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This paper presents a method for the square detection based on distance distribution of the edge points of the image. The orientation line of the edge point is defined first, then for each pixel of the image, the distances between the pixel and the orientation lines of the edge points in the defined neighborhood of the pixel are computed to obtain the feature length and feature energy of the pixel,...
The medical image has become a diagnostic technique largely applied for the determination of doctor's diagnosis. But it is difficult for detecting the medical image borders accurately. This paper proposes a new medical image edge-detection technique based on PSO Algorithm. A new fitness function is formulated as the objective function. PSO algorithm is adopted to find the optimal filter mask to enhance...
The location of a circular target plays an important role in the computer vision. The two invariants in the perspective projection model of camera imaging process is analyzed and a five-point constraints and the optimization object function based on cross-ratio and the straightness of the fitting line is put forward, and then a method of suppressing stochastic errors in the location of circle centers...
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