Accuracy – Depends on how accurately edge locations are estimated.Efficiency – Least compact & simplest.Ordered List:- The simplest representation of contour.Performance of the curve fitting algorithm. Accuracy of estimating of edge locations.Effectiveness – Suitable for the operation performed in the later stages of the application.Accuracy – Fit images features accurately.Efficiency – Simple, compact representation.All other adjacent pixels are considered to be apart by 2 pixels. Two adjacent pixels that lie horizontally or vertically are considered to be apart by 1 pixel.The length of a contour is computed from the sum of distances between adjacent pixels in the contour.All pixels in a closed contour have exactly two neighbor Computer Vision An open contour has two end pixels each with only one neighbor, and zero or more interior pixels, each with exactly two neighbors.
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