Apparatus for detecting direction of image pickup device and moving body comprising same
First Claim
1. An image capture device direction detector for detecting the direction of the optical axis of an image capture device, the device including an image capturing section for capturing polarization images, including a polarization angle image, and a luminance image, the detector comprising:
- an image processing section for generating a clear sky polarization angle image, which indicates the polarization angle of a clear sky part of the luminance image, based on the polarization images and the luminance image;
an direction estimating section for estimating the direction of the optical axis of the image capture device, which is determined by the direction of the image capturing section, by reference to the clear sky polarization angle image; and
an output section for providing information about the direction of the optical axis of the image capture device that has been estimated by the direction estimating section.
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Accused Products
Abstract
A polarization camera that can capture polarization images and a color image at the same time is used. Specifically, a clear sky polarization image, which provides information about the polarization of a part of the sky, is captured by a clear sky polarization image capturing section 100. And by reference to the information provided by a sun position determining section 1301 that determines the sun'"'"'s position at the time of shooting, a camera direction estimating section 101 determines in what direction and in what area of the whole sky the clear sky polarization image is located as a polarization pattern. Finally, information about what direction or orientation on the globe the camera (image capture device) is now facing is output. In this manner, the direction of the camera and the relative position of the camera with respect to the sun can be known without providing a sensor separately and without capturing the whole sky or the sun.
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Citations
25 Claims
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1. An image capture device direction detector for detecting the direction of the optical axis of an image capture device, the device including an image capturing section for capturing polarization images, including a polarization angle image, and a luminance image, the detector comprising:
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an image processing section for generating a clear sky polarization angle image, which indicates the polarization angle of a clear sky part of the luminance image, based on the polarization images and the luminance image; an direction estimating section for estimating the direction of the optical axis of the image capture device, which is determined by the direction of the image capturing section, by reference to the clear sky polarization angle image; and an output section for providing information about the direction of the optical axis of the image capture device that has been estimated by the direction estimating section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An image capture device comprising:
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an image capturing section for capturing polarization images, including a polarization angle image, and a luminance image; an image processing section for generating a clear sky polarization angle image, which indicates the polarization angle of a clear sky part included in the luminance image, based on the polarization images and the luminance image; a direction estimating section for estimating the direction of the optical axis of the image capture device, which is determined by the direction of the image capturing section, by reference to the clear sky polarization angle image; and an output section to output the image data that has been obtained by the image capturing section and providing information about the direction of the optical axis of the image capture device that has been estimated by the direction estimating section.
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24. A method for detecting the direction of the optical axis of an image capture device, the method comprising the steps of:
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capturing polarization images and a luminance image with the image capture device; generating a clear sky polarization angle image, which indicates the polarization angle of a clear sky part of the luminance image, based on the polarization images and the luminance image; estimating the direction of the image capture device by reference to the clear sky polarization angle image; and to output the information about the direction of the optical axis of the image capture device.
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25. A non-transitory computer-readable medium having stored thereon a program defined for an image capture device direction detector that detects the direction of the optical axis of an image capture device during at the time of shooting by using a celestial polarization pattern, the program being defined so as when executed by a computer causes the computer to execute the steps of:
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capturing polarization images and a luminance image with the image capture device; generating a clear sky polarization angle image, which indicates the polarization angle of a clear sky part of the luminance image, based on the polarization images and the luminance image; estimating the direction of the optical axis of the image capture device by reference to the clear sky polarization angle image; and to output the information about the direction of the optical axis of the image capture device.
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Specification