HHow to process image to enhance barcode reading performance in C#?

Bitmap bitmap = new Bitmap("C:\\input\\sample-image.png");
using (ImageProcessor obj = ImageProcessor.FromBitmap(bitmap))
{
    // To apply one or more imaging processes here. 
    obj.Bilevel(128);
    Bitmap result = obj.GetResult();
}

// Read an image
public static ImageProcessor FromFile(String imageFilePath)
public static ImageProcessor FromStream(Stream imageStream)
public static ImageProcessor FromBitmap(Bitmap bitmap)

// Get the processed image
public Bitmap GetResult()
public void SaveToStreamAsPNG(Stream stream)
public void SaveToFileAsPNG(String filePath)

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    obj.Grayscale(GrayscaleMethod.Average); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    obj.Negate(); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    float gamma = 0.8F; 
    obj.Gamma(gamma); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    float gammaRed = 1.0F;
    float gammaGreen = 2.0F; 
    float gammaBlue = 1.0F; 
    obj.Gamma(gammaRed, gammaGreen, gammaBlue); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    float brightness = -50F; 
    float contrast = 0F; 
    obj.BrightnessContrast(brightness, contrast); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    obj.Equalize(); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png"));
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    int width = 10; 
    int height = 10; 
    obj.AdaptiveThreshold(width, height, 0); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    int threshold = 128; 
    obj.Bilevel(threshold); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    float radius = 6; 
    float sigma = 2; 
    obj.GaussianBlur(radius, sigma); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    float radius = 6; 
    float sigma = 2; 
    obj.AdaptiveBlur(radius, sigma); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    float radius = 12; 
    float sigma = 4; 
    float threshold = 80; 
    obj.SelectiveBlur(radius, sigma, threshold); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    float radius = 0; 
    float sigma = 2; 
    obj.Sharpen(radius, sigma); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    float radius = 0; 
    float sigma = 1; 
    float amount = 1; 
    float threshold = 0; 
    obj.UnsharpMask(radius, sigma, amount, threshold); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    obj.Despeckle();
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    int radius = 5; 
    obj.Edge(radius); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    obj.Erode(); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}

using (ImageProcessor obj = ImageProcessor.FromFile(Path.Combine(Root, "Source.png"))) 
{ 
    obj.Dilate(); 
    obj.SaveToFileAsPNG(Path.Combine(Root, "Result.png")); 
}