public void RunEdgeDetection(EdgeDetectionOptions options)
{
if (HasRunEdgeDetection)
{
return;
}
using (Bitmap newBitmap = LoadBitmap())
{
Rectangle rect = new Rectangle(0, 0, newBitmap.Width, newBitmap.Height);
using (UnmanagedImage image = new UnmanagedImage(newBitmap.LockBits(rect, ImageLockMode.ReadWrite, newBitmap.PixelFormat)))
{
using (UnmanagedImage grayImage = UnmanagedImage.Create(image.Width, image.Height, PixelFormat.Format8bppIndexed))
{
Grayscale.CommonAlgorithms.BT709.Apply(image, grayImage);
Threshold threshold = new Threshold(options.Threshold);
using (UnmanagedImage edgesImage = EDGE_DETECTOR.Apply(grayImage))
{
Threshold thresholdFilter = new Threshold(options.Threshold);
thresholdFilter.ApplyInPlace(edgesImage);
if (options.ShowEdgesImage)
{
ImageForm.ShowImage("Enhanced Edges Image", edgesImage);
}
BlobCounter blobCounter = new BlobCounter();
blobCounter.MinHeight = MINIMUM_BLOB_SIZE;
blobCounter.MinWidth = MINIMUM_BLOB_SIZE;
blobCounter.FilterBlobs = true;
blobCounter.ObjectsOrder = ObjectsOrder.Size;
blobCounter.ProcessImage(edgesImage);
Blob[] blobs = blobCounter.GetObjectsInformation();
Corners.Clear();
foreach (Blob blob in blobs)
{
List <IntPoint> edgePoints = blobCounter.GetBlobsEdgePoints(blob);
List <IntPoint> corners = null;
if (SHAPE_CHECKER.IsQuadrilateral(edgePoints, out corners))
{
List <IntPoint> leftEdgePoints, rightEdgePoints;
blobCounter.GetBlobsLeftAndRightEdges(blob, out leftEdgePoints, out rightEdgePoints);
Corners.Add(corners);
if (options.ShowBlobImages)
{
QuadrilateralTransformation quadTransformation = new QuadrilateralTransformation(corners, 200, 200);
using (UnmanagedImage quadImage = quadTransformation.Apply(image))
{
ImageForm.ShowImage("Quad Image", quadImage);
}
}
}
}
}
}
}
}
}