static void TestLevels()
{
var bmp1 = (Bitmap)Bitmap.FromFile("meta1.png");
var bmp2 = (Bitmap)Bitmap.FromFile("meta2.png");
LevelsLinear filter = new LevelsLinear();
// set ranges
filter.Input = new IntRange(150, 255);
// apply the filter
var sw = Stopwatch.StartNew();
filter.ApplyInPlace(bmp2);
sw.Stop();
var contrast = new ContrastStretch();
var bmp4 = contrast.Apply(bmp2);
var bmp3 = ImageUtil.AdjustImage(bmp2, contrast: 2f);
}
public double GetTemperature()
{
var temp = 0.0;
var image = Image.FromFile(filename);
var grayscale = new Grayscale(0.2125, 0.7154, 0.0721);
image = grayscale.Apply(image);
var invert = new Invert();
image = invert.Apply(image);
var stats = new ImageStatistics(image);
var levelsLinear = new LevelsLinear
{
InGray = stats.Gray.GetRange(2.90)
};
image = levelsLinear.Apply(image);
var contrast = new ContrastStretch();
image = contrast.Apply(image);
var erosion = new Erosion();
image = erosion.Apply(image);
var blur = new GaussianBlur(2, 3);
image = blur.Apply(image);
var threshold = new Threshold(79);
image = threshold.Apply(image);
image.Save(processedFileName, System.Drawing.Imaging.ImageFormat.Jpeg);
image.Dispose();
var text = Recognise();
double.TryParse(text.Replace(',', '.'), out temp);
return temp;
}
public static Bitmap ApplyContrastStretch(Bitmap pBitmap)
{
var filter = new ContrastStretch();
return filter.Apply(pBitmap);
}
public BitmapSource Apply(BitmapSource image)
{
var filter = new ContrastStretch();
var bmp = filter.Apply(image.ToBitmap());
return bmp.ToBitmapImage();
}
