private EnclosingRectangle FindEnclosingRectangle(ref Image <Gray, byte> grayscaleImage, Point center, ref Image <Rgb, byte> debugImage, Rectangle roi)
{
var binaryThreshold = BinaryThreshold;
var binaryThresholdImage = grayscaleImage.ThresholdBinary(new Gray(binaryThreshold), Grays.White);
#region Debug Binary Image
// Binary Threshold Image
var binaryThresholdImageCopy = binaryThresholdImage.Copy();
Task.Factory.StartNew(() =>
{
var bitmapSource = binaryThresholdImageCopy.ToBitmapSource(true);
binaryThresholdImageCopy.Dispose();
return(bitmapSource);
}).ContinueWith(t => BinaryThresholdImageBitmapSource = t.Result);
#endregion
var floodFillImage = binaryThresholdImage.Copy();
binaryThresholdImage.Dispose();
var imageWidth = floodFillImage.Width;
var imageHeight = floodFillImage.Height;
MCvConnectedComp comp;
// mask needs to be 2 pixels wider and 2 pixels taller
var mask = new Image <Gray, byte>(imageWidth + 2, imageHeight + 2);
CvInvoke.cvFloodFill(floodFillImage, center, new MCvScalar(255), new MCvScalar(FloodFillDifference), new MCvScalar(FloodFillDifference), out comp, CONNECTIVITY.FOUR_CONNECTED, FLOODFILL_FLAG.DEFAULT, mask);
#region Debug Flood Fill Image
//// Flood fill image
//var maskCopy = floodFillImage.Copy();
//Task.Factory.StartNew(() =>
//{
// var bitmapSource = maskCopy.ToBitmapSource(true);
// maskCopy.Dispose();
// return bitmapSource;
//}).ContinueWith(t => BinaryThresholdImageBitmapSource = t.Result);
#endregion
// shrink mask back to original grayscale image size
mask.ROI = new Rectangle(1, 1, imageWidth, imageHeight);
var contourBinaryImage = mask.Mul(255);
#region Debug Output Binary Image
//var maskCopy = contourBinaryImage.Copy();
//Task.Factory.StartNew(() =>
//{
// var bitmapSource = maskCopy.ToBitmapSource(true);
// maskCopy.Dispose();
// return bitmapSource;
//}).ContinueWith(t => BinaryThresholdImageBitmapSource = t.Result);
#endregion
mask.Dispose();
floodFillImage.Dispose();
EnclosingRectangle enclosingRectangle = null;
using (var storage = new MemStorage())
{
for (
var contours = contourBinaryImage.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE,
RETR_TYPE.CV_RETR_EXTERNAL, storage);
contours != null;
contours = contours.HNext)
{
var contour = contours.ApproxPoly(contours.Perimeter * 0.05, storage);
var contourBounds = contour.BoundingRectangle;
if (contourBounds.Width + 5 >= roi.Width || contourBounds.Height + 5 >= roi.Height)
{
continue;
}
if (!EmguExtensions.IsRectangle(contour, 10.0))
{
continue;
}
var edges = GetRightAngleEdges(contour);
if (IsRenderContent)
{
var debugImageRoi = debugImage.ROI;
debugImage.ROI = roi;
debugImage.Draw(contour.GetConvexHull(ORIENTATION.CV_CLOCKWISE), Rgbs.Cyan, 2);
debugImage.Draw(contour.GetMinAreaRect(storage), Rgbs.Cyan, 2);
DrawEdge(ref debugImage, edges[0], Rgbs.Red);
DrawEdge(ref debugImage, edges[1], Rgbs.Green);
debugImage.ROI = debugImageRoi;
}
enclosingRectangle = new EnclosingRectangle
{
Contour = contour,
LongEdge = edges[0],
ShortEdge = edges[1]
};
}
}
contourBinaryImage.Dispose();
return(enclosingRectangle);
}
internal void Sample(EnclosingRectangle rectangle)
{
DisplaySamples[SampleCounter] = rectangle;
SampleCounter++;
