基于Dlib的人脸识别客户端（UI界面）-阿里云开发者社区

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客户端界面

代码思路

1、开发环境

开发平台：win10
开发软件：PyCharm
界面开发：PyQt5

2、文档说明

face_lib文件夹

align_dlib.py文件：主要进行人脸对齐。
face_recg.py文件：进行人脸识别，其中阈值为0.4，可根据相应情况进行修改。
my.api.py文件：自己写的各种函数方法。
udp_recv.py文件：包含进行udp协议传输视频的类。

faces文件夹每一个文件夹名字必须是英文字母，代表一个类，其每一个类别中可以有多张图片，但数量过多，识别过慢。图片必须是96*96大小的经过对齐的jpg格式图片。
model文件夹存放你训练的模型。
gui.py文件一些界面相关的函数。
inference.py文件神经网络函数。
main.py文件

使用说明

点击“打开本地摄像头”按钮，在“摄像头采集信息”栏目中即会显示摄像头采集到的信息。
点击“打开网络摄像头”按钮，在“摄像头采集信息”栏目中即会显示通过WIFI传输到的视频信息。传输协议是UDP，目的是显示树莓派采集到的视频。
在打开摄像头后，点击获取人脸，左边会显示对齐后的人脸图片，大小为96*96.第一次使用时，数据集为空，在获得人脸图片后，点击新建人脸数据按钮，输入姓名，此时人脸图片保存在faces文件夹下。
当人脸图片上出现图片时，才可点击“人脸识别”按钮，点击后会在人脸图片下方显示预测的姓名和欧式距离。欧式距离，值越小，表示越相似。当距离大于一定阈值（默认为0.4），其姓名会显示为unknown。
点击“报错”功能按钮，把误识的人脸存入对应的人脸数据集中。例如：数据集中有5种人脸，分别标号为1、2、3、4、5，采集人脸其实为5号，却被误识为1、2、3、4或者unknown，这时点击“报错”按钮，把采集人脸存为5号人脸文件夹中即可。
阈值是影响人脸识别的关键因素，默认为0.4，可自行调整。
有2种模型可供下载，在model文件夹中可得下载链接

此种模型在微软MS-Celeb-1M数据集上训练，在LFW上测试的准确率可达87%以上。
此种模型在模型1的基础上，在LFW上继续训练，在LFW上测试的准确率可达91%以上。

