private async Task UpdateFace()
{
using (var db = new attendance_sysEntities())
{
int i = 0;
while (t_Faces.Count > 0)
{
t_face tempFace = t_Faces.Dequeue();
//从数据库中查询是否有该stduentid的特征记录
var sqface = db.t_face.Where(face => face.studnet_id == tempFace.studnet_id).FirstOrDefault();
int records = 0;
//如果数据库中有该同学的人脸特征记录
if (sqface != null)
{
//直接更新该记录
sqface.face_feature = tempFace.face_feature;
sqface.face_feature_length = tempFace.face_feature_length;
sqface.image_path = "";
}
else
{
tempFace.image_path = "";
//如果没有记录，则插入一条
db.t_face.Add(tempFace);
}
records = await db.SaveChangesAsync();
Invoke(new Action(() =>
{
if (records > 0)
{
listViewFaceDetal.Items[i].SubItems[0].Text = "正确";
listViewFaceDetal.Items[i].SubItems[0].ForeColor = Color.Green;
listViewFaceDetal.Items[i].SubItems[2].Text = "更新完成";
}
else
{
listViewFaceDetal.Items[i].SubItems[0].Text = "错误";
listViewFaceDetal.Items[i].SubItems[0].ForeColor = Color.Red;
listViewFaceDetal.Items[i].SubItems[2].Text = "无法对数据库做修改操作";
}
listViewFaceDetal.Refresh();
}));
i++;
}
}
}
public StudentFaceFeature(t_face dbFace)
{
studentId = dbFace.studnet_id;
faceFeature = new ASF_FaceFeature();
faceFeature.featureSize = (int)dbFace.face_feature_length;
if (faceFeature.featureSize == dbFace.face_feature.Length)
{
faceFeature.feature = MemoryUtil.Malloc(faceFeature.featureSize);
MemoryUtil.Copy(dbFace.face_feature, 0, faceFeature.feature, faceFeature.featureSize);
pFaceFeature = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_FaceFeature>());
MemoryUtil.StructureToPtr <ASF_FaceFeature>(faceFeature, pFaceFeature);
}
else
{
pFaceFeature = IntPtr.Zero;
faceFeature.feature = IntPtr.Zero;
faceFeature.featureSize = 0;
}
}
private void buttonSelectImage_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Title = "选择图片";
openFileDialog.Filter = "图片文件|*.bmp;*.jpg;*.jpeg;*.png";
openFileDialog.Multiselect = true;
openFileDialog.FileName = string.Empty;
ImageListView.Refresh();
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
string[] fileNames = openFileDialog.FileNames;
for (int i = 0; i < fileNames.Length; i++)
{
if (checkImage(fileNames[i]))
{
t_face temp_face = new t_face();
temp_face.image_path = fileNames[i];
FileInfo fileInfo = new FileInfo(fileNames[i]);
temp_face.studnet_id = fileInfo.Name.Split('.')[0];
if (getFaceFeature(ref temp_face))
{
t_Faces.Enqueue(temp_face);
}
else
{
LoggerService.logger.Error($"学生{fileNames}的人脸无法提取特征!");
}
}
}
}
if (t_Faces.Count > 0)
{
buttonUpdateFace.Enabled = true;
}
}
private bool getFaceFeature(ref t_face t_Face)
{
Image image = ImageUtil.readFromFile(t_Face.image_path);
bool result = false;
//压缩图片的长宽为临界大小1536
if (image.Width > 1536 || image.Height > 1536)
{
image = ImageUtil.ScaleImage(image, 1536, 1536);
}
//裁剪，因为虹软要求图片宽度要是4的整数倍，所以要检测一下，如果不是就把宽缩小为4的倍数
if (image.Width % 4 != 0)
{
image = ImageUtil.ScaleImage(image, image.Width - (image.Width % 4), image.Height);
}
//把image对象转化为位图的对象
Bitmap bitmap = new Bitmap(image);
//使用人脸检测引擎去检测人脸，返回的lis列表里存了人脸的位置
List <FaceInfo> faceInfos = faceImageRecognizer.ScanFaces(bitmap);
//判断一张照片是否就一个人脸
if (faceInfos.Count == 1)
{
//把第一个人脸的信息传入人脸识别引擎中，提取出特征的结构体指引到faceinfo中，返回是否成功
int num = faceImageRecognizer.ScanFaceFeature(bitmap, faceInfos[0]);
if (num == 0)
{
ASF_SingleFaceInfo singleFaceInfo = faceInfos[0].singleFaceInfo;
//t_face就是实体类映射对象
t_Face.face_feature_length = faceInfos[0].faceFeature.featureSize;
t_Face.face_feature = new byte[(int)t_Face.face_feature_length];
//把结构体里的特征纯copy到t_face中
MemoryUtil.Copy(faceInfos[0].faceFeature.feature, t_Face.face_feature, 0, faceInfos[0].faceFeature.featureSize);
result = true;
LoggerService.logger.Info(string.Format("已提取人脸特征值，[left:{0},right:{1},top:{2},bottom:{3},orient:{4}]", singleFaceInfo.faceRect.left, singleFaceInfo.faceRect.right, singleFaceInfo.faceRect.top, singleFaceInfo.faceRect.bottom, singleFaceInfo.faceOrient));
string tempImagePath = t_Face.image_path;
string id = t_Face.studnet_id;
//裁剪出头像，依次展示在界面，多线程操作，解决可能异常越界问题
Invoke(new Action(() => {
image = ImageUtil.CutImage(image, singleFaceInfo.faceRect.left, singleFaceInfo.faceRect.top, singleFaceInfo.faceRect.right, singleFaceInfo.faceRect.bottom);
imageLists.Images.Add(tempImagePath, image);
ImageListView.Items.Add(id, tempImagePath);
listViewFaceDetal.Items.Add(new ListViewItem(new string[] { "等待", id, "" }));
listViewFaceDetal.Refresh();
ImageListView.Refresh();
}));
}
else
{
LoggerService.logger.Error("提取人脸特征失败！");
}
faceInfos[0].Dispose();
faceInfos[0] = null;
faceInfos.Clear();
}
image.Dispose();
bitmap.Dispose();
return(result);
}
