BorderType GetBorderType(HarrisBorderType type)
{
switch (type)
{
case HarrisBorderType.Constant:
return(BorderType.Constant);
case HarrisBorderType.Replicate:
return(BorderType.Replicate);
case HarrisBorderType.Reflect:
return(BorderType.Reflect);
case HarrisBorderType.Wrap:
return(BorderType.Wrap);
case HarrisBorderType.Reflect101:
return(BorderType.Reflect101);
case HarrisBorderType.Transparent:
return(BorderType.Transparent);
case HarrisBorderType.Isolated:
return(BorderType.Isolated);
default:
return(BorderType.Default);
}
}
public AlgorithmResult DetectCornerHarris(
string filename,
byte threshold,
int blockSize,
int apertureSize,
double k,
HarrisBorderType borderType)
{
AlgorithmResult result = new AlgorithmResult();
Image <Bgr, byte> image = ImageHelper.GetImage(filename);
var resultImage = new Image <Bgr, byte>(filename);
// Create new (gray, float) image for corner
var corners = new Image <Gray, float>(image.Size);
// Harris corner with GrayScale
CvInvoke.CornerHarris(
image.Convert <Gray, byte>(),
corners,
blockSize,
apertureSize,
k,
GetBorderType(borderType));
// Normalize
CvInvoke.Normalize(corners, corners);
// Set resultImage after normalizing
resultImage = corners.Convert <Bgr, byte>();
// Crate new (gray, byte) image for corner
var gray = corners.Convert <Gray, byte>();
result.CircleDatas = new List <CirclePointModel>();
// for each pixel annotate the corner
// if inensity is beyond the threshold
for (var j = 0; j < gray.Rows; j++)
{
for (var i = 0; i < gray.Cols; i++)
{
if (!(gray[j, i].Intensity > threshold))
{
continue;
}
var circle = new CircleF(new PointF(i, j), 1);
resultImage.Draw(circle, new Bgr(Color.FromArgb(255, 77, 77)), 3);
result.CircleDatas.Add(new CirclePointModel()
{
CenterX = circle.Center.X,
CenterY = circle.Center.Y,
Radius = circle.Radius,
Area = circle.Area
});
}
}
result.ImageArray = ImageHelper.SetImage(resultImage);
return(result);
}