}
internal void Sample(EnclosingRectangle rectangle)
{
DisplaySamples[SampleCounter] = rectangle;
SampleCounter++;
}
private EnclosingRectangle FindEnclosingRectangle(ref Image<Gray, byte> grayscaleImage, Point center, ref Image<Rgb, byte> debugImage, Rectangle roi)
{
var binaryThreshold = BinaryThreshold;
var binaryThresholdImage = grayscaleImage.ThresholdBinary(new Gray(binaryThreshold), Grays.White);
#region Debug Binary Image
// Binary Threshold Image
var binaryThresholdImageCopy = binaryThresholdImage.Copy();
Task.Factory.StartNew(() =>
{
var bitmapSource = binaryThresholdImageCopy.ToBitmapSource(true);
binaryThresholdImageCopy.Dispose();
return bitmapSource;
}).ContinueWith(t => BinaryThresholdImageBitmapSource = t.Result);
#endregion
var floodFillImage = binaryThresholdImage.Copy();
binaryThresholdImage.Dispose();
var imageWidth = floodFillImage.Width;
var imageHeight = floodFillImage.Height;
MCvConnectedComp comp;
// mask needs to be 2 pixels wider and 2 pixels taller
var mask = new Image<Gray, byte>(imageWidth + 2, imageHeight + 2);
CvInvoke.cvFloodFill(floodFillImage, center, new MCvScalar(255), new MCvScalar(FloodFillDifference), new MCvScalar(FloodFillDifference), out comp, CONNECTIVITY.FOUR_CONNECTED, FLOODFILL_FLAG.DEFAULT, mask);
#region Debug Flood Fill Image
//// Flood fill image
//var maskCopy = floodFillImage.Copy();
//Task.Factory.StartNew(() =>
//{
// var bitmapSource = maskCopy.ToBitmapSource(true);
// maskCopy.Dispose();
// return bitmapSource;
//}).ContinueWith(t => BinaryThresholdImageBitmapSource = t.Result);
#endregion
// shrink mask back to original grayscale image size
mask.ROI = new Rectangle(1, 1, imageWidth, imageHeight);
var contourBinaryImage = mask.Mul(255);
#region Debug Output Binary Image
//var maskCopy = contourBinaryImage.Copy();
//Task.Factory.StartNew(() =>
//{
// var bitmapSource = maskCopy.ToBitmapSource(true);
// maskCopy.Dispose();
// return bitmapSource;
//}).ContinueWith(t => BinaryThresholdImageBitmapSource = t.Result);
#endregion
mask.Dispose();
floodFillImage.Dispose();
EnclosingRectangle enclosingRectangle = null;
using (var storage = new MemStorage())
{
for (
var contours = contourBinaryImage.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE,
RETR_TYPE.CV_RETR_EXTERNAL, storage);
contours != null;
contours = contours.HNext)
{
var contour = contours.ApproxPoly(contours.Perimeter * 0.05, storage);
var contourBounds = contour.BoundingRectangle;
if (contourBounds.Width + 5 >= roi.Width || contourBounds.Height + 5 >= roi.Height)
continue;
if (!EmguExtensions.IsRectangle(contour, 10.0)) continue;
var edges = GetRightAngleEdges(contour);
if (IsRenderContent)
{
var debugImageRoi = debugImage.ROI;
debugImage.ROI = roi;
debugImage.Draw(contour.GetConvexHull(ORIENTATION.CV_CLOCKWISE), Rgbs.Cyan, 2);
debugImage.Draw(contour.GetMinAreaRect(storage), Rgbs.Cyan, 2);
DrawEdge(ref debugImage, edges[0], Rgbs.Red);
DrawEdge(ref debugImage, edges[1], Rgbs.Green);
debugImage.ROI = debugImageRoi;
}
enclosingRectangle = new EnclosingRectangle
{
Contour = contour,
LongEdge = edges[0],
ShortEdge = edges[1]
};
}
}
contourBinaryImage.Dispose();
return enclosingRectangle;
}