可以自己训练模型

部分源码

main.py主函数文件：

import sys
import time
import cv2
import os
import numpy as np
from PyQt5 import QtWidgets, QtCore, QtGui
from face_lib import align_dlib, face_recg
from face_lib.udp_recv import UdpGetVideo
# import helpers
from gui import Ui_widget
class MyDesignerShow(QtWidgets.QWidget, Ui_widget):
    _signal = QtCore.pyqtSignal(int)
    def __init__(self):
        super(MyDesignerShow, self).__init__()
        self.timer_camera = QtCore.QTimer()   # 本地摄像头定时器
        self.timer_udp_video = QtCore.QTimer()  # UDP获取视频定时器
        self.cap = cv2.VideoCapture()         # 获得摄像头对象
        self.CAM_NUM = 0                      # 获取摄像头编号
        self.time = time                      # 获取时间对象
        self.PREDICTOR_PATH = './face_lib/shape_predictor_68_face_landmarks.dat'  # 关键点提取模型路径
        self.my_align = align_dlib.AlignDlib(self.PREDICTOR_PATH)     # 获取人脸对齐对象
        self.pix = QtGui.QPixmap()           # 获取QPixmap对象
        self.pic_show = None
        self.face_photo = None               # 人脸图片
        self.face_recog = face_recg.Recognize()  # 获取人脸识别对象
        self.setupUi(self)                          # 加载窗体
        self.btn_close.clicked.connect(self.close)   # 关闭程序
        self.btn_local_camera.clicked.connect(self.get_local_camera)   # 打开本地相机
        self.btn_web_camera.clicked.connect(self.get_udp_video)       # 打开UDP视频数据
        self.btn_get_face.clicked.connect(self.get_face)              # 得到人脸图像
        self.btn_debug.clicked.connect(self.debug)                    # 报错
        self.btn_new_face.clicked.connect(self.new_face)                # 新建人脸数据
        self.btn_face_recognize.clicked.connect(self.face_recognize)           # 人脸识别
        self.timer_camera.timeout.connect(self.show_local_camera)  # 计时结束调用show_camera()方法
        self.timer_udp_video.timeout.connect(self.show_udp_video)  # 计时结束调用show_udp_video()方法
    # 获取本地摄像头视频
    def get_local_camera(self):
        if self.timer_udp_video.isActive():      # 查询网络摄像头是否打开
            QtWidgets.QMessageBox.warning(self, u"Warning", u"请先关闭网络摄像头", buttons=QtWidgets.QMessageBox.Ok,
                                          defaultButton=QtWidgets.QMessageBox.Ok)
        elif not self.timer_camera.isActive():
            flag = self.cap.open(self.CAM_NUM)
            if not flag:
                QtWidgets.QMessageBox.warning(self, u"Warning", u"请检测相机与电脑是否连接正确", buttons=QtWidgets.QMessageBox.Ok,
                                                defaultButton=QtWidgets.QMessageBox.Ok)
            else:
                self.timer_camera.start(30)     # 30ms刷新一次
                self.btn_local_camera.setText(u'关闭本地摄像头')
        else:
            self.timer_camera.stop()    # 定时器关闭
            self.cap.release()          # 摄像头释放
            self.label_camera.clear()   # 视频显示区域清屏
            self.graphicsView.show()
            self.btn_local_camera.setText(u'打开本地摄像头')
    def show_local_camera(self):
        flag, image = self.cap.read()
        self.pic_show = cv2.resize(image, (640, 480))
        self.pic_show = cv2.cvtColor(self.pic_show, cv2.COLOR_BGR2RGB)
        showimage = QtGui.QImage(self.pic_show.data, self.pic_show.shape[1], self.pic_show.shape[0], QtGui.QImage.Format_RGB888)
        self.graphicsView.close()
        self.label_camera.setPixmap(self.pix.fromImage(showimage))
    def get_udp_video(self):
        if self.timer_camera.isActive():      # 查询本地摄像头
            QtWidgets.QMessageBox.warning(self, u"Warning", u"请先关闭本地摄像头", buttons=QtWidgets.QMessageBox.Ok,
                                          defaultButton=QtWidgets.QMessageBox.Ok)
        elif not self.timer_udp_video.isActive():
            self.time.sleep(1)
            self.udp_video = UdpGetVideo()  # 获取udp视频对象
            self.timer_udp_video.start(30)     # 10ms刷新一次
            self.btn_web_camera.setText(u'关闭网络摄像头')
        else:
            self.timer_udp_video.stop()    # 定时器关闭
            self.udp_video.close()         # udp视频接受关闭
            self.label_camera.clear()      # 视频显示区域清屏
            self.graphicsView.show()
            self.btn_web_camera.setText(u'打开网络摄像头')
    def show_udp_video(self):
        image = self.udp_video.receive()
        # 从内存缓存区中读取图像
        decimg = cv2.imdecode(image, 1)
        self.pic_show = cv2.resize(decimg, (640, 480))
        self.pic_show = cv2.cvtColor(self.pic_show, cv2.COLOR_BGR2RGB)
        showimage = QtGui.QImage(self.pic_show.data, self.pic_show.shape[1], self.pic_show.shape[0], QtGui.QImage.Format_RGB888)
        self.graphicsView.close()
        self.label_camera.setPixmap(self.pix.fromImage(showimage))
    def get_face(self):
        flag_cam = True
        if not self.timer_camera.isActive() and not self.timer_udp_video.isActive():      # 查询摄像头
            QtWidgets.QMessageBox.warning(self, u"Warning", u"请先打开摄像头", buttons=QtWidgets.QMessageBox.Ok,
                                          defaultButton=QtWidgets.QMessageBox.Ok)
            flag_cam = False
        if flag_cam:
            pic = self.pic_show
            if pic is not None:
                # 使用dlib自带的frontal_face_detector作为我们的特征提取器
                face_align = self.my_align.align(96, pic)
                if face_align is None:
