Method for determining orientation of contour line segment in lo

Details Method for determining orientation of contour line segment in lo Method for determining orientation of contour line segment in lo

1996-07-08

1997-09-16

Johns, Andrew

Image analysis

Pattern recognition

Feature extraction

382203, 382205, G06K 946

Patent

active

056688938

ABSTRACT:
The present invention relates to a method for determining an orientation of a line segment in a contour in a local area of a binary contour image. The number of pixels having a predetermined value and located in each orientation in the local area, is obtained, and it is determined that a line segment exists in an orientation in which the number of pixels is large. Further, when it is determined that the number of pixels located in each of a plurality of orientations and having a predetermined value is greater than a sum of the numbers of pixels in orientations adjacent to said each orientation on both sides thereof, it is determined that a line segment exists in said each orientation. Two orientations in which large numbers of pixels are located are detected, and it is determined whether the point is a constituent of a line segment, a line segment of the sub-straight-line form, or a near-corner point, depending on angles made by the two orientations is equal to 180.degree., or a difference of the angles made by the two orientations from 180.degree.. Contiguously arrayed pixels in the same orientation are detected as a line segment. A position and an orientation are obtained from points near a corner, and representative values of the positions and orientations of contiguously arrayed near-corner points are determined.

REFERENCES:
patent: 5586199 (1996-12-01), Kanda et al.

Affiliated with

Also associated with

Rating

Method for determining orientation of contour line segment in lo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for determining orientation of contour line segment in lo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for determining orientation of contour line segment in lo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-224251