engleski

Robust Extraction of Line Segments from Colour Images by an Iterative Weighted Polarised Hough Transform

Abstract - In this paper, a nonparametric iterative procedure for robust extraction of line segments from a colour image is introduced. On input, weighted edge map and gradient direction map are provided by applying a nonparametric modification of Canny edge detector to original colour image. Then, a sequence of following three algorithms is iteratively applied: weighted polarised Hough transform, algorithm for detecting prominent local maxima in parameter space and algorithm for extracting line segments given the list of prominent lines. An iterative approach is applied in order to overcome the "screening effect" which is identified as a cause for many problems tied with standard Hough transform. Results on three sets of colour images are reported in order to show performance and robustness of the proposed procedure.

image segmentation; edge detection; Hough transform; extraction of line segments

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