private static void Rotate(MagickImage output, UnperspectiveRotation rotation)
{
if (rotation != UnperspectiveRotation.None)
{
output.Rotate((int)rotation);
}
}
/// <summary>
/// Automatically remove pespective distortion from an image.
/// </summary>
/// <param name="input">The image to execute the script on.</param>
/// <returns>The resulting image.</returns>
public MagickImage Execute(MagickImage input)
{
if (input == null)
{
throw new ArgumentNullException("input");
}
CheckSettings();
MagickGeometry inputDimensions = new MagickGeometry(input.Width, input.Height);
MagickColor backgroundColor = GetBorderColor(input);
int borderSize = (int)((3 * Blur) + 5);
var output = input.Clone();
MagickGeometry trimmedDimensions = TrimImage(output, backgroundColor, borderSize);
PadImage(output, borderSize);
int xOffset;
using (MagickImage paddedMask = CreatePaddedMask(output, out xOffset))
{
double maxRad = 0.5 * Hypot(output.Width, output.Height);
MagickImage depolar = CreateDepolar(paddedMask, maxRad);
ushort[] pixels = GetGrayChannel(depolar);
List <PixelValue> maxList = GetPeaks(pixels, depolar);
PointD[] corners = GetCorners(paddedMask, maxList, maxRad, xOffset);
UnperspectiveRotation rotation = GetRotation(corners, output);
Distort(output, corners, inputDimensions, trimmedDimensions, backgroundColor);
Rotate(output, rotation);
return(output);
}
}
private static void GetRotation_Geometry10x10_ReturnsCorrectRotation(int x, int y, UnperspectiveRotation expectedRotation)
{
var script = new UnperspectiveScript();
Type type = script.GetType();
MethodInfo method = type.GetMethod("GetRotation", BindingFlags.Instance | BindingFlags.NonPublic);
using (MagickImage image = new MagickImage(MagickColors.Fuchsia, 10, 10))
{
var result = method.Invoke(script, new object[] { new PointD[] { new PointD(x, y) }, image });
Assert.AreEqual(expectedRotation, result);
}
}
