Apparatus and method for detecting horizon in sea image
First Claim
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1. An apparatus, comprising:
- a region-of-interest (ROI) detection unit that detects coordinates of an ROI selected in a still image corresponding to a frame of a moving sea image; and
a control unit thatdetects a horizon corresponding to a line-fitting in the ROI of the still image determined by the detected coordinates,calculates parameters a and b as Eigenvalues of the following matrix A,
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Abstract
Provided is an apparatus and method for detecting a horizon which is necessary to detect a camera movement when compositing sea images in a marker-free sea-image camera tracking system. In the method, an ROI is selected near a horizon in a still image of the moving image of the sea, and each maximum point corresponding to the maximum brightness difference is detected from brightness differences between two pixels of each pair having two symmetrical pixels in each column of the ROI. The horizon is detected through a line-fitting using the maximum points. Therefore, the result of horizon detection can be very stable and a horizon can be easily detected in a sea scene having hundreds of frames.
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16 Claims
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1. An apparatus, comprising:
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a region-of-interest (ROI) detection unit that detects coordinates of an ROI selected in a still image corresponding to a frame of a moving sea image; and a control unit that detects a horizon corresponding to a line-fitting in the ROI of the still image determined by the detected coordinates, calculates parameters a and b as Eigenvalues of the following matrix A, - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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designating an ROI (region-of-interest) in a still image corresponding to a frame of a moving sea image; detecting a horizon corresponding to a line-fitting in the ROI of the still image; calculating parameters a and b as Eigenvalues of the following matrix A, - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification