int momentThresholdingAtPoint(intVectorType point ,densityDataType *sourceData, densityDataType *targetData, float structuresignal, float absMin, float deltaEpsilon, float absMax,int scanningRange)
{
float datum=ACCESSDATAATPOINT((*sourceData), point.x, point.y);
if(datum<absMin)
{
ACCESSDATAATPOINT((*targetData), point.x, point.y)=0.0;
return 0;
}
if(datum>absMax)
{
ACCESSDATAATPOINT((*targetData), point.x, point.y)=1.0;
return 0;
}
float alpha, structure;
momentOfInertiaType Inertia;
evaluateDirectionAndStructure(&alpha, &structure, &Inertia, *sourceData, point, 4);
float massAroundPoint=calculateMassArroundPoint(*sourceData, point, scanningRange);
float volume=(scanningRange-1)*(scanningRange-1);
float meanSignal=massAroundPoint/volume;
if (structure>structuresignal && (datum)>(meanSignal+deltaEpsilon))
{
ACCESSDATAATPOINT((*targetData), point.x, point.y)=structure;
return 0;
}
ACCESSDATAATPOINT((*targetData), point.x, point.y)=0.0;
return 0;
}
int calcDiffusionTensorAtPoint(floatMatrixType *Tensor, int x, int y, densityDataType *densityData, int scanningRange)
{
/*
//Diagonal
//Debug
(*Tensor).a11=0.0; (*Tensor).a12=1.0;
(*Tensor).a21=1.0; (*Tensor).a22=0.0;
return 0;
*/
intVectorType point;
point.x=x;
point.y=y;
momentOfInertiaType Inertia;
floatMatrixType BT, B, Diag, Help;//, Diffusion;
float a, structure;
evaluateDirectionAndStructure(&a, &structure ,&Inertia, *densityData, point, scanningRange);
//BTransposed
float magV1=FLOATVECNORM((Inertia).v1)+EPS;
float magV2=FLOATVECNORM((Inertia).v2)+EPS;
BT.a11=(Inertia).v1.x/magV1; BT.a12=(Inertia).v1.y/magV1;
BT.a21=(Inertia).v2.x/magV2; BT.a22=(Inertia).v2.y/magV2;
//Diagonal
Diag.a11=1.0; Diag.a12=0.0;
Diag.a21=0.0; Diag.a22=EPS;
//B
B.a11=BT.a11; B.a12=BT.a21;
B.a21=BT.a12; B.a22=BT.a22;
//Create Diffusion Matrix
MultiplyMatrix(&Help, &Diag, &BT);
MultiplyMatrix(Tensor, &B, &Help);
return 0;
}
