Calculate the number of pixels

[sihj2002]

I want to calculate the number of black pixels.

And this is my test code.

        string filepath = "C:/....tif";
        MagickImage img = new MagickImage(filepath);
                    
        img.ColorType = ColorType.Bilevel;

        img.Depth = 1;

        IPixelCollection pixels = img.GetPixels();
                   
        for (int x = 0; x < img.Width; x++)
        {
            for (int y = 0; y < img.Height; y++)
            {
                Console.WriteLine(pixels.GetValue (x,y));
                Console.WriteLine(y);
            }
         }

And this is the result.

I don't know how can I receive the pixel values in integer.
Or is there another method approaching to pixel?
Can you recommend it?

[dlemstra]

Can you share the original tiff image?

[sihj2002]

https://drive.google.com/open?id=1Kyoc_GGwceS6b70TyA1YrpVGVTOWt2TI

Here is tiff image.

[dlemstra]

For this particular image you could use the Histogram method of MagickImage:

using (var image = new MagickImage("test.tif"))
{
    var colors = image.Histogram();
    var blackPixelCount = colors[MagickColors.Black];
}

[sihj2002]

okay thanks I'll try and see.

[sihj2002]

It looks like it's working. I tried to calculate pixels of full black image and result is good.
test_1 's width and height is 11811 x 9449.

Thank you very much.