/// <summary>
/// 比对函数，将每一帧抓拍的照片和目标人物照片进行比对
/// </summary>
/// <param name="bitmap"></param>
/// <param name="e"></param>
/// <returns></returns>
private void CompareImgWithIDImg(Bitmap bitmap, PaintEventArgs e)
{
if (bitmap != null)
{
//保证只检测一帧，防止页面卡顿以及出现其他内存被占用情况
if (isLock == false)
{
isLock = true;
Graphics g = e.Graphics;
float offsetX = (pic_Video.Width * 1f / bitmap.Width);
float offsetY = (pic_Video.Height * 1f / bitmap.Height);
//根据Bitmap 获取人脸信息列表
List <FaceInfoModel> list = FaceUtil.GetFaceInfos(pImageEngine, bitmap);
foreach (FaceInfoModel sface in list)
{
//异步处理提取特征值和比对，不然页面会比较卡
ThreadPool.QueueUserWorkItem(new WaitCallback(delegate
{
try
{
//提取人脸特征
float similarity = CompareTwoFeatures(sface.feature, imageTemp);
if (similarity > threshold)
{
this.pic_cutImg.Image = bitmap;
this.Invoke((Action)(() =>
{
this.lbl_simiValue.Text = similarity.ToString();
}));
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}));
MRECT rect = sface.faceRect;
float x = rect.left * offsetX;
float width = rect.right * offsetX - x;
float y = rect.top * offsetY;
float height = rect.bottom * offsetY - y;
//根据Rect进行画框
g.DrawRectangle(pen, x, y, width, height);
trackUnit.message = "年龄：" + sface.age.ToString() + "\r\n" + "性别：" + (sface.gender == 0 ? "男" : "女");
g.DrawString(trackUnit.message, font, brush, x, y + 5);
}
isLock = false;
}
}
}