 # cv approxpolydp

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OpenCV: Structural Analysis and Shape Descriptors cv.approxPolyDP(curve, epsilon, closed[, approxCurve]) #include Approximates a polygonal curve(s) with the specified precision. The function cv::approxPolyDP approximates a curve or a polygon with another curve polygon with less vertices so that the distance between them is less or equal to the specified precision. Python Examples of cv2.approxPolyDP Python cv2.approxPolyDP () Examples The following are 30 code examples for showing how to use cv2.approxPolyDP (). These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. python OpenCV visualize polygonal curve(s) extracted ... cv2.approxPolyDP() returns list of points, and yes, you are able to draw them as a curve, but I am not sure how it deals with self intersections (which exist on your initial curve). – avtomaton Jan 26 '17 at 17:32. OpenCV: Contour Features Convex Hull will look similar to contour approximation, but it is not (Both may provide same results in some cases). Here, cv.convexHull () function checks a curve for convexity defects and corrects it. Generally speaking, convex curves are the curves which are always bulged out, or at least flat. OpenCV: Contour Features approx = cv.approxPolyDP(cnt,epsilon, True) Below, in second image, green line shows the approximated curve for epsilon = 10% of arc length. Third image shows the same for epsilon = 1% of the arc length. OpenCV: Creating Bounding boxes and circles for contours Use cv::Canny to detect edges in the images. Finds contours and saves them to the vectors contour and hierarchy., ); For every found contour we now apply approximation to polygons with accuracy 3 and stating that the curve must be closed. After that we find a bounding rect for every polygon and ... Image ApproxPolyDP Example OpenCV Image ApproxPolyDP Example elements named canvasInput and canvasOutput have been prepared. Click Try it button to see the result. You can choose another image. You can change the code in the