public BinarizationMethods()
{
const int Size = 61;
using (var imgSrc = new IplImage(FilePath.Image.Binarization, LoadMode.GrayScale))
using (var imgGauss = imgSrc.Clone())
using (var imgNiblack = new IplImage(imgSrc.Size, BitDepth.U8, 1))
using (var imgSauvola = new IplImage(imgSrc.Size, BitDepth.U8, 1))
using (var imgBernsen = new IplImage(imgSrc.Size, BitDepth.U8, 1))
using (var imgNick = new IplImage(imgSrc.Size, BitDepth.U8, 1))
{
//Cv.Smooth(imgSrc, imgGauss, SmoothType.Gaussian, 9);
//Cv.EqualizeHist(imgGauss, imgGauss);
Stopwatch sw = Stopwatch.StartNew();
{
const double K = -0.2;
Binarizer.NiblackFast(imgGauss, imgNiblack, Size, K);
}
Console.WriteLine("Niblack: {0}ms", sw.ElapsedMilliseconds);
sw.Reset(); sw.Start();
{
const double K = 0.2;
const double R = 64;
Binarizer.SauvolaFast(imgGauss, imgSauvola, Size, K, R);
}
Console.WriteLine("Sauvola: {0}ms", sw.ElapsedMilliseconds);
sw.Reset(); sw.Start();
{
const byte ContrastMin = 15;
const byte BgThreshold = 127;
Binarizer.Bernsen(imgGauss, imgBernsen, Size, ContrastMin, BgThreshold);
}
Console.WriteLine("bernsen: {0}ms", sw.ElapsedMilliseconds);
sw.Reset(); sw.Start();
{
const double K = -0.14;
Binarizer.Nick(imgGauss, imgNick, Size, K);
}
Console.WriteLine("nick: {0}ms", sw.ElapsedMilliseconds);
using (new CvWindow("src", imgSrc))
//using (new CvWindow("gauss", imgGauss))
using (new CvWindow("niblack", imgNiblack))
using (new CvWindow("sauvola", imgSauvola))
using (new CvWindow("bernsen", imgBernsen))
using (new CvWindow("nick", imgNick))
{
Cv.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();
Binarizer.Niblack(src, niblack, kernelSize, -0.2);
sw.Stop();
Console.WriteLine($"Niblack {sw.ElapsedMilliseconds} ms");
sw.Restart();
Binarizer.Sauvola(src, sauvola, kernelSize, 0.1, 64);
sw.Stop();
Console.WriteLine($"Sauvola {sw.ElapsedMilliseconds} ms");
sw.Restart();
Binarizer.Bernsen(src, bernsen, kernelSize, 50, 200);
sw.Stop();
Console.WriteLine($"Bernsen {sw.ElapsedMilliseconds} ms");
sw.Restart();
Binarizer.Nick(src, nick, kernelSize, -0.14);
sw.Stop();
Console.WriteLine($"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();
}
}
}