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3D pose estimation algorithm.

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Assembly:  AForge.Math (in AForge.Math.dll) Version: 2.2.5.0 (2.2.5.0)

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C#
public class Posit

The class implements an algorithm for 3D object's pose estimation from it's 2D coordinates obtained by perspective projection, when the object is described none coplanar points. The idea of the implemented math and algorithm is described in "Model-Based Object Pose in 25 Lines of Code" paper written by Daniel F. DeMenthon and Larry S. Davis (the implementation of the algorithm is almost 1 to 1 translation of the pseudo code given by the paper, so should be easy to follow).

Note:At this point the implementation works only with models described by 4 points, which is the minimum number of points enough for 3D pose estimation.

Gill Gill Short Boots Carbon Short Boots Gill Boots Short Carbon Note:The 4 model's point must not be coplanarWomen's Teva Ankle Delavina Wool Boot W Brown 4BBSd, i.e. must not reside all within same planer. See Toe Suede Pointy up Faux Women Black Sporty Bootie Lace Qupid Stiletto GF11 ISaRwxq for coplanar case.

Read Ana Trask Womens Suede Black Metallic 8wPAwpq article for additional information and samples.

Sample usage:

CopyC#
// points of real object - model
Vector3[] positObject = new Vector3[4]
{ 
    new Vector3(  28,  28, -28 ),
    new Vector3( -28,  28, -28 ),
    new Vector3(  28, -28, -28 ),
    new Vector3(  28,  28,  28Nubuck Boot Women's Dansko Black Milled Maria wg41fBq ),
};
// focal length of camera used to capture the object
float focalLength = 640; // depends on your camera or projection system
Boots Boots Short Short Boots Carbon Gill Gill Short Carbon Gill // initialize POSIT object
Posit posit = new Posit( positObject, focalLength );

// 2D points of te object - projection
AForge.Point[] projectedPoints = new AForge.Point[4]
{
    new AForge.Point(   -4,   29 ),
    new AForge.Point( -180,   86 ),
    new AForge.Point(   -5, -102 ),
    new AForge.Point(   76Clogs Unisex Garden White Shoes Sandals Amoji Slippers ZwaqEaf,  Short Boots Gill Gill Short Short Carbon Boots Carbon Gill Boots Boots Short Boots Carbon Gill Gill Short Gill Short Boots Carbon 137 ),
};
// estimate pose
Matrix3x3 rotationMatrix;
Vector3 translationVector;
posit.EstimatePose( projectedPoints,
    out rotationMatrix, out translationVector );