private async void StartScan(object sender, EventArgs e)
{
var scale = 0.4;
var stream = await TakePhoto();
Loader.IsRunning = true;
Loader.IsVisible = true;
LoaderGrid.IsVisible = true;
await Task.Delay(10);
var source = GetPixelMap(stream);
var imaging = new ImagingManager(source); //source is PixelMap, you can find samples how to convert image to PixelMap
imaging.AddFilter(new BicubicFilter(scale)); //Downscaling
imaging.AddFilter(new CannyEdgeDetector()); //This filter contains Grayscale and Gaussian filter in it
imaging.Render(); //Renders the image to use it further use
var blobCounter = new BlobCounter()
{
ObjectsOrder = ObjectsOrder.Size
};
imaging.AddFilter(blobCounter);
imaging.Render();
//Following code finds largest quadratical blob
List <Imaging.Library.Entities.Point> corners = null;
var blobs = blobCounter.GetObjectsInformation();
foreach (var blob in blobs)
{
var points = blobCounter.GetBlobsEdgePoints(blob);
var shapeChecker = new SimpleShapeChecker();
if (shapeChecker.IsQuadrilateral(points, out corners))
{
break;
}
}
imaging.UndoAll(); //Undo every filters applied
var edgePoints = new EdgePoints();
edgePoints.SetPoints(corners.ToArray());
edgePoints = edgePoints.ZoomIn(scale); //Corrects points that found on downscaled image to original
imaging.AddFilter(new QuadrilateralTransformation(edgePoints, true));
imaging.Render();
CovertedImage.Source = LoadImageFromPixelMap(imaging.Output);
//imaging.Output gives that extracted rectangle shape from photo. Check out WPF sample how to save it.
Loader.IsRunning = false;
Loader.IsVisible = false;
LoaderGrid.IsVisible = false;
await Task.Delay(10);
}
public void convert()
{
var imaging = new ImagingManager(Source);
var scale = 0.4;
imaging.AddFilter(new Imaging.Library.Filters.BasicFilters.BicubicFilter(scale)); //Downscaling
imaging.Render();
imaging.AddFilter(new CannyEdgeDetector());
imaging.Render();
var blobCounter = new BlobCounter
{
ObjectsOrder = ObjectsOrder.Size
};
imaging.AddFilter(blobCounter);
imaging.Render();
List <Point> corners = null;
var blobs = blobCounter.GetObjectsInformation();
foreach (var blob in blobs)
{
var points = blobCounter.GetBlobsEdgePoints(blob);
var shapeChecker = new SimpleShapeChecker();
if (shapeChecker.IsQuadrilateral(points, out corners))
{
break;
}
}
var edgePoints = new EdgePoints();
edgePoints.SetPoints(corners.ToArray());
imaging.Render();
imaging.UndoAll();
edgePoints = edgePoints.ZoomIn(scale);
imaging.AddFilter(new QuadrilateralTransformation(edgePoints, true));
imaging.Render();
var strm = StreamLoadFromPixel(imaging.Output);
var memoryStream = new MemoryStream();
strm.CopyTo(memoryStream);
DependencyService.Get <ISaveViewFile>().SaveAndViewAsync("out.jpg", memoryStream);
myimg.Source = LoadFromPixel(imaging.Output);
box.IsVisible = false;
loading.IsVisible = false;
loading.IsRunning = false;
stackloading.IsVisible = false;
}
private void ScanDocumentBtn_Click(object sender, EventArgs e)
{
var imaging = new ImagingManager(Source);
var scale = 0.4;
imaging.AddFilter(new BicubicFilter(scale)); //Downscaling
imaging.Render();
imaging.AddFilter(new CannyEdgeDetector());
imaging.Render();
var blobCounter = new BlobCounter
{
ObjectsOrder = ObjectsOrder.Size
};
imaging.AddFilter(blobCounter);
imaging.Render();
List <Point> corners = null;
var blobs = blobCounter.GetObjectsInformation();
foreach (var blob in blobs)
{
var points = blobCounter.GetBlobsEdgePoints(blob);
var shapeChecker = new SimpleShapeChecker();
if (shapeChecker.IsQuadrilateral(points, out corners))
{
break;
}
}
var edgePoints = new EdgePoints();
edgePoints.SetPoints(corners.ToArray());
imaging.Render();
imaging.UndoAll();
edgePoints = edgePoints.ZoomIn(scale);
imaging.AddFilter(new QuadrilateralTransformation(edgePoints, true));
imaging.Render();
var image = LoadFromPixelMap(imaging.Output);
var imageView = FindViewById <ImageView>(Resource.Id.myImageView);
imageView.SetImageBitmap(image);
}
private void EdgeDetection()
{
var dialog = new OpenFileDialog
{
InitialDirectory = @"D:\OneDrive",
Filter = "Bitmap|*.bmp;*.jpg;*.jpeg;*.png;"
};
if (dialog.ShowDialog() == true)
{
var scale = 0.4;
var path = dialog.FileName;
var sources = new PixelMap[2];
GetPixelMap(path, sources);
var source = sources[0];
var imaging = new ImagingManager(source);
imaging.AddFilter(new BicubicFilter(scale)); //Downscaling
imaging.Render();
imaging.AddFilter(new CannyEdgeDetector());
imaging.Render();
var blobCounter = new BlobCounter
{
ObjectsOrder = ObjectsOrder.Size
};
imaging.AddFilter(blobCounter);
imaging.Render();
List <Point> corners = null;
var blobs = blobCounter.GetObjectsInformation();
foreach (var blob in blobs)
{
var points = blobCounter.GetBlobsEdgePoints(blob);
var shapeChecker = new SimpleShapeChecker();
if (shapeChecker.IsQuadrilateral(points, out corners))
{
break;
}
}
var edgePoints = new EdgePoints();
edgePoints.SetPoints(corners.ToArray());
var line1 = new Line
{
X1 = edgePoints.TopLeft.X,
Y1 = edgePoints.TopLeft.Y,
X2 = edgePoints.BottomLeft.X,
Y2 = edgePoints.BottomLeft.Y
};
var line2 = new Line
{
X1 = edgePoints.BottomLeft.X,
Y1 = edgePoints.BottomLeft.Y,
X2 = edgePoints.BottomRight.X,
Y2 = edgePoints.BottomRight.Y
};
var line3 = new Line
{
X1 = edgePoints.BottomRight.X,
Y1 = edgePoints.BottomRight.Y,
X2 = edgePoints.TopRight.X,
Y2 = edgePoints.TopRight.Y
};
var line4 = new Line
{
X1 = edgePoints.TopRight.X,
Y1 = edgePoints.TopRight.Y,
X2 = edgePoints.TopLeft.X,
Y2 = edgePoints.TopLeft.Y
};
var pixel = new Pixel(255, 255, 0, 0);
imaging.AddFilter(new LineDrawFilter(line1, pixel));
imaging.AddFilter(new LineDrawFilter(line2, pixel));
imaging.AddFilter(new LineDrawFilter(line3, pixel));
imaging.AddFilter(new LineDrawFilter(line4, pixel));
imaging.Render();
image.Source = LoadFromPixelMap(imaging.Output);
imaging.UndoAll();
edgePoints = edgePoints.ZoomIn(scale);
imaging.AddFilter(new QuadrilateralTransformation(edgePoints, true));
imaging.Render();
image2.Source = LoadFromPixelMap(imaging.Output);
SaveImageToFile(LoadFromPixelMap(imaging.Output), @"D:\Desktop\2.jpg");
}
}
