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JavaCV drawing problem 9 Years Ago by silvercats How to draw a convexthull and a polygon around the hand in this tutorial. I found this tutorial in JavaCV how to detect a hand gesture. But it doesn't show how to draw the convexhull or a polygon around the palm. Can someone tell me how to do that in this example? http://www.javacodegeeks.com/2012/12/hand-and-finger-detection-using-javacv.html Re: JavaCV drawing problem 9 Years Ago by silvercats > QThat example has all the code and extensive explanations. What exactly do you need that's not in the code or the explanations? It doesn't show how to Draw a Convexhull. It shows how to calculae it but there is no demonstration on how to draw it on the image. Re: JavaCV drawing problem 9 Years Ago by silvercats there is no method in Graphics2d to draw a Convexhull. It is a JavaCV thing Point in Polyhedron 9 Years Ago by fatalaccidents … a convex hull from the points with the scipy.spatial.ConvexHull module. What I'm trying to do is then find… Re: Convex Hull problem 15 Years Ago by Flixter … the same as the first one. vector<Point> ConvexHull(vector<Point> P) { int n = P.size(), k…)); allPoints.push_back(Point(41, 29)); vector<Point> convexHullPoints = ConvexHull(allPoints); PrintPoints(convexHullPoints); cout << "The area of… Re: JavaCV drawing problem 9 Years Ago by Hiroshe Just draw it on the `Graphics2D` in `draw()`? Re: JavaCV drawing problem 9 Years Ago by JamesCherrill That example has all the code and extensive explanations. What exactly do you need that's not in the code or the explanations? Re: JavaCV drawing problem 9 Years Ago by silvercats > Just draw it on the Graphics2D in draw()? That is what I want to know how Re: JavaCV drawing problem 9 Years Ago by silvercats I want to get the output like on this image. http://www.codeproject.com/Articles/498193/Mouse-Control-via-Webcam Re: JavaCV drawing problem 9 Years Ago by Hiroshe If you don't knwo how to draw on a Graphics2D, then read the [documentation](http://docs.oracle.com/javase/7/docs/api/java/awt/Graphics2D.html). Re: JavaCV drawing problem 9 Years Ago by Hiroshe Correct. AFAIK, You'll need to get the geometry of it and draw it onto the Graphics2D. Re: Point in Polyhedron 9 Years Ago by Gribouillis It seems to me that this question is solvable by linear programming. The function `scipy.optimize.linprog()` should work with convenient parameters. Re: Point in Polyhedron 9 Years Ago by Gribouillis Here is the basic idea #!/usr/bin/env python # -*-coding: utf8-*- '''doc ''' from __future__ import (absolute_import, division, print_function, unicode_literals) import numpy as np from scipy.optimize import linprog def main(): point = np.array([0… Re: Point in Polyhedron 9 Years Ago by Gribouillis `linprog()` needs scipy version >= 0.15.0. In ubuntu, I had to remove package scipy and reinstall scipy with the pip command (as of march 2015). Re: Point in Polyhedron 9 Years Ago by snippsat >because my anaconda distribution doesn't seem to have linprog (?) You can use `pip install` or `conda install`(Scripts folder) to get new stuff into Anaconda. For this is best to use `conda install scikit-learn`,then you get all new packages that scikit-learn need. Look like this when run `conda install scikit-learn`. The following …