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  • 判断一张图片的颜色数和亮度值

     static void Main(string[] args)
            {
               var di=new DirectoryInfo(@"C:UsersAdministratorDesktoppic");
                foreach (var fi in di.GetFiles())
                {
                    var colorCount = 0;
                    float lightness = 0;
                    GetPicColorCountAndLightness(fi.FullName, out colorCount, out lightness);
                    Console.WriteLine(fi.Name + "     " + colorCount + "      " + lightness);
                }
               Console.ReadKey();
            }
    
            /// <summary>
            /// 功能:输入一个图片的路径,返回这张图片使用的颜色个数和亮度
            /// 作者:黄海
            /// 时间:2018-06-12
            /// </summary>
            /// <param name="picPath"></param>
            /// <param name="colorCount"></param>
            /// <param name="lightNess"></param>
            /// <returns></returns>
            public static void GetPicColorCountAndLightness(string picPath,out int colorCount,out float lightNess)
            {
                var dict=new Dictionary<Color,int>();
                var bmpobj = new Bitmap(picPath);
                float allLightness = 0;
                int count = 0;
                for (var i = 0; i < bmpobj.Height; i++)
                {
                    for (var j = 0; j < bmpobj.Width; j++)
                    {
                        count++;
                        var a=bmpobj.GetPixel(j, i);
                        dict[a] = 1;
    
                        //float hue = a.GetHue();
                        //float saturation = a.GetSaturation();
                        allLightness += a.GetBrightness();
                    }
                }
                colorCount = dict.Count;
                lightNess = allLightness;
            }
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  • 原文地址:https://www.cnblogs.com/littlehb/p/9175176.html
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