates to a virtual sport system for acquiring a good image of a ball by controlling a camera according to the surrounding brightness. One embodiment of the present invention provides a virtual sport system which comprises a photographing unit, having a camera for acquiring an image of a ball, and a simulator, for calculating the physical quantity of the ball on the basis of the image of the ball; and which further comprises a control unit that extracts image information from at least one image acquired by the photographing unit by means of the camera, and determining, on the basis of the image information, a control signal for adjusting the image gain or the exposure time of the camera.
8 Citations
8 Claims
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1. A virtual sport system, comprising:
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a photographing unit comprising a camera to acquire images of a ball; and a simulator to calculate physical quantities of the ball on the basis of the images of the ball, wherein the photographing unit further comprises a control unit to extract visual information from at least one image acquired by the camera and determine a control signal for adjusting an exposure time or video gain of the camera on the basis of the visual information, wherein the control unit extracts visual information from at least one other image acquired by the camera with the adjusted exposure time or video gain, and further adjusts the exposure time or video gain of the camera if the visual information fails to meet a predefined criteria, and wherein the camera further acquires at least one image of a reference subject comprising at least two regions each having a uniform reflectance, the reflectances of the at least two regions being different from each other, and the control unit determines the control signal on the basis of visual information extracted from the at least one image of the reference subject with two or more regions, each region having a reflectance different from each other, such that at least some of the at least two regions in the reference subject are distinguished from a ground surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification