public void WeightedMedianFilter()
{
using var src = Image("lenna.png", ImreadModes.Grayscale);
using var dst = new Mat();
CvXImgProc.WeightedMedianFilter(src, src, dst, 7);
ShowImagesWhenDebugMode(dst);
}
public void Thinning()
{
using var src = Image("blob/shapes2.png", ImreadModes.Grayscale);
using var dst = new Mat();
CvXImgProc.Thinning(src, dst, ThinningTypes.ZHANGSUEN);
ShowImagesWhenDebugMode(src, dst);
}
public void AnisotropicDiffusion()
{
using var src = Image("blob/shapes2.png", ImreadModes.Color);
using var dst = new Mat();
CvXImgProc.AnisotropicDiffusion(src, dst, 1, 1, 1);
ShowImagesWhenDebugMode(src, dst);
}
public void Niblack(LocalBinarizationMethods method)
{
using var src = Image("mandrill.png", ImreadModes.Grayscale);
using var dst = new Mat();
CvXImgProc.NiblackThreshold(src, dst, 255, ThresholdTypes.Binary, 5, 0.5, method);
ShowImagesWhenDebugMode(dst);
}
public void EdgePreservingFilter()
{
using var src = Image("lenna.png", ImreadModes.Color);
using var dst = new Mat();
CvXImgProc.EdgePreservingFilter(src, dst, 7, 10.0);
ShowImagesWhenDebugMode(src, dst);
}
public void PeiLinNormalization()
{
using var src = Image("peilin_plane.png", ImreadModes.Grayscale);
using var tMat = src.Clone();
CvXImgProc.PeiLinNormalization(src, tMat);
var tArray = CvXImgProc.PeiLinNormalization(src);
Assert.Equal(MatType.CV_64FC1, tMat.Type());
Assert.Equal(2, tMat.Rows);
Assert.Equal(3, tMat.Cols);
Assert.Equal(2, tArray.GetLength(0));
Assert.Equal(3, tArray.GetLength(1));
for (int r = 0; r < 2; r++)
{
for (int c = 0; c < 3; c++)
{
Assert.Equal(tArray[r, c], tMat.At <double>(r, c));
}
}
if (Debugger.IsAttached)
{
using var warped = new Mat();
Cv2.WarpAffine(src, warped, tMat, src.Size());
Window.ShowImages(src, warped);
}
}
public override void RunTest()
{
using var src = Cv2.ImRead(ImagePath.Binarization, ImreadModes.Grayscale);
using var niblack = new Mat();
using var sauvola = new Mat();
using var nick = new Mat();
int kernelSize = 51;
var sw = new Stopwatch();
sw.Start();
CvXImgProc.NiblackThreshold(src, niblack, 255, ThresholdTypes.Binary, kernelSize, -0.2, LocalBinarizationMethods.Niblack);
sw.Stop();
Console.WriteLine($"Niblack {sw.ElapsedMilliseconds} ms");
sw.Restart();
CvXImgProc.NiblackThreshold(src, sauvola, 255, ThresholdTypes.Binary, kernelSize, 0.1, LocalBinarizationMethods.Sauvola);
sw.Stop();
Console.WriteLine($"Sauvola {sw.ElapsedMilliseconds} ms");
sw.Restart();
CvXImgProc.NiblackThreshold(src, nick, 255, ThresholdTypes.Binary, kernelSize, -0.14, LocalBinarizationMethods.Nick);
sw.Stop();
Console.WriteLine($"Nick {sw.ElapsedMilliseconds} ms");
using (new Window("src", src, WindowFlags.AutoSize))
using (new Window("Niblack", niblack, WindowFlags.AutoSize))
using (new Window("Sauvola", sauvola, WindowFlags.AutoSize))
using (new Window("Nick", nick, WindowFlags.AutoSize))
{
Cv2.WaitKey();
}
}
public void BrightEdges()
{
using var src = Image("lenna.png", ImreadModes.Color);
using var dst = new Mat();
CvXImgProc.BrightEdges(src, dst);
ShowImagesWhenDebugMode(src, dst);
}
public void CreateAndDispose2()
{
using (var eb = CvXImgProc.CreateEdgeBoxes())
{
GC.KeepAlive(eb);
}
}
public void Run()
{
using var src = Cv2.ImRead(@"G:\其他项目\YuZe.ColoredPencil\YuZe.ColoredPencil\P10424-172645.jpg", ImreadModes.Grayscale);
using var niblack = new Mat();
using var sauvola = new Mat();
using var bernsen = new Mat();
using var nick = new Mat();
int kernelSize = 51;
var sw = new Stopwatch();
sw.Start();
CvXImgProc.NiblackThreshold(src, niblack, 255, ThresholdTypes.Binary, kernelSize, -0.2, LocalBinarizationMethods.Niblack);
sw.Stop();
Console.WriteLine($"Niblack {sw.ElapsedMilliseconds} ms");
sw.Restart();
CvXImgProc.NiblackThreshold(src, sauvola, 255, ThresholdTypes.Binary, kernelSize, 0.1, LocalBinarizationMethods.Sauvola);
sw.Stop();
Console.WriteLine($"Sauvola {sw.ElapsedMilliseconds} ms");
sw.Restart();
CvXImgProc.NiblackThreshold(src, nick, 255, ThresholdTypes.Binary, kernelSize, -0.14, LocalBinarizationMethods.Nick);
sw.Stop();
Console.WriteLine($"Nick {sw.ElapsedMilliseconds} ms");
using (new Window("src", src, WindowFlags.Normal))
using (new Window("Niblack", niblack, WindowFlags.Normal))
using (new Window("Sauvola", sauvola, WindowFlags.Normal))
using (new Window("Nick", nick, WindowFlags.Normal))
{
Cv2.WaitKey();
}
}
public void GradientDeriche()
{
using var src = Image("lenna.png", ImreadModes.Color);
using var dstX = new Mat();
using var dstY = new Mat();
CvXImgProc.GradientDericheX(src, dstX, 10.0, 10.0);
CvXImgProc.GradientDericheX(src, dstY, 10.0, 10.0);
ShowImagesWhenDebugMode(src, dstX, dstY);
}
public void Niblack()
{
using (var src = Image("lenna.png", ImreadModes.GrayScale))
using (var dst = new Mat())
{
CvXImgProc.NiblackThreshold(src, dst, 255, ThresholdTypes.Binary, 5, 0.5);
ShowImagesWhenDebugMode(dst);
}
}
public void CovarianceEstimation()
{
const int windowSize = 7;
using var src = Image("lenna.png", ImreadModes.Grayscale);
using var dst = new Mat();
CvXImgProc.CovarianceEstimation(src, dst, windowSize, windowSize);
// TODO
Assert.Equal(windowSize * windowSize, dst.Rows);
Assert.Equal(windowSize * windowSize, dst.Cols);
Assert.Equal(MatType.CV_32FC2, dst.Type());
}
public void CovarianceEstimation()
{
const int windowSize = 7;
using (var src = Image("lenna.png", ImreadModes.GrayScale))
using (var dst = new Mat())
{
CvXImgProc.CovarianceEstimation(src, dst, windowSize, windowSize);
// TODO
Assert.That(dst.Rows, Is.EqualTo(windowSize * windowSize));
Assert.That(dst.Cols, Is.EqualTo(windowSize * windowSize));
Assert.That(dst.Type(), Is.EqualTo(MatType.CV_32FC2));
}
}
public void Sauvola()
{
foreach (var r in new double[] { 16, 32, 64, 128 })
{
using var src = Image("mandrill.png", ImreadModes.Grayscale);
using var dst = new Mat();
CvXImgProc.NiblackThreshold(
src, dst,
255,
ThresholdTypes.Binary,
5, 0.5,
LocalBinarizationMethods.Sauvola,
r);
ShowImagesWhenDebugMode(new[] { dst }, new[] { $"r={r}" });
}
}
public void ColorMatchTemplate()
{
using var src = Image("lenna.png", ImreadModes.Color);
using var template = src[new Rect(200, 230, 150, 150)];
using var dst = new Mat();
CvXImgProc.ColorMatchTemplate(src, template, dst);
Assert.False(dst.Empty());
Assert.Equal(MatType.CV_64FC1, dst.Type());
dst.MinMaxLoc(out var minVal, out var maxVal, out var minLoc, out var maxLoc);
using var view = src.Clone();
view.Rectangle(maxLoc, new Point(maxLoc.X + template.Width, maxLoc.Y + template.Height), Scalar.Red, 3);
ShowImagesWhenDebugMode(view, template);
}
public void FastHoughTransform()
{
using (var image = Image("building.jpg", ImreadModes.Grayscale))
using (var fht = new Mat())
{
CvXImgProc.FastHoughTransform(image, fht, MatType.CV_32SC1);
