/// <summary>
/// Calculates angle orientation of a blob.
/// This function uses central moments so cvCentralMoments should have been called before for this blob. (cvAngle)
/// </summary>
/// <param name="blob">Blob.</param>
/// <returns>Angle orientation in radians.</returns>
public static double CalcAngle(CvBlob blob)
{
if (blob == null)
{
throw new ArgumentNullException("blob");
}
return(blob.Angle());
}
/// <summary>
///
/// </summary>
/// <param name="labels"></param>
/// <param name="blob"></param>
/// <param name="imgSrc"></param>
/// <param name="imgDst"></param>
/// <param name="mode"></param>
/// <param name="color"></param>
/// <param name="alpha"></param>
public static void PerformOne(LabelData labels, CvBlob blob, Mat imgSrc, Mat imgDst,
RenderBlobsMode mode, Scalar color, double alpha)
{
if (labels == null)
{
throw new ArgumentNullException(nameof(labels));
}
if (blob == null)
{
throw new ArgumentNullException(nameof(blob));
}
if (imgSrc == null)
{
throw new ArgumentNullException(nameof(imgSrc));
}
if (imgDst == null)
{
throw new ArgumentNullException(nameof(imgDst));
}
if (imgDst.Type() != MatType.CV_8UC3)
{
throw new ArgumentException("'img' must be a 3-channel U8 image.");
}
if ((mode & RenderBlobsMode.Color) == RenderBlobsMode.Color)
{
var pSrc = imgSrc.GetGenericIndexer <Vec3b>();
var pDst = imgDst.GetGenericIndexer <Vec3b>();
for (int r = blob.MinY; r <= blob.MaxY; r++)
{
for (int c = blob.MinX; c <= blob.MaxX; c++)
{
if (labels[r, c] == blob.Label)
{
byte v0 = (byte)((1.0 - alpha) * pSrc[r, c].Item0 + alpha * color.Val0);
byte v1 = (byte)((1.0 - alpha) * pSrc[r, c].Item1 + alpha * color.Val1);
byte v2 = (byte)((1.0 - alpha) * pSrc[r, c].Item2 + alpha * color.Val2);
pDst[r, c] = new Vec3b(v0, v1, v2);
}
}
}
}
if (mode != RenderBlobsMode.None)
{
if ((mode & RenderBlobsMode.BoundingBox) == RenderBlobsMode.BoundingBox)
{
Cv2.Rectangle(
imgDst,
new Point(blob.MinX, blob.MinY),
new Point(blob.MaxX, blob.MaxY),
new Scalar(255, 0, 0));
}
if ((mode & RenderBlobsMode.Angle) == RenderBlobsMode.Angle)
{
double angle = blob.Angle();
double lengthLine = Math.Max(blob.MaxX - blob.MinX, blob.MaxY - blob.MinY) / 2.0;
double x1 = blob.Centroid.X - lengthLine * Math.Cos(angle);
double y1 = blob.Centroid.Y - lengthLine * Math.Sin(angle);
double x2 = blob.Centroid.X + lengthLine * Math.Cos(angle);
double y2 = blob.Centroid.Y + lengthLine * Math.Sin(angle);
Cv2.Line(imgDst, new Point((int)x1, (int)y1), new Point((int)x2, (int)y2),
new Scalar(0, 255, 0));
}
if ((mode & RenderBlobsMode.Centroid) == RenderBlobsMode.Centroid)
{
Cv2.Line(imgDst,
new Point((int)blob.Centroid.X - 3, (int)blob.Centroid.Y),
new Point((int)blob.Centroid.X + 3, (int)blob.Centroid.Y),
new Scalar(255, 0, 0));
Cv2.Line(imgDst,
new Point((int)blob.Centroid.X, (int)blob.Centroid.Y - 3),
new Point((int)blob.Centroid.X, (int)blob.Centroid.Y + 3),
new Scalar(255, 0, 0));
}
}
}
/// <summary>
/// Calculates angle orientation of a blob.
