public Rectangle DetectEdges(Bitmap source)
{
var fastSource = new FastBitmap(source);
fastSource.LockImage();
var(X, Width) = DetectVerticalLines(fastSource);
var(Y, Height) = DetectHorizontalLines(fastSource);
fastSource.UnlockImage();
if (Width > 0 && Height > 0)
{
Width -= 8;
X += 4;
Height -= 8;
Y += 4;
var rectangle = new Rectangle(X, Y, Width, Height);
RectangleDetected?.Invoke(this, new RectangleEventArgs(rectangle));
return(rectangle);
}
return(Rectangle.Empty);
}
Bitmap Crop(Bitmap source, Rectangle rectangle)
{
var fastSource = new FastBitmap(source);
var croppedImage = new Bitmap(rectangle.Width, rectangle.Height);
var fastCroppedImage = new FastBitmap(croppedImage);
fastCroppedImage.LockImage();
fastSource.LockImage();
for (int y = rectangle.Y, startY = rectangle.Y, endY = rectangle.Y + rectangle.Height; y < endY; y++)
{
for (int x = rectangle.X, startX = rectangle.X, endX = rectangle.X + rectangle.Width; x < endX; x++)
{
var pixel = fastSource.GetPixel(x, y);
fastCroppedImage.SetPixel(x - startX, y - startY, pixel);
}
}
fastCroppedImage.UnlockImage();
fastSource.UnlockImage();
return(croppedImage);
}