private static Rectangle[] FindRectangles(Image<Gray, byte> gray)
{
var result = new List<Rectangle>();
for (var contour = gray.FindContours(); contour != null; contour = contour.HNext) {
var rect = contour.BoundingRectangle;
result.Add(new Rectangle(rect.X, rect.Y, rect.Width - 1, rect.Height - 1));
// result.Add(rect);
}
return result.ToArray();
}
/// <summary>
/// Extract paper contours from an HSV image.
/// </summary>
/// <param name="binaryImage">HSV image to extract paper contours from.</param>
/// <returns>Paper contours extracted.</returns>
public List<Contour<Point>> extractPaperContours(Image<Gray, byte> binaryImage)
{
List<Contour<Point>> paperContours = new List<Contour<Point>>();
using(MemStorage storage = new MemStorage())
{
for (Contour<Point> contour = binaryImage.FindContours(); contour != null; contour = contour.HNext)
{
if((contour.BoundingRectangle.Height * contour.BoundingRectangle.Width) >= (binaryImage.Height * binaryImage.Width * CONTOUR_AREA_PERCENTAGE_THRESHOLD))
{
paperContours.Add(contour);
}
}
}
return paperContours;
}