/// This function uses central moments so cvCentralMoments should have been called before for this blob. (cvAngle)
/// </summary>
/// <param name="blob">Blob.</param>
/// <returns>Angle orientation in radians.</returns>
public static double CalcAngle(CvBlob blob)
{
if (blob == null)
throw new ArgumentNullException(nameof(blob));
return blob.Angle();
}
/// <summary>
///
/// </summary>
/// <param name="labels"></param>
/// <param name="blob"></param>
/// <param name="imgSrc"></param>
/// <param name="imgDst"></param>
/// <param name="mode"></param>
/// <param name="color"></param>
/// <param name="alpha"></param>
public static unsafe void PerformOne(LabelData labels, CvBlob blob, Mat imgSrc, Mat imgDst,
RenderBlobsMode mode, Scalar color, double alpha)
{
if (labels == null)
throw new ArgumentNullException("labels");
if (blob == null)
throw new ArgumentNullException("blob");
if (imgSrc == null)
throw new ArgumentNullException("imgSrc");
if (imgDst == null)
throw new ArgumentNullException("imgDst");
if (imgDst.Type() != MatType.CV_8UC3)
throw new ArgumentException("'img' must be a 3-channel U8 image.");
if ((mode & RenderBlobsMode.Color) == RenderBlobsMode.Color)
{
var pSrc = imgSrc.GetGenericIndexer<Vec3b>();
var pDst = imgDst.GetGenericIndexer<Vec3b>();
for (int r = blob.MinY; r < blob.MaxY; r++)
{
for (int c = blob.MinX; c < blob.MaxX; c++)
{
if (labels[r, c] == blob.Label)
{
byte v0 = (byte) ((1.0 - alpha)*pSrc[r, c].Item0 + alpha*color.Val0);
byte v1 = (byte) ((1.0 - alpha)*pSrc[r, c].Item1 + alpha*color.Val1);
byte v2 = (byte) ((1.0 - alpha)*pSrc[r, c].Item2 + alpha*color.Val2);
pDst[r, c] = new Vec3b(v0, v1, v2);
}
}
}
}
if (mode != RenderBlobsMode.None)
{
if ((mode & RenderBlobsMode.BoundingBox) == RenderBlobsMode.BoundingBox)
{
Cv2.Rectangle(
imgDst,
new Point(blob.MinX, blob.MinY),
new Point(blob.MaxX - 1, blob.MaxY - 1),
new Scalar(255, 0, 0));
}
if ((mode & RenderBlobsMode.Angle) == RenderBlobsMode.Angle)
{
double angle = blob.Angle();
double lengthLine = Math.Max(blob.MaxX - blob.MinX, blob.MaxY - blob.MinY) / 2.0;
double x1 = blob.Centroid.X - lengthLine * Math.Cos(angle);
double y1 = blob.Centroid.Y - lengthLine * Math.Sin(angle);
double x2 = blob.Centroid.X + lengthLine * Math.Cos(angle);
double y2 = blob.Centroid.Y + lengthLine * Math.Sin(angle);
Cv2.Line(imgDst, new Point((int)x1, (int)y1), new Point((int)x2, (int)y2),
new Scalar(0, 255, 0));
}
if ((mode & RenderBlobsMode.Centroid) == RenderBlobsMode.Centroid)
{
Cv2.Line(imgDst,
new Point((int)blob.Centroid.X - 3, (int)blob.Centroid.Y),
new Point((int)blob.Centroid.X + 3, (int)blob.Centroid.Y),
new Scalar(255, 0, 0));
Cv2.Line(imgDst,
new Point((int)blob.Centroid.X, (int)blob.Centroid.Y - 3),
new Point((int)blob.Centroid.X, (int)blob.Centroid.Y + 3),
new Scalar(255, 0, 0));
}
}
}
/// <summary>
///
/// </summary>
/// <param name="labels"></param>