Cv2.MinMaxLoc(fht, out var minv, out double maxv);
Mat ucharFht = new Mat();
fht.ConvertTo(ucharFht, MatType.CV_8UC1,
255.0 / (maxv + minv), minv / (maxv + minv));
Rescale(ucharFht, ucharFht);
//Cv2.ImShow("fast hough transform", ucharFht);
//Cv2.WaitKey();
}
public void Run()
{
using var src = Cv2.ImRead(FilePath.Image.Binarization, ImreadModes.Grayscale);
using var niblack = new Mat();
using var sauvola = new Mat();
using var bernsen = new Mat();
using var nick = new Mat();
int kernelSize = 51;
var sw = new Stopwatch();
sw.Start();
CvXImgProc.NiblackThreshold(src, niblack, 255, ThresholdTypes.Binary, kernelSize, -0.2, LocalBinarizationMethods.Niblack);
sw.Stop();
Console.WriteLine($"Niblack {sw.ElapsedMilliseconds} ms");
sw.Restart();
CvXImgProc.NiblackThreshold(src, sauvola, 255, ThresholdTypes.Binary, kernelSize, 0.1, LocalBinarizationMethods.Sauvola);
sw.Stop();
Console.WriteLine($"Sauvola {sw.ElapsedMilliseconds} ms");
sw.Restart();
Binarizer.Bernsen(src, bernsen, kernelSize, 50, 200);
sw.Stop();
Console.WriteLine($"Bernsen {sw.ElapsedMilliseconds} ms");
sw.Restart();
CvXImgProc.NiblackThreshold(src, nick, 255, ThresholdTypes.Binary, kernelSize, -0.14, LocalBinarizationMethods.Nick);
sw.Stop();
Console.WriteLine($"Nick {sw.ElapsedMilliseconds} ms");
using (new Window("src", WindowMode.AutoSize, src))
using (new Window("Niblack", WindowMode.AutoSize, niblack))
using (new Window("Sauvola", WindowMode.AutoSize, sauvola))
using (new Window("Bernsen", WindowMode.AutoSize, bernsen))
using (new Window("Nick", WindowMode.AutoSize, nick))
{
Cv2.WaitKey();
}
}
public static SoftwareBitmap AutoColorEnhancement(SoftwareBitmap Input)
{
using (Mat inputMat = Input.SoftwareBitmapToMat())
using (Mat outputMat = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_8UC4))
using (Mat Temp = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32FC3))
using (Mat Gray = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32FC3))
{
inputMat.ConvertTo(Temp, MatType.CV_32FC3);
Cv2.CvtColor(Temp, Gray, ColorConversionCodes.BGR2GRAY);
Cv2.MinMaxLoc(Gray, out _, out double LwMax);
float LwAver;
int Num;
using (Mat Lw_ = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32FC3))
{
Num = inputMat.Rows * inputMat.Cols;
//计算每个数组元素绝对值的自然对数
Cv2.Log(Gray + 1e-3f, Lw_);
//矩阵自然指数
LwAver = Convert.ToSingle(Math.Exp(Cv2.Sum(Lw_)[0] / Num));
}
using (Mat Lg = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32FC3))
{
Cv2.Log(Gray / LwAver + 1f, Lg);
Cv2.Divide(Lg, Math.Log(LwMax / LwAver + 1f), Lg);
//局部自适应
using (Mat Lout = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32FC3))
{
int kernelSize = Convert.ToInt32(Math.Floor(Convert.ToDouble(Math.Max(3, Math.Max(inputMat.Rows / 100, inputMat.Cols / 100)))));
using (Mat Lp = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32FC3))
{
using (Mat kernel = Cv2.GetStructuringElement(MorphShapes.Rect, new Size(kernelSize, kernelSize)))
{
Cv2.Dilate(Lg, Lp, kernel);
}
using (Mat Hg = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32FC3))
{
CvXImgProc.GuidedFilter(Lg, Lp, Hg, 10, 0.01);
Cv2.MinMaxLoc(Lg, out _, out double LgMax);
using (Mat alpha = 1.0f + Lg * (36 / LgMax))
using (Mat Lg_ = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32FC3))
{
Cv2.Log(Lg + 1e-3f, Lg_);
float beta = 10 * Convert.ToSingle(Math.Exp(Cv2.Sum(Lg_)[0] / Num));
Cv2.Log(Lg / Hg + beta, Lout);
