/// <summary>
/// Calculates centroid.
/// Centroid will be returned and stored in the blob structure. (cvCentroid)
/// </summary>
/// <param name="blob">Blob whose centroid will be calculated.</param>
/// <returns>Centroid.</returns>
public static CvPoint2D64f Centroid(CvBlob blob)
{
if (blob == null)
{
throw new ArgumentNullException("blob");
}
return CvBlobInvoke.cvb_cvCentroid(blob.CvPtr);
}
/// <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 Angle(CvBlob blob)
{
if (blob == null)
{
throw new ArgumentNullException("blob");
}
return CvBlobInvoke.cvb_cvAngle(blob.CvPtr);
}
/// <summary>
/// Calculates central moment for a blob.
/// Central moments will be stored in blob structure. (cvCentralMoments)
/// </summary>
/// <param name="blob">Blob.</param>
/// <param name="img">Label image (depth=IPL_DEPTH_LABEL and num. channels=1).</param>
public static void CentralMoments(CvBlob blob, IplImage img)
{
if (blob == null)
throw new ArgumentNullException("blob");
if (img == null)
throw new ArgumentNullException("img");
CvBlobInvoke.cvb_cvCentralMoments(blob.CvPtr, img.CvPtr);
}
/// <summary>
/// Set the ROI of an image to the bounding box of a blob.
/// </summary>
/// <param name="img">Image.</param>
/// <param name="blob">Blob.</param>
public static void SetImageROItoBlob(IplImage img, CvBlob blob)
{
if (img == null)
throw new ArgumentNullException("img");
if (blob == null)
throw new ArgumentNullException("blob");
CvBlobInvoke.cvb_cvSetImageROItoBlob(img.CvPtr, blob.CvPtr);
}
/// <summary>
/// Draws or prints information about a blob.
/// </summary>
/// <param name="imgLabel">Label image (depth=IPL_DEPTH_LABEL and num. channels=1).</param>
/// <param name="blob">Blob.</param>
/// <param name="imgSource">Input image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="imgDest">Output image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="mode">Render mode. By default is CV_BLOB_RENDER_COLOR|CV_BLOB_RENDER_CENTROID|CV_BLOB_RENDER_BOUNDING_BOX|CV_BLOB_RENDER_ANGLE.</param>
/// <param name="color">Color to render (if CV_BLOB_RENDER_COLOR is used).</param>
/// <param name="alpha">If mode CV_BLOB_RENDER_COLOR is used. 1.0 indicates opaque and 0.0 translucent (1.0 by default).</param>
public static void RenderBlob(IplImage imgLabel, CvBlob blob, IplImage imgSource, IplImage imgDest, RenderBlobsMode mode, CvScalar color, double alpha)
{
if (imgLabel == null)
throw new ArgumentNullException("imgLabel");
if (blob == null)
throw new ArgumentNullException("blob");
if (imgSource == null)
throw new ArgumentNullException("imgSource");
if (imgDest == null)
throw new ArgumentNullException("imgDest");
CvBlobInvoke.cvb_cvRenderBlob(imgLabel.CvPtr, blob.CvPtr, imgSource.CvPtr, imgDest.CvPtr, mode, color, alpha);
}
/// <summary>
/// Draws or prints information about a blob.
/// </summary>
/// <param name="imgLabel">Label image (depth=IPL_DEPTH_LABEL and num. channels=1).</param>
/// <param name="blob">Blob.</param>
/// <param name="imgSource">Input image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="imgDest">Output image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="mode">Render mode. By default is CV_BLOB_RENDER_COLOR|CV_BLOB_RENDER_CENTROID|CV_BLOB_RENDER_BOUNDING_BOX|CV_BLOB_RENDER_ANGLE.</param>
/// <param name="color">Color to render (if CV_BLOB_RENDER_COLOR is used).</param>
public static void RenderBlob(IplImage imgLabel, CvBlob blob, IplImage imgSource, IplImage imgDest, RenderBlobsMode mode, CvScalar color)
{
RenderBlob(imgLabel, blob, imgSource, imgDest, mode, color, 1.0);
}
/// <summary>
/// Draws or prints information about a blob.
/// </summary>
/// <param name="imgLabel">Label image (depth=IPL_DEPTH_LABEL and num. channels=1).</param>
/// <param name="blob">Blob.</param>
/// <param name="imgSource">Input image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="imgDest">Output image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="mode">Render mode. By default is CV_BLOB_RENDER_COLOR|CV_BLOB_RENDER_CENTROID|CV_BLOB_RENDER_BOUNDING_BOX|CV_BLOB_RENDER_ANGLE.</param>
public static void RenderBlob(IplImage imgLabel, CvBlob blob, IplImage imgSource, IplImage imgDest, RenderBlobsMode mode)
{
RenderBlob(imgLabel, blob, imgSource, imgDest, mode, CvColor.White, 1.0);
}
/// <summary>
/// Calculates mean color of a blob in an image.
/// </summary>
/// <param name="blob">Blob</param>
/// <param name="imgLabel">Image of labels.</param>
/// <param name="img">Original image.</param>
/// <returns>Average color.</returns>
public static CvScalar BlobMeanColor(CvBlob blob, IplImage imgLabel, IplImage img)
{
if (blob == null)
throw new ArgumentNullException("blob");
if (imgLabel == null)
throw new ArgumentNullException("imgLabel");
if (img == null)
throw new ArgumentNullException("img");
if (blob.IsDisposed)
throw new ObjectDisposedException("CvBlob");
return CvBlobInvoke.cvb_cvBlobMeanColor(blob.CvPtr, imgLabel.CvPtr, img.CvPtr);
}
