Automatic positioning method of insulator strings based on collinear and equidistant constraints of image feature points
A technology of image feature points and insulator strings, which is applied in the field of state maintenance of power transmission and transformation equipment, can solve the problems of not considering the shape characteristics of insulator strings in binary images, high computational complexity, low precision, etc., so as to improve automation performance, High positioning accuracy, solving the effect of low accuracy
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[0060] Such as figure 1 As shown, a method for automatic positioning of aerial insulator strings based on collinear and equidistant constraints of image feature points includes the following steps:
[0061] Step a: Image preprocessing: preprocessing the image containing the aerial insulator string to obtain a binary image with smooth edges after filtering noise;
[0062] Step b: Curvature scale space corner point extraction: extract the edge image of the binary image, extract the contour curve from the edge image; calculate the curvature of each pixel point on the contour curve under the scale σ=3, and convert the local The point with the maximum curvature is used as a candidate corner point; if the curvature value of the candidate corner point is greater than the preset curvature threshold and greater than twice the local minimum value of its neighborhood, it is the correct corner point; in the original image, accurate positioning is related to the The curvature scale space ...
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