/// <summary>
/// find contours in the image
/// </summary>
/// <param name="local"> the image </param>
/// <param name="cHAIN_APPROX_METHOD">param provided to the opencv function</param>
/// <param name="rETR_TYPE">param provided to the opencv function</param>
/// <param name="stor">param provided to the opencv function </param>
/// <remarks>For more information about previous parameters and contours see opencv book chapter 8 And/Or opencv reference manual v2.1 March 18, 2010 page 343 </remarks>
/// <returns> the founded contours </returns>
private Contour <Point> FindContours(Image <Gray, byte> local, CHAIN_APPROX_METHOD cHAIN_APPROX_METHOD, RETR_TYPE rETR_TYPE, MemStorage stor)
{
using (Image <Gray, byte> imagecopy = local.Copy()) //since cvFindContours modifies the content of the source, we need to make a clone
{
IntPtr seq = IntPtr.Zero;
CvInvoke.cvFindContours(
imagecopy.Ptr,
stor.Ptr,
ref seq,
StructSize.MCvContour,
rETR_TYPE,
cHAIN_APPROX_METHOD,
new Point(local.ROI.X, local.ROI.Y));// because of ROI, the contour is offset or shifted
return((seq == IntPtr.Zero) ? null : new Contour <Point>(seq, stor));
}
}
private Contour<Point> FindContours(Image<Gray, byte> local, CHAIN_APPROX_METHOD cHAIN_APPROX_METHOD, RETR_TYPE rETR_TYPE, MemStorage stor)
{
using (Image<Gray, byte> imagecopy = local.Copy()) //since cvFindContours modifies the content of the source, we need to make a clone
{
IntPtr seq = IntPtr.Zero;
CvInvoke.cvFindContours(
imagecopy.Ptr,
stor.Ptr,
ref seq,
StructSize.MCvContour,
rETR_TYPE,
cHAIN_APPROX_METHOD,
new Point(local.ROI.X, local.ROI.Y));// because of ROI, the contour is offset or shifted
return (seq == IntPtr.Zero) ? null : new Contour<Point>(seq, stor);
}
}