/// <summary>
        /// 提取单人脸特征
        /// </summary>
        /// <param name="pEngine">人脸识别引擎</param>
        /// <param name="image">图片</param>
        /// <param name="singleFaceInfo">单人脸信息</param>
        /// <returns>单人脸特征</returns>
        public static IntPtr ExtractFeature(IntPtr pEngine, Image image, ASF_SingleFaceInfo singleFaceInfo)
        {
            ImageInfo imageInfo       = ImageUtil.ReadBMP(image);
            IntPtr    pSingleFaceInfo = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_SingleFaceInfo>());

            MemoryUtil.StructureToPtr(singleFaceInfo, pSingleFaceInfo);

            IntPtr pFaceFeature = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_FaceFeature>());
            int    retCode      = -1;

            try
            {
                retCode = ASFFunctions.ASFFaceFeatureExtract(pEngine, imageInfo.width, imageInfo.height, imageInfo.format, imageInfo.imgData, pSingleFaceInfo, pFaceFeature);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            Console.WriteLine("FR Extract Feature result:" + retCode);

            if (retCode != 0)
            {
                //释放指针
                MemoryUtil.Free(pSingleFaceInfo);
                MemoryUtil.Free(pFaceFeature);
                ASF_FaceFeature emptyFeature  = new ASF_FaceFeature();
                IntPtr          pEmptyFeature = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_FaceFeature>());
                MemoryUtil.StructureToPtr(emptyFeature, pEmptyFeature);
                return(pEmptyFeature);
            }

            //人脸特征feature过滤
            ASF_FaceFeature faceFeature = MemoryUtil.PtrToStructure <ASF_FaceFeature>(pFaceFeature);

            byte[] feature = new byte[faceFeature.featureSize];
            MemoryUtil.Copy(faceFeature.feature, feature, 0, faceFeature.featureSize);

            ASF_FaceFeature localFeature = new ASF_FaceFeature();

            localFeature.feature = MemoryUtil.Malloc(feature.Length);
            MemoryUtil.Copy(feature, 0, localFeature.feature, feature.Length);
            localFeature.featureSize = feature.Length;
            IntPtr pLocalFeature = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_FaceFeature>());

            MemoryUtil.StructureToPtr(localFeature, pLocalFeature);

            //释放指针
            MemoryUtil.Free(pSingleFaceInfo);
            MemoryUtil.Free(pFaceFeature);
            MemoryUtil.Free(imageInfo.imgData);

            return(pLocalFeature);
        }
        /// <summary>
        /// 单人脸性别检测
        /// </summary>
        /// <param name="pEngine">引擎Handle</param>
        /// <param name="image">图片</param>
        /// <param name="singleFaceInfo">单人脸信息</param>
        /// <returns>性别估计结果</returns>
        public static ASF_GenderInfo GenderEstimation(IntPtr pEngine, Image image, ASF_SingleFaceInfo singleFaceInfo)
        {
            ImageInfo         imageInfo     = ImageUtil.ReadBMP(image);
            ASF_MultiFaceInfo multiFaceInfo = new ASF_MultiFaceInfo();

            multiFaceInfo.faceRects = MemoryUtil.Malloc(MemoryUtil.SizeOf <MRECT>());
            MemoryUtil.StructureToPtr <MRECT>(singleFaceInfo.faceRect, multiFaceInfo.faceRects);
            multiFaceInfo.faceOrients = MemoryUtil.Malloc(MemoryUtil.SizeOf <int>());
            MemoryUtil.StructureToPtr <int>(singleFaceInfo.faceOrient, multiFaceInfo.faceOrients);
            multiFaceInfo.faceNum = 1;
            ASF_GenderInfo genderInfo = GenderEstimation(pEngine, imageInfo, multiFaceInfo);

            MemoryUtil.Free(imageInfo.imgData);
            return(genderInfo);
        }
        /// <summary>
        /// 提取人脸特征
        /// </summary>
        /// <param name="pEngine">引擎Handle</param>
        /// <param name="imageInfo">图像数据</param>
        /// <param name="multiFaceInfo">人脸检测结果</param>
        /// <returns>保存人脸特征结构体指针</returns>
        public static IntPtr ExtractFeature(IntPtr pEngine, ImageInfo imageInfo, ASF_MultiFaceInfo multiFaceInfo, out ASF_SingleFaceInfo singleFaceInfo)
        {
            singleFaceInfo            = new ASF_SingleFaceInfo();
            singleFaceInfo.faceRect   = MemoryUtil.PtrToStructure <MRECT>(multiFaceInfo.faceRects);
            singleFaceInfo.faceOrient = MemoryUtil.PtrToStructure <int>(multiFaceInfo.faceOrients);
            IntPtr pSingleFaceInfo = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_SingleFaceInfo>());

            MemoryUtil.StructureToPtr(singleFaceInfo, pSingleFaceInfo);

            IntPtr pFaceFeature = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_FaceFeature>());
            int    retCode      = ASFFunctions.ASFFaceFeatureExtract(pEngine, imageInfo.width, imageInfo.height, imageInfo.format, imageInfo.imgData, pSingleFaceInfo, pFaceFeature);

            Console.WriteLine("FR Extract Feature result:" + retCode);

            if (retCode != 0)
            {
                //释放指针
                MemoryUtil.Free(pSingleFaceInfo);
                MemoryUtil.Free(pFaceFeature);
                ASF_FaceFeature emptyFeature  = new ASF_FaceFeature();
                IntPtr          pEmptyFeature = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_FaceFeature>());
                MemoryUtil.StructureToPtr(emptyFeature, pEmptyFeature);
                return(pEmptyFeature);
            }

            //人脸特征feature过滤
            ASF_FaceFeature faceFeature = MemoryUtil.PtrToStructure <ASF_FaceFeature>(pFaceFeature);

            byte[] feature = new byte[faceFeature.featureSize];
            MemoryUtil.Copy(faceFeature.feature, feature, 0, faceFeature.featureSize);

            ASF_FaceFeature localFeature = new ASF_FaceFeature();

            localFeature.feature = MemoryUtil.Malloc(feature.Length);
            MemoryUtil.Copy(feature, 0, localFeature.feature, feature.Length);
            localFeature.featureSize = feature.Length;
            IntPtr pLocalFeature = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_FaceFeature>());

            MemoryUtil.StructureToPtr(localFeature, pLocalFeature);

            //释放指针
            MemoryUtil.Free(pSingleFaceInfo);
            MemoryUtil.Free(pFaceFeature);

            return(pLocalFeature);
        }