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Is Opencv is capable of drawing an approximation curve for given data points which might have noise? Do I need to implement that approximation function separately?

Shyam
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    do you want to DRAW the (known) curve or du you want to COMPUTE the curve? To draw a known parametric curve, see http://stackoverflow.com/questions/24526617/trying-to-plot-simple-function-using-opencv-c/24527147#24527147 and http://stackoverflow.com/questions/16590329/access-to-pixels-along-the-curve-path-using-opencv/20710629#20710629 . To approximate points by a curve, see `cv::fitLine`, `approxPolyDP` etc. but probably there are better libraries to fit curves, because openCV is about computer vision. – Micka Dec 23 '15 at 08:30
  • What is the approximate noise ratio ? – Humam Helfawi Dec 23 '15 at 08:50

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No. You need to implement the approximation function separately. Take the data points and fit a polynomial curve using standard least squares/ total least squares approximation. You can also use RANSAC algorithm, if you have a high number of outliers in the data.

Paras Savnani
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