Tagged Questions

Triangulation is either using angular measurements along a baseline to find the location of points, or splitting a polygon into triangles so that it can be rendered by a graphics library.

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Timing and Position Triangulation Using Sensors

Say I have 3 vibration sensors around in a room. How would I determine the location of someone in the room using these vibration sensors. If I used an fpga I'm sure it could sample fast enough to ...
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Triangulate a polygon in objective c

I need to triangulate a polygon that could be convex or concave, but it doesn't have holes in it, is there a code or a library for objective-c that does the job?
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How to correct winding of triangles to counter-clockwise direction of a 3D Mesh model?

First of all let me clear .. I am not asking about 2D mesh, to determine the winding order of 2D mesh its very easy with normal-z direction. Second is, I am not asking any optimized algorithm, I do ...
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Three Dimensional Positioning given the distances from well known fixed stations [migrated]

I have a mathematical (Algorithm) problem I need to compute the position of a static object based on the distance to multiple fixed stations (it the same thing we do to calculate the GPS receiver ...
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3answers
77 views

How to get the points on the face to draw Delaunay triangulation

How can I have mouth and eyes corner points and nose central point using OpenCv like in this picture? Can anyone help me?
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0answers
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Apply Delaunay triangulation in OpenCV on Faces Via Webcam

I'm trying to implement one of active appearance models (AMM), delaunay triangulation with openCv on faces via webcam basing on this : example code and i saw this Question about that and its work for ...
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How to do triangulation with kinect?

i'm doing 3d reconstruction using kinect and now i have troubles to join differents snapshot from differents angles.I'm working in c# with openni , someone know how to do it ?
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1answer
45 views

Find location of an object using 2D trilateration

I am trying to use trilateration in a program to simulate how it would be in real life. I have 3 transmitters which send out a signal that gets weaker after each square that the signal moves. I am ...
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shortest length path in undirected chordal graph in log space

Given an undirected chordal graph, is it possible to find the minimum distance between a source and any other vertices in LogSpace or in LogDCFL? At least with the constraint that between any two ...
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Tetgen tetcall compiling error

I want to use Tetgen to calculate the volume of a given set of points by tetrahedralization. I already saw a snippet in the code doing this, and might only requires some tweaking. The problem I have ...
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1answer
32 views

Locational triangulation

I have data about 10 point in a 2D map, I know the location of points 1,2 and 3. I also know the distance between point 1,2 and 3 to all other points. I know that cell phone uses distance from gsm ...
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Image-based reconstruction using triangulation

I'm currently trying to implement the triangulation algorithm proposed by Hartley and Sturm (here) and I'm having some difficulties. I think I understand the idea behind it, but I'm not sure how to ...
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2answers
165 views

Wifi position triangulation

I need to understand how Wifi triangulation basically works. The scene is as portrayed in above diagram. Inorder to implement wifi triangulation, I need a minimum of 3 Wifi hotspots and their ...
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1answer
188 views

How to correctly use cv::triangulatePoints()

I am trying to triangulate some points with opencv and I found this cv::triangulatePoints() function. The problem is that there is almost no documentation or examples of it (on the whole internet! how ...
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2answers
179 views

Delaunay triangulation makes me lose symmetry

I am using Delaunay triangulation to split polygons into triangles. I work on FEM with a large code, and one of my "checkpoints" is symmetry (if the data is symmetric, the output has to be symmetric ...

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