How to Compare Images in C#. For more information, please follow link: https://kb.conholdate.com/total/net/how-to-compare-images-in-csharp

how-to-compare-images-in-csharp.cs

using System;
using GroupDocs.Comparison;

namespace CompareImagesInCSharp
{
    class Program
    {
        public static void Main(string[] args) // Main function to compare Images using C#
        {            
            // Remove the watermark in output Image document by adding license
            string licensePath = "/path/to/GroupDocs.Comparison.lic";
            GroupDocs.Comparison.License lic = new GroupDocs.Comparison.License();
            lic.SetLicense(licensePath);

            using (Comparer comparer = new Comparer("/path/to/source.png"))
            {
                comparer.Add("/path/to/target.png");
                comparer.Compare("/path/to/compare-result.png");
            }       
            Console.WriteLine("Done");
        }
    }
}