Question

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How can I measure the similarity between two images?

how to check if two images are similar, not the same, but similar?

Like color counting or bytes or something equals?

In C#.

I need make a tool that recognize duplicate photos on pc.

thanks.

Answer 1

I agree 100% with @MikeOhlsen’s comment.

That aside, if you really want to get picky, you can load them in to a Bitmap then use GetPixel() and maybe keep track of the % of matches pixels (>= 95% matches are “similar images”, e.g.).

Also, similar post: Compare images in C# .NET