determine the number of unique image colors

[samssonn]

How to determine the number of unique image colors? I tried the image.UniqueColors () method; but it returns the number of all colors in the image. And you need to get the number of unique colors.

[dlemstra]

It seems that this question continued here: https://imagemagick.org/discourse-server/viewtopic.php?f=27&t=37711

[samssonn]

Yes, but I never received a normal answer.

[dlemstra]

What do you mean by a normal answer? What kind of information are you missing in the provided answers?

[samssonn]

There is a color image in which there are millions of different colors and shades. I need to get the number of unique colors, that is, those that do not repeat. For example, with the existing million colors and shades, there are repetitions, and there are also those that are not repeated, these are unique colors. How do I get the number of these colors in an image? I need C # code.

[dlemstra]

The UniqueColors method return the unqiue colors. But due to your input image that might be all the colors of the image. Even a tiny different in pixel colors will cause it to detect difference. I don't understand what you are expecting?

[samssonn]

Could you please example code C # How to use the method? It is necessary that the variable has a number of unique colors.

[dlemstra]

The method UniqueColors returns the number of unique colors. And we tried to explain why you think that the result is wrong. But the result of that method is what you are looking for.

[samssonn]

Could you please sample code C #
How to use it?

[dlemstra]

The UniqueColors() method will return an image with the unique number of colors. To get the total you will need to do something like this:

string InputImagePath = @"D:\User\1.jpg";
using (MagickImage image = new MagickImage(InputImagePath))
{
    using (var uniqueColors = image.UniqueColors())
    {
        return uniqueColors.Width; // Each color is one pixel.
    }
}

[FurkanGozukara]

I think image.TotalColors gives unique colors. I tested getting same value always

[samssonn]

Your code returns the width of the image. And I need a number of unique colors.

[dlemstra]

I made a typo it should be uniqueColors.Width instead.

[samssonn]

Thank you so much, you helped me a lot.