// Hough transform
private void PerformHoughTransform(Image <Gray, Byte> ImageToProcess,
int HoughCircleThreshold, int MinAccumulator, int MaxAccumulator,
double Resolution, double MinDistance,
int MinRadius, int MaxRadius, HoughTransformFlag Mode)
{
//Accumulator value
int currentAccumulator = MinAccumulator;
//Threshold value
Gray threshold = new Gray(HoughCircleThreshold);
//start incrementing the accumilator till we find a proper circle
while (currentAccumulator < MaxAccumulator)
{
Gray accumulator = new Gray(currentAccumulator);
//apply hough circle
CircleF[] detectedCircles = ImageToProcess.HoughCircles(threshold, accumulator, Resolution, MinDistance, MinRadius, MaxRadius)[0];
if (detectedCircles.Length == 1)
{
foreach (CircleF circle in detectedCircles)
{
switch (Mode)
{
//Hough Transform for pupil
case HoughTransformFlag.Pupil:
ImageToProcess.Draw(circle, new Gray(200), 2);
ContourDetectedPupilImageColor.Draw(circle, new Bgr(0, 0, 255), 2);
PupilCenter.X = (int)circle.Center.X;
PupilCenter.Y = (int)circle.Center.Y;
break;
//For outer Boundary
case HoughTransformFlag.IrisOuterBoundary:
IrisOuterBoundaryImageColor = ContourDetectedPupilImageColor.Clone();
ImageToProcess.Draw(circle, new Gray(200), 2);
//Radius of the outer boundary
OuterBoundaryRadius = (int)circle.Radius;
CvInvoke.cvCircle(IrisOuterBoundaryImageColor, PupilCenter, OuterBoundaryRadius, IrisConstants.WhiteColor, 2, Emgu.CV.CvEnum.LINE_TYPE.CV_AA, 0);
break;
}
}
break;
}
else if (detectedCircles.Length != 1)
{
currentAccumulator++;
}
}
}
// Hough transform
private void PerformHoughTransform(Image<Gray, Byte> ImageToProcess,
int HoughCircleThreshold, int MinAccumulator, int MaxAccumulator,
double Resolution, double MinDistance,
int MinRadius, int MaxRadius, HoughTransformFlag Mode)
{
//Accumulator value
int currentAccumulator = MinAccumulator;
//Threshold value
Gray threshold = new Gray(HoughCircleThreshold);
//start incrementing the accumilator till we find a proper circle
while (currentAccumulator < MaxAccumulator)
{
Gray accumulator = new Gray(currentAccumulator);
//apply hough circle
CircleF[] detectedCircles = ImageToProcess.HoughCircles(threshold, accumulator, Resolution, MinDistance, MinRadius, MaxRadius)[0];
if (detectedCircles.Length == 1)
{
foreach (CircleF circle in detectedCircles)
{
switch (Mode)
{
//Hough Transform for pupil
case HoughTransformFlag.Pupil:
ImageToProcess.Draw(circle, new Gray(200), 2);
ContourDetectedPupilImageColor.Draw(circle, new Bgr(0, 0, 255), 2);
PupilCenter.X = (int)circle.Center.X;
PupilCenter.Y = (int)circle.Center.Y;
break;
//For outer Boundary
case HoughTransformFlag.IrisOuterBoundary:
IrisOuterBoundaryImageColor = ContourDetectedPupilImageColor.Clone();
ImageToProcess.Draw(circle, new Gray(200), 2);
//Radius of the outer boundary
OuterBoundaryRadius = (int)circle.Radius;
CvInvoke.cvCircle(IrisOuterBoundaryImageColor, PupilCenter, OuterBoundaryRadius, IrisConstants.WhiteColor, 2, Emgu.CV.CvEnum.LINE_TYPE.CV_AA, 0);
break;
}
}
break;
}
else if (detectedCircles.Length != 1)
{
currentAccumulator++;
}
}
}
