c# 阿宝色 美颜滤镜

根据提供的引用内容，Face++提供了人像美颜API，可以通过API实现美颜滤镜。以下是使用C#调用Face++人像美颜API的示例代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;

namespace FacePPDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            string url = "https://api-cn.faceplusplus.com/facepp/v2/beautify";
            string api_key = "Your API Key";
            string api_secret = "Your API Secret";
            string image_url = "Your Image URL";
            string whitening = "50";
            string smoothing = "50";
            string thinface = "50";
            string shrinkface = "50";
            string enlargeeye = "50";
            string removeeyebag = "50";
            string removepouch = "50";
            string smile = "50";
            string gender = "50";
            string age = "50";
            string output_file = "output.jpg";

            string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.ContentType = "multipart/form-data; boundary=" + boundary;
            request.Method = "POST";
            request.KeepAlive = true;
            request.Credentials = System.Net.CredentialCache.DefaultCredentials;

            Stream memStream = new System.IO.MemoryStream();

            byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
            byte[] endbytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--");

            string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
            string formitem = string.Format(formdataTemplate, "api_key", api_key);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "api_secret", api_secret);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "image_url", image_url);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "whitening", whitening);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "smoothing", smoothing);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "thinface", thinface);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "shrinkface", shrinkface);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "enlargeeye", enlargeeye);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "removeeyebag", removeeyebag);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "removepouch", removepouch);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "smile", smile);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "gender", gender);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            formitem = string.Format(formdataTemplate, "age", age);
            memStream.Write(boundarybytes, 0, boundarybytes.Length);
            formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
            memStream.Write(formitembytes, 0, formitembytes.Length);

            memStream.Write(endbytes, 0, endbytes.Length);

            request.ContentLength = memStream.Length;
            Stream requestStream = request.GetRequestStream();

            memStream.Position = 0;
            byte[] tempBuffer = new byte[memStream.Length];
            memStream.Read(tempBuffer, 0, tempBuffer.Length);
            memStream.Close();
            requestStream.Write(tempBuffer, 0, tempBuffer.Length);
            requestStream.Close();

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream stream = response.GetResponseStream();
            Image image = Image.FromStream(stream);
            image.Save(output_file);
            stream.Close();
            response.Close();
        }
    }
}

以上代码中，需要替换的参数包括：api_key、api_secret、image_url、whitening、smoothing、thinface、shrinkface、enlargeeye、removeeyebag、removepouch、smile、gender、age和output_file。其中，api_key和api_secret是Face++提供的API Key和API Secret，image_url是待处理的图片URL，whitening、smoothing、thinface、shrinkface、enlargeeye、removeeyebag、removepouch、smile、gender和age是美颜参数，output_file是处理后的图片保存路径。