Image line-segment extracting apparatus

Details Image line-segment extracting apparatus Image line-segment extracting apparatus

1994-04-18

1997-05-13

Boudreau, Leo

Image analysis

Image transformation or preprocessing

Walsh, hough, or hadamard transform

382168, G06K 900

Patent

active

056299893

ABSTRACT:
An image line-segment extracting apparatus which in processing steps to conduct Hough transformation of a sequence of edge pixels composing an image, to plot a histogram based on Hough function values, to successively detect peaks from the histogram and to extract a plurality of line segments existing in the image, can detect the only true peaks, effectively eliminating false peaks. The process also includes a feature by which region is defined and the amount of influence of a remarkable one of the peaks in a histogram upon frequency distribution on the histogram are determined and then histogram frequency values of other peaks in the defined region are corrected according to the determined amount of influence to partially rewrite the histogram.

REFERENCES:
patent: 3069654 (1962-12-01), Hough
patent: 4707647 (1987-11-01), Coldren et al.
patent: 4731860 (1988-03-01), Wahl
patent: 5055682 (1991-10-01), Takeo
patent: 5081580 (1992-01-01), Takeo

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