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   源码介绍

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Threading.Tasks;

namespace WebApplication2.FaceAI
{
    public class FaceAttr
    {
        [DllImport("BaiduFaceApi.dll", EntryPoint = "face_attr", CharSet = CharSet.Ansi
           , CallingConvention = CallingConvention.Cdecl)]
        private static extern IntPtr face_attr(string file_name);
        [DllImport("BaiduFaceApi.dll", EntryPoint = "face_attr_by_buf", CharSet = CharSet.Ansi
            , CallingConvention = CallingConvention.Cdecl)]
        private static extern IntPtr face_attr_by_buf(byte[] buf, int size);
        [DllImport("BaiduFaceApi.dll", EntryPoint = "face_attr_by_mat", CharSet = CharSet.Ansi
            , CallingConvention = CallingConvention.Cdecl)]
        private static extern IntPtr face_attr_by_mat(IntPtr mat);
        [DllImport("BaiduFaceApi.dll", EntryPoint = "face_attr_by_face", CharSet = CharSet.Ansi
            , CallingConvention = CallingConvention.Cdecl)]
        public static extern IntPtr face_attr_by_face(IntPtr mat, ref TrackFaceInfo info);
        public string test_get_face_attr()
        {
            // 传入图片文件绝对路径
            IntPtr ptr = face_attr("d:\\2.jpg");
            string buf = Marshal.PtrToStringAnsi(ptr);
            return buf;
        }
    }
}