如何在C#中比较两个图像？

using System;
using System.Drawing;

public class ImageComparer
{
    public static double CompareImages(string imagePath1, string imagePath2)
    {
        Bitmap image1 = new Bitmap(imagePath1);
        Bitmap image2 = new Bitmap(imagePath2);

        int width = Math.Min(image1.Width, image2.Width);
        int height = Math.Min(image1.Height, image2.Height);

        double totalDiff = 0;

        for (int y = 0; y < height; y++)
        {
            for (int x = 0; x < width; x++)
            {
                Color color1 = image1.GetPixel(x, y);
                Color color2 = image2.GetPixel(x, y);

                int diffR = Math.Abs(color1.R - color2.R);
                int diffG = Math.Abs(color1.G - color2.G);
                int diffB = Math.Abs(color1.B - color2.B);

                double pixelDiff = (diffR + diffG + diffB) / 3.0;
                totalDiff += pixelDiff;
            }
        }

        double similarity = 1 - (totalDiff / (width * height * 255));

        return similarity;
    }
}

string imagePath1 = "image1.jpg";
string imagePath2 = "image2.jpg";

double similarity = ImageComparer.CompareImages(imagePath1, imagePath2);
Console.WriteLine("图像相似度：{0}", similarity);