Cv2.Multiply(alpha, Lout, Lout);
Cv2.Normalize(Lout, Lout, 0, 255, NormTypes.MinMax);
}
}
}
using (Mat gain = new Mat(inputMat.Rows, inputMat.Cols, MatType.CV_32F))
{
for (int i = 0; i < inputMat.Rows; i++)
{
for (int j = 0; j < inputMat.Cols; j++)
{
float x = Gray.At <float>(i, j);
float y = Lout.At <float>(i, j);
gain.At <float>(i, j) = 0 == x ? y : y / x;
}
}
Mat[] BGRChannel = Cv2.Split(Temp);
try
{
BGRChannel[0] = (gain.Mul(BGRChannel[0] + Gray) + BGRChannel[0] - Gray) * 0.5f;
BGRChannel[1] = (gain.Mul(BGRChannel[1] + Gray) + BGRChannel[1] - Gray) * 0.5f;
BGRChannel[2] = (gain.Mul(BGRChannel[2] + Gray) + BGRChannel[2] - Gray) * 0.5f;
Cv2.Merge(BGRChannel, Temp);
Temp.ConvertTo(outputMat, MatType.CV_8UC4);
}
finally
{
Array.ForEach(BGRChannel, (Channel) => Channel.Dispose());
}
}
}
}
return(outputMat.MatToSoftwareBitmap());
}
}
public void FHTSample()
{
const string imPath = @"_data\image\building.jpg";
using (var image = new Mat(imPath, ImreadModes.GrayScale))
using (var hough = new Mat())
using (var canny = new Mat())
{
Cv2.Canny(image, canny, 50, 200, 3);
CvXImgProc.FastHoughTransform(canny, hough, MatType.CV_32S /*C1*/, AngleRangeOption.ARO_315_135, HoughOP.FHT_ADD, HoughDeskewOption.DESKEW);
var lines = new List <Vec4i>();
GetLocalExtr(lines, canny, hough, 255f * 0.3f * Math.Min(canny.Rows, canny.Cols), 50);
var cannyColor = new Mat();
Cv2.CvtColor(canny, cannyColor, ColorConversionCodes.GRAY2BGR);
for (var i = 0; i < lines.Count; i++)
{
var line = lines[i];
Cv2.Line(cannyColor, new Point(line.Item0, line.Item1), new Point(line.Item2, line.Item3), Scalar.Red);
}
//cannyColor.SaveImage("cannycolor.png");
ShowImagesWhenDebugMode(image, canny, cannyColor);
}
bool GetLocalExtr(List <Vec4i> lines, Mat src, Mat fht, float minWeight, int maxCount)
{
const int MAX_LEN = 10_000;
var weightedPoints = new List <KeyValuePair <int, Point> >();
for (var y = 0; y < fht.Rows; ++y)
{
if (weightedPoints.Count > MAX_LEN)
{
break;
}
var fhtMat = new MatOfInt(fht);
var fhtIndexer = fhtMat.GetIndexer();
var pLineY = Math.Max(y - 1, 0);
var cLineY = y;
var nLineY = Math.Min(y + 1, fht.Rows - 1);
for (var x = 0; x < fht.Cols; ++x)
{
if (weightedPoints.Count > MAX_LEN)
{
break;
}
var value = fhtIndexer[cLineY, x];
if (value >= minWeight)
{
var isLocalMax = 0;
var start = Math.Max(x - 1, 0);
var end = Math.Min(x + 1, fht.Cols - 1);
for (var xx = start; xx < end; ++xx)
{
var pLine = fhtIndexer[pLineY, xx];
var cLine = fhtIndexer[cLineY, xx];
var nLine = fhtIndexer[nLineY, xx];
if (!incIfGreater(value, pLine, ref isLocalMax) ||
!incIfGreater(value, cLine, ref isLocalMax) ||
!incIfGreater(value, nLine, ref isLocalMax))
{
isLocalMax = 0;
break;
}
}
if (isLocalMax > 0)
{
weightedPoints.Add(new KeyValuePair <int, Point>(value, new Point(x, y)));
}
}
}
}
if (weightedPoints.Count == 0)
{
return(true);
}
// Sort WeightedPoints
weightedPoints = weightedPoints.OrderByDescending(x => x.Key).ToList();
weightedPoints = weightedPoints.Take(maxCount).ToList();
for (var i = 0; i < weightedPoints.Count; i++)
{
lines.Add(CvXImgProc.HoughPoint2Line(weightedPoints[i].Value, src));
}
return(true);
}
bool incIfGreater(int a, int b, ref int value)
{
if (/*value == 0 || */ a < b)
{
return(false);
}
if (a > b)
{
++(value);
}
return(true);
}
}
public void New2()
{
var fld = CvXImgProc.CreateFastLineDetector();
fld.Dispose();
}