MODEL BASEDMULTI-VIEW ACTIVE CONTOURS FOR QUALITY INSPECTION

Abstract

In this paper, 3D parametric active contours are used to segment contoursof flexibleobjects. The contour is a 3D curve or a "weak" model supplying informationabout the object contour. Views from two or more viewpoints are incorporatedand enable direct reconstruction in three-dimensional space, withoututilisingvolumetric images or separate active contours on each image. Thiscurve is optimisedusing a greedy algorithm, leading to a fast algorithm, suitable forusein on-line quality inspection applications. 3D ziplock ribbon snakesare used tomodel tubes and other approximately rotationally symmetric objects.Model informationis incorporated by hard constraints and model-specific energy terms.The proposed 3D contour segmentation algorithm is applied one syntheticandtwo real-world scenes. The average distance between the reconstructedcontourand the ground truth amounts to 1 mm, which is equivalent to approximately1disparity pixel for all three examples.