/// <summary>
        /// “选择识别图片”按钮事件
        /// </summary>
        private void ChooseImg(object sender, EventArgs e)
        {
            lblCompareInfo.Text = "";
            if (pEngine == IntPtr.Zero)
            {
                chooseMultiImgBtn.Enabled = false;
                matchBtn.Enabled          = false;
                btnClearFaceList.Enabled  = false;
                chooseImgBtn.Enabled      = false;
                MessageBox.Show("请先初始化引擎!");
                return;
            }
            OpenFileDialog openFileDialog = new OpenFileDialog();

            openFileDialog.Title       = "选择图片";
            openFileDialog.Filter      = "图片文件|*.bmp;*.jpg;*.jpeg;*.png";
            openFileDialog.Multiselect = false;
            openFileDialog.FileName    = string.Empty;
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                DateTime detectStartTime = DateTime.Now;
                AppendText(string.Format("------------------------------开始检测,时间:{0}------------------------------\n", detectStartTime.ToString("yyyy-MM-dd HH:mm:ss:ms")));
                image1Path = openFileDialog.FileName;

                //获取文件,拒绝过大的图片
                FileInfo fileInfo = new FileInfo(image1Path);
                long     maxSize  = 1024 * 1024 * 2;
                if (fileInfo.Length > maxSize)
                {
                    MessageBox.Show("图像文件最大为2MB,请压缩后再导入!");
                    AppendText(string.Format("------------------------------检测结束,时间:{0}------------------------------\n", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:ms")));
                    AppendText("\n");
                    return;
                }

                Image srcImage = Image.FromFile(image1Path);
                //调整图像宽度,需要宽度为4的倍数
                srcImage = ImageUtil.ScaleImage(srcImage, picImageCompare.Width, picImageCompare.Height);
                //调整图片数据,非常重要
                ImageInfo imageInfo = ImageUtil.ReadBMP(srcImage);
                //人脸检测
                ASF_MultiFaceInfo multiFaceInfo = FaceUtil.DetectFace(pEngine, imageInfo);
                //年龄检测
                int         retCode_Age = -1;
                ASF_AgeInfo ageInfo     = FaceUtil.AgeEstimation(pEngine, imageInfo, multiFaceInfo, out retCode_Age);
                //性别检测
                int            retCode_Gender = -1;
                ASF_GenderInfo genderInfo     = FaceUtil.GenderEstimation(pEngine, imageInfo, multiFaceInfo, out retCode_Gender);

                //3DAngle检测
                int             retCode_3DAngle = -1;
                ASF_Face3DAngle face3DAngleInfo = FaceUtil.Face3DAngleDetection(pEngine, imageInfo, multiFaceInfo, out retCode_3DAngle);

                MemoryUtil.Free(imageInfo.imgData);

                if (multiFaceInfo.faceNum < 1)
                {
                    image1Feature         = IntPtr.Zero;
                    picImageCompare.Image = srcImage;
                    AppendText(string.Format("{0} - 未检测出人脸!\n\n", DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss")));
                    AppendText(string.Format("------------------------------检测结束,时间:{0}------------------------------\n", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:ms")));
                    AppendText("\n");
                    return;
                }

                MRECT temp       = new MRECT();
                int   ageTemp    = 0;
                int   genderTemp = 0;
                int   rectTemp   = 0;

                //标记出检测到的人脸
                for (int i = 0; i < multiFaceInfo.faceNum; i++)
                {
                    MRECT rect   = MemoryUtil.PtrToStructure <MRECT>(multiFaceInfo.faceRects + MemoryUtil.SizeOf <MRECT>() * i);
                    int   orient = MemoryUtil.PtrToStructure <int>(multiFaceInfo.faceOrients + MemoryUtil.SizeOf <int>() * i);
                    int   age    = 0;

                    if (retCode_Age != 0)
                    {
                        AppendText(string.Format("年龄检测失败,返回{0}!\n\n", retCode_Age));
                    }
                    else
                    {
                        age = MemoryUtil.PtrToStructure <int>(ageInfo.ageArray + MemoryUtil.SizeOf <int>() * i);
                    }

                    int gender = -1;
                    if (retCode_Gender != 0)
                    {
                        AppendText(string.Format("性别检测失败,返回{0}!\n\n", retCode_Gender));
                    }
                    else
                    {
                        gender = MemoryUtil.PtrToStructure <int>(genderInfo.genderArray + MemoryUtil.SizeOf <int>() * i);
                    }


                    int   face3DStatus = -1;
                    float roll         = 0f;
                    float pitch        = 0f;
                    float yaw          = 0f;
                    if (retCode_3DAngle != 0)
                    {
                        AppendText(string.Format("3DAngle检测失败,返回{0}!\n\n", retCode_3DAngle));
                    }
                    else
                    {
                        //角度状态 非0表示人脸不可信
                        face3DStatus = MemoryUtil.PtrToStructure <int>(face3DAngleInfo.status + MemoryUtil.SizeOf <int>() * i);
                        //roll为侧倾角,pitch为俯仰角,yaw为偏航角
                        roll  = MemoryUtil.PtrToStructure <float>(face3DAngleInfo.roll + MemoryUtil.SizeOf <float>() * i);
                        pitch = MemoryUtil.PtrToStructure <float>(face3DAngleInfo.pitch + MemoryUtil.SizeOf <float>() * i);
                        yaw   = MemoryUtil.PtrToStructure <float>(face3DAngleInfo.yaw + MemoryUtil.SizeOf <float>() * i);
                    }


                    int rectWidth  = rect.right - rect.left;
                    int rectHeight = rect.bottom - rect.top;

                    //查找最大人脸
                    if (rectWidth * rectHeight > rectTemp)
                    {
                        rectTemp   = rectWidth * rectHeight;
                        temp       = rect;
                        ageTemp    = age;
                        genderTemp = gender;
                    }

                    //srcImage = ImageUtil.MarkRectAndString(srcImage, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, age, gender);
                    AppendText(string.Format("{0} - 人脸坐标:[left:{1},top:{2},right:{3},bottom:{4},orient:{5},roll:{6},pitch:{7},yaw:{8},status:{11}] Age:{9} Gender:{10}\n", DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"), rect.left, rect.top, rect.right, rect.bottom, orient, roll, pitch, yaw, age, (gender >= 0 ? gender.ToString() : ""), face3DStatus));
                }

                srcImage = ImageUtil.MarkRectAndString(srcImage, temp.left, temp.top, temp.right - temp.left, temp.bottom - temp.top, ageTemp, genderTemp);


                AppendText(string.Format("{0} - 人脸数量:{1}\n\n", DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"), multiFaceInfo.faceNum));

                //显示标记后的图像
                picImageCompare.Image = srcImage;
                DateTime detectEndTime = DateTime.Now;
                AppendText(string.Format("------------------------------检测结束,时间:{0}------------------------------\n", detectEndTime.ToString("yyyy-MM-dd HH:mm:ss:ms")));
                AppendText("\n");
                ASF_SingleFaceInfo singleFaceInfo = new ASF_SingleFaceInfo();
                //提取人脸特征
                image1Feature = FaceUtil.ExtractFeature(pEngine, srcImage, out singleFaceInfo);

                //清空上次的匹配结果
                for (int i = 0; i < imagesFeatureList.Count; i++)
                {
                    imageList.Items[i].Text = string.Format("{0}号", i);
                }
            }
        }