public Image2DMatrix GetImageMatrix()
{
Image2DMatrix sourceMatrix = _imageLoader.GetImageMatrix();
if (Quadrilateral != null)
{
//Bilinear transformations have 8 Parameter. These parameter can be obtained
//by solving two linear equation systems. This will be done in the following.
Quadrilateral targetQuadrilateral = GetTargetQuadrilateral();
Matrix <double> m = GetmMatrix();
Vector <double> a = GetaVector(targetQuadrilateral, m);
Vector <double> b = GetbVector(targetQuadrilateral, m);
double a0 = a[0];
double a1 = a[1];
double a2 = a[2];
double a3 = a[3];
double b0 = b[0];
double b1 = b[1];
double b2 = b[2];
double b3 = b[3];
return(Image2DMatrix.Transform(sourceMatrix, (x, y) =>
{
x = (int)(a0 * x + a1 * y + a2 * x * y + a3);
y = (int)(b0 * x + b1 * y + b2 * x * y + b3);
return (x, y);
}));
}
return(sourceMatrix);
}
private Image2DMatrix ApplyTransformationMatrix(Image2DMatrix imageMatrix, TransformationMatrix transformationMatrix)
{
if (transformationMatrix != TransformationMatrix.UnitMatrix3x3)
{
if (SourceToTargetEnabled)
{
imageMatrix = Image2DMatrix.Transform(imageMatrix, transformationMatrix);
}
else
{
//With target to source enabled, the inverted transformation matrix is needed.
Image2DMatrix targetMatrix = new Image2DMatrix(TargetImageHeight, TargetImageWidth, imageMatrix.BytePerPixel);
imageMatrix = Image2DMatrix.TransformTargetToSource(imageMatrix, targetMatrix, transformationMatrix.Invert2D());
}
}
return(imageMatrix);
}
