/// <summary>
/// computes the distance transform map
/// </summary>
/// <param name="src"></param>
/// <param name="dst"></param>
/// <param name="distanceType"></param>
/// <param name="maskSize"></param>
public static void DistanceTransform(InputArray src,
OutputArray dst,
DistanceType distanceType,
DistanceMaskSize maskSize)
{
if (src == null)
throw new ArgumentNullException("src");
if (dst == null)
throw new ArgumentNullException("dst");
src.ThrowIfDisposed();
dst.ThrowIfNotReady();
NativeMethods.imgproc_distanceTransform(
src.CvPtr, dst.CvPtr, (int)distanceType, (int)maskSize);
dst.Fix();
}
/// <summary>
/// computes the distance transform map
/// </summary>
/// <param name="distanceType"></param>
/// <param name="maskSize"></param>
public MatOfFloat DistanceTransform(DistanceType distanceType, DistanceMaskSize maskSize)
{
var dst = new MatOfFloat();
Cv2.DistanceTransform(this, dst, distanceType, maskSize);
return dst;
}
// ReSharper restore InconsistentNaming
#endregion
#region DistanceTransform
/// <summary>
/// builds the discrete Voronoi diagram
/// </summary>
/// <param name="src"></param>
/// <param name="dst"></param>
/// <param name="labels"></param>
/// <param name="distanceType"></param>
/// <param name="maskSize"></param>
/// <param name="labelType"></param>
public static void DistanceTransformWithLabels(InputArray src,
OutputArray dst,
OutputArray labels,
DistanceType distanceType,
DistanceMaskSize maskSize,
DistTransformLabelType labelType = DistTransformLabelType.CComp)
{
if (src == null)
throw new ArgumentNullException("src");
if (dst == null)
throw new ArgumentNullException("dst");
if (labels == null)
throw new ArgumentNullException("labels");
src.ThrowIfDisposed();
dst.ThrowIfNotReady();
labels.ThrowIfNotReady();
NativeMethods.imgproc_distanceTransformWithLabels(
src.CvPtr, dst.CvPtr, labels.CvPtr, (int)distanceType, (int)maskSize, (int)labelType);
dst.Fix();
labels.Fix();
}
public static void DistanceTransform(bool negative = false, DistanceTypes distanceType = DistanceTypes.L2, DistanceMaskSize distanceMaskSize = DistanceMaskSize.Mask3)
{
Glb.DrawMatAndHist0(Glb.matSrc);
var matThr = Glb.matSrc.CvtColor(ColorConversionCodes.BGR2GRAY).Threshold(128, 255, ThresholdTypes.Otsu);
if (negative)
{
Cv2.BitwiseNot(matThr, matThr);
}
Glb.DrawMatAndHist1(matThr);
var matDist = matThr.DistanceTransform(distanceType, distanceMaskSize);
var x1 = matDist.Min();
var x2 = matDist.Max();
float y1 = 0;
float y2 = 255;
double scale = (y2 - y1) / (x2 - x1);
double offset = (x2 * y1 - x1 * y2) / (x2 - x1);
var matDistColor = new Mat();
matDist.ConvertTo(matDistColor, MatType.CV_8UC1, scale, offset);
Glb.DrawMatAndHist2(matDistColor);
matThr.Dispose();
matDist.Dispose();
matDistColor.Dispose();
}
