Approximates a polygonal curve(s) with the specified precision

approxCurve = cv.approxPolyDP(curve)
approxCurve = cv.approxPolyDP(curve, 'OptionName', optionValue, ...)

Input

• curve Input vector of 2D points stored in numeric array (Nx2/Nx1x2/1xNx2) or cell array of 2-element vectors ({[x,y], ...}). Supports integer (int32) and floating point (single) classes.

Output

• approxCurve Result of the approximation. The type should match the type of the input curve.

Options

• Epsilon Parameter specifying the approximation accuracy. This is the maximum distance between the original curve and its approximation. default 2.0
• Closed If true, the approximated curve is closed (its first and last vertices are connected). Otherwise, it is not closed. default true

The functions cv.approxPolyDP approximate 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. It uses the Douglas-Peucker algorithm http://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm.