/// <summary>
/// Gets the sum of a rectangular feature in an integral image.
/// </summary>
public static float GetSum(ref HaarRectangle rect, IImage2DFloatA integralImage, int x, int y)
{
return integralImage.GetIntegralSum(x + rect.ScaledX, y + rect.ScaledY, rect.ScaledWidth, rect.ScaledHeight) * rect.ScaledWeight;
}