/// <param name="blob"></param>
/// <param name="imgSrc"></param>
/// <param name="imgDst"></param>
/// <param name="mode"></param>
/// <param name="color"></param>
/// <param name="alpha"></param>
public static unsafe void PerformOne(LabelData labels, CvBlob blob, IplImage imgSrc, IplImage imgDst,
RenderBlobsMode mode, CvScalar color, double alpha)
{
if (labels == null)
throw new ArgumentNullException("labels");
if (blob == null)
throw new ArgumentNullException("blob");
if (imgSrc == null)
throw new ArgumentNullException("imgSrc");
if (imgDst == null)
throw new ArgumentNullException("imgDst");
if (imgDst.Depth != BitDepth.U8 || imgDst.NChannels != 3)
throw new ArgumentException("'img' must be a 3-channel U8 image.");
if ((mode & RenderBlobsMode.Color) == RenderBlobsMode.Color)
{
int stepSrc = imgSrc.WidthStep;
int stepDst = imgDst.WidthStep;
int offsetSrc = 0;
int offsetDst = 0;
CvRect roiSrc = imgSrc.ROI;
CvRect roiDst = imgDst.ROI;
if (roiSrc.Size != imgSrc.Size)
offsetSrc = roiSrc.Y * stepSrc + roiSrc.X;
if (roiDst.Size != imgDst.Size)
offsetDst = roiDst.Y * stepDst + roiDst.X;
byte* pSrc = (byte*)imgSrc.ImageData + offsetSrc + (blob.MinY * stepSrc);
byte* pDst = (byte*)imgDst.ImageData + offsetDst + (blob.MinY * stepDst);
for (int r = blob.MinY; r < blob.MaxY; r++)
{
for (int c = blob.MinX; c < blob.MaxX; c++)
{
if (labels[r, c] == blob.Label)
{
pDst[c*3 + 0] = (byte) ((1.0 - alpha)*pSrc[c + 0] + alpha*color.Val0);
pDst[c*3 + 1] = (byte) ((1.0 - alpha)*pSrc[c + 1] + alpha*color.Val1);
pDst[c*3 + 2] = (byte) ((1.0 - alpha)*pSrc[c + 2] + alpha*color.Val2);
}
}
pSrc += stepSrc;
pDst += stepDst;
}
}
if (mode != RenderBlobsMode.None)
{
if ((mode & RenderBlobsMode.BoundingBox) == RenderBlobsMode.BoundingBox)
{
Cv.Rectangle(
imgDst,
new CvPoint(blob.MinX, blob.MinY),
new CvPoint(blob.MaxX - 1, blob.MaxY - 1),
new CvColor(255, 0, 0));
}
if ((mode & RenderBlobsMode.Angle) == RenderBlobsMode.Angle)
{
double angle = blob.Angle();
double lengthLine = Math.Max(blob.MaxX - blob.MinX, blob.MaxY - blob.MinY) / 2.0;
double x1 = blob.Centroid.X - lengthLine * Math.Cos(angle);
double y1 = blob.Centroid.Y - lengthLine * Math.Sin(angle);
double x2 = blob.Centroid.X + lengthLine * Math.Cos(angle);
double y2 = blob.Centroid.Y + lengthLine * Math.Sin(angle);
Cv.Line(imgDst, new CvPoint((int)x1, (int)y1), Cv.Point((int)x2, (int)y2),
new CvColor(0, 255, 0));
}
if ((mode & RenderBlobsMode.Centroid) == RenderBlobsMode.Centroid)
{
Cv.Line(imgDst,
new CvPoint((int)blob.Centroid.X - 3, (int)blob.Centroid.Y),
new CvPoint((int)blob.Centroid.X + 3, (int)blob.Centroid.Y),
new CvColor(0, 0, 255));
Cv.Line(imgDst,
new CvPoint((int)blob.Centroid.X, (int)blob.Centroid.Y - 3),
new CvPoint((int)blob.Centroid.X, (int)blob.Centroid.Y + 3),
new CvColor(0, 0, 255));
}
}
}
/// <summary>
///
/// </summary>
