EmguCV - MatchTemplate

Question

I have some code like this to find all instances of the template in the result image.

Image<Gray, Byte> templateImage = new Image<Gray, Byte>(bmpSnip);
Image<Gray, float> imgMatch = sourceImage.MatchTemplate(templateImage, Emgu.CV.CvEnum.TM_TYPE.CV_TM_CCOEFF_NORMED);

and then looping through the imgMatch.Data[,,] Property check if the score exceeds a threshold (say > 0.75) and place markers on the image about a match. But the matches make no sense whatsoever, I suspect I am getting the co-ordinates wrong.

        float[,,] matches = imgMatch.Data;
        for (int x = 0; x < matches.GetLength(0); x++)
        {
            for (int y = 0; y < matches.GetLength(1); y++)
            {
                double matchScore = matches[x, y, 0];
                if (matchScore > 0.75)
                {
                    Rectangle rect = new Rectangle(new Point(x,y), new Size(1, 1));
                    imgSource.Draw(rect, new Bgr(Color.Blue), 1);
                }

            }

        }

If I use the MinMax as below:

double[] min, max;
Point[] pointMin, pointMax;
imgMatch.MinMax(out min, out max, out pointMin, out pointMax);

and set a marker (rectangle) to highlight a match I get a very good result. So I am pretty sure it has to do with identifying co-ordinates for imgMatch.Data[,,]

Any ideas on where I am wrong?

Answer 1

Closing it down. No responses, used a different approach