The invention provides a two-phase method for identifying sets of collinear points in data points, e.g., derived from an image. During a first phase, the "angle-finding" phase, the angular orientation of the lines defined by the sets of points is estimated. During a second phase, the "line-finding" phase,...http://www.google.de/patents/US6075881?utm_source=gb-gplus-sharePatent US6075881 - Machine vision methods for identifying collinear sets of points from an image
Machine vision methods for identifying collinear sets of points from an image