Filter to mark (highlight) corners of objects.
The filter highlights corners of objects on the image using provided corners detection algorithm.
The filter accepts 8 bpp grayscale and 24/32 color images for processing.
Sample usage:
// create corner detector's instance SusanCornersDetector scd = new SusanCornersDetector( ); // create corner maker filter CornersMarker filter = new CornersMarker( scd, Color.Red ); // apply the filter filter.ApplyInPlace( image ); Initial image:
Result image:
private void button1_Click(object sender, EventArgs e)
{
// Open a image
Bitmap lenna = Properties.Resources.lena512;
double sigma = (double)numSigma.Value;
float k = (float)numK.Value;
float threshold = (float)numThreshold.Value;
// Create a new Harris Corners Detector using the given parameters
HarrisCornersDetector harris = new HarrisCornersDetector(k)
{
Measure = checkBox1.Checked ?
HarrisCornerMeasure.Harris : HarrisCornerMeasure.Noble,
Threshold = threshold,
Sigma = sigma
};
// Create a new AForge's Corner Marker Filter
CornersMarker corners = new CornersMarker(harris, Color.White);
// Apply the filter and display it on a picturebox
pictureBox1.Image = corners.Apply(lenna);
}
private void button1_Click(object sender, EventArgs e)
{
// Open a image
Bitmap lenna = Properties.Resources.lena512;
// Create a new SURF Features Detector using the given parameters
FastCornersDetector fast = new FastCornersDetector()
{
Threshold = (int)numThreshold.Value,
Suppress = true
};
// Create a new AForge's Corner Marker Filter
CornersMarker corners = new CornersMarker(fast, Color.White);
// Apply the filter and display it on a picturebox
pictureBox1.Image = corners.Apply(lenna);
}
