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Intersection point detecting device, camera calibration system, intersection detection method, camera calibration method, program and recording medium
Intersection point detecting device, camera calibration system, intersection detection method, camera calibration method, program and recording medium
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机译:交叉点检测装置,相机校准系统,交叉点检测方法,摄像机校准方法,程序和记录介质
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摘要
PROBLEM TO BE SOLVED: To provide an intersection detection device capable of improving detection accuracy of an intersection of a checker pattern.SOLUTION: An intersection detection device 101 includes a memory 103, and an intersection detection section 106 which reads out an image of at least a part of photographic images as a rectangular image from the memory 103, and detects an intersection of two boarder lines in a checker pattern displayed on the rectangular image. The intersection detection section 106 determines a plurality of parameters of a function model for optimizing an evaluation value based on a difference between each pixel value expressed by a functional model with a two-dimensional image coordinate as a variable and each pixel value of the rectangular image, and calculates a position of an intersection between two straight lines expressed by the plurality of determined parameters to detect the intersection with sub-pixel accuracy. The functional model represents a pixel value at each position on the two-dimensional coordinate system in a boundary between a black region and a white region with a curve that is differentiable at least once.SELECTED DRAWING: Figure 1
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