/// <param name="labels"></param>
/// <param name="blob"></param>
/// <param name="imgSrc"></param>
/// <param name="imgDst"></param>
/// <param name="mode"></param>
/// <param name="color"></param>
/// <param name="alpha"></param>
public static unsafe void PerformOne(LabelData labels, CvBlob blob, IplImage imgSrc, IplImage imgDst,
RenderBlobsMode mode, CvScalar color, double alpha)
{
if (labels == null)
{
throw new ArgumentNullException("labels");
}
if (blob == null)
{
throw new ArgumentNullException("blob");
}
if (imgSrc == null)
{
throw new ArgumentNullException("imgSrc");
}
if (imgDst == null)
{
throw new ArgumentNullException("imgDst");
}
if (imgDst.Depth != BitDepth.U8 || imgDst.NChannels != 3)
{
throw new ArgumentException("'img' must be a 3-channel U8 image.");
}
if ((mode & RenderBlobsMode.Color) == RenderBlobsMode.Color)
{
int stepSrc = imgSrc.WidthStep;
int stepDst = imgDst.WidthStep;
int offsetSrc = 0;
int offsetDst = 0;
CvRect roiSrc = imgSrc.ROI;
CvRect roiDst = imgDst.ROI;
if (roiSrc.Size != imgSrc.Size)
{
offsetSrc = roiSrc.Y * stepSrc + roiSrc.X;
}
if (roiDst.Size != imgDst.Size)
{
offsetDst = roiDst.Y * stepDst + roiDst.X;
}
byte *pSrc = (byte *)imgSrc.ImageData + offsetSrc + (blob.MinY * stepSrc);
byte *pDst = (byte *)imgDst.ImageData + offsetDst + (blob.MinY * stepDst);
for (int r = blob.MinY; r < blob.MaxY; r++)
{
for (int c = blob.MinX; c < blob.MaxX; c++)
{
if (labels[r, c] == blob.Label)
{
pDst[c * 3 + 0] = (byte)((1.0 - alpha) * pSrc[c + 0] + alpha * color.Val0);
pDst[c * 3 + 1] = (byte)((1.0 - alpha) * pSrc[c + 1] + alpha * color.Val1);
pDst[c * 3 + 2] = (byte)((1.0 - alpha) * pSrc[c + 2] + alpha * color.Val2);
}
}
pSrc += stepSrc;
pDst += stepDst;
}
}
if (mode != RenderBlobsMode.None)
{
if ((mode & RenderBlobsMode.BoundingBox) == RenderBlobsMode.BoundingBox)
{
Cv.Rectangle(
imgDst,
new CvPoint(blob.MinX, blob.MinY),
new CvPoint(blob.MaxX - 1, blob.MaxY - 1),
new CvColor(255, 0, 0));
}
if ((mode & RenderBlobsMode.Angle) == RenderBlobsMode.Angle)
{
double angle = blob.Angle();
double lengthLine = Math.Max(blob.MaxX - blob.MinX, blob.MaxY - blob.MinY) / 2.0;
double x1 = blob.Centroid.X - lengthLine * Math.Cos(angle);
double y1 = blob.Centroid.Y - lengthLine * Math.Sin(angle);
double x2 = blob.Centroid.X + lengthLine * Math.Cos(angle);
double y2 = blob.Centroid.Y + lengthLine * Math.Sin(angle);
Cv.Line(imgDst, new CvPoint((int)x1, (int)y1), Cv.Point((int)x2, (int)y2),
new CvColor(0, 255, 0));
}
if ((mode & RenderBlobsMode.Centroid) == RenderBlobsMode.Centroid)
{
Cv.Line(imgDst,
new CvPoint((int)blob.Centroid.X - 3, (int)blob.Centroid.Y),
new CvPoint((int)blob.Centroid.X + 3, (int)blob.Centroid.Y),
new CvColor(0, 0, 255));
Cv.Line(imgDst,
new CvPoint((int)blob.Centroid.X, (int)blob.Centroid.Y - 3),
new CvPoint((int)blob.Centroid.X, (int)blob.Centroid.Y + 3),
new CvColor(0, 0, 255));
}
}
}