                    QtWidgets.QMessageBox.warning(self, u"Warning", u"没有检测到人脸", buttons=QtWidgets.QMessageBox.Ok,
                                                  defaultButton=QtWidgets.QMessageBox.Ok)
                else:
                    face_align = cv2.cvtColor(face_align, cv2.COLOR_RGB2BGR)  # 转为BGR图片
                    self.face_photo = face_align
                    face_align = cv2.cvtColor(face_align, cv2.COLOR_BGR2RGB)  # 转为RGB图片
                    showimage = QtGui.QImage(face_align.data, face_align.shape[1], face_align.shape[0],
                                             QtGui.QImage.Format_RGB888)
                    self.label_face.setPixmap(QtGui.QPixmap.fromImage(showimage))
            else:
                QtWidgets.QMessageBox.warning(self, u"Warning", u"没有检测到图片", buttons=QtWidgets.QMessageBox.Ok,
                                              defaultButton=QtWidgets.QMessageBox.Ok)
    def face_recognize(self):
        if self.face_photo is None:
            QtWidgets.QMessageBox.warning(self, u"Warning", u"请先获取人脸图片", buttons=QtWidgets.QMessageBox.Ok,
                                          defaultButton=QtWidgets.QMessageBox.Ok)
        else:
            self.face_recog.reload_data()         # 重载人脸数据集
            names = self.face_recog.names
            if len(names) < 1:
                QtWidgets.QMessageBox.warning(self, u"Warning", u"数据集为空！", buttons=QtWidgets.QMessageBox.Ok,
                                              defaultButton=QtWidgets.QMessageBox.Ok)
            else:
                image_data = np.array(self.face_photo)
                image_data = image_data.astype('float32') / 255.0
                face_like = self.face_recog.whose_face(image_data)                    # 识别人脸
                for i in range(len(names)):
                    print('姓名：%s   欧式距离： %s' % (names[i], face_like[i]))
                    self.textEdit.append("姓名：" + str(names[i]) + "    欧式距离： " + str(face_like[i]))
                face_id, distance = self.face_recog.get_face_id(face_like)
                if face_id is not None:
                    self.label_name.setText(str(names[face_id]))
                else:
                    self.label_name.setText('unknown')
                self.label_look.setText(str(distance))
    def new_face(self):
        text, ok = QtWidgets.QInputDialog.getText(self, '英文字符！', '请输入你的英文名字：')
        if ok:
            print(text)
            if self.face_photo is not None:
                # 创建文件夹
                paths = './faces/' + text + '/'
                if not os.path.exists(paths):
                    os.makedirs(paths)
                    # 保存图片
                    s_time = time.ctime().replace(' ', '_').replace(':', '_')
                    cv2.imwrite(str(paths) + str(s_time) + '.jpg', self.face_photo)
                    self.textEdit.append("人脸已存放在 " + paths + ' 文件夹中！！')
                else:
                    QtWidgets.QMessageBox.warning(self, u"Warning", u"数据集中已有相同人名！",
                                                  buttons=QtWidgets.QMessageBox.Ok,
                                                  defaultButton=QtWidgets.QMessageBox.Ok)
        else:
            QtWidgets.QMessageBox.warning(self, u"Warning", u"输入错误", buttons=QtWidgets.QMessageBox.Ok,
                                          defaultButton=QtWidgets.QMessageBox.Ok)
    def debug(self):
        self.face_recog.reload_data()  # 重载人脸数据集
        num = self.face_recog.max_num
        file_names = self.face_recog.names
        print(file_names)
        if num > 0:
            result, ok = QtWidgets.QInputDialog.getItem(self, u"人脸数据校验", u"把人脸数据存入对应的文件夹中，可增加人脸识别的准确性。确定把图片存放在以下文件夹中吗？",
                                                        file_names, 1, False)
            if ok:
                if self.face_photo is not None:
                    # 保存图片
                    s_time = time.ctime().replace(' ', '_').replace(':', '_')
                    cv2.imwrite('./faces/' + result + '/' + str(s_time) + '.jpg', self.face_photo)
                    self.textEdit.append("已保存在./faces/" + result + '文件夹下!!')
        else:
            QtWidgets.QMessageBox.warning(self, u"Warning", u"数据集为空,请新建人脸数据！", buttons=QtWidgets.QMessageBox.Ok,
                                          defaultButton=QtWidgets.QMessageBox.Ok)
    def closeEvent(self, event):
        ok = QtWidgets.QPushButton()
        cacel = QtWidgets.QPushButton()
        msg = QtWidgets.QMessageBox(QtWidgets.QMessageBox.Warning, u"关闭", u"是否关闭！")
        msg.addButton(ok, QtWidgets.QMessageBox.ActionRole)
        msg.addButton(cacel, QtWidgets.QMessageBox.RejectRole)
        ok.setText(u'确定')
        cacel.setText(u'取消')
        if msg.exec_() == QtWidgets.QMessageBox.RejectRole:
            event.ignore()
        else:
            if self.cap.isOpened():
                self.cap.release()
            if self.timer_camera.isActive():
                self.timer_camera.stop()
            if self.timer_udp_video.isActive():
                self.timer_udp_video.stop()
            event.accept()
if __name__ == "__main__":
    if not os.path.exists("./faces"):
        os.makedirs("./faces")
    app = QtWidgets.QApplication(sys.argv)
    myshow = MyDesignerShow()    # 创建实例
    myshow.show()           # 使用Qidget的show()方法
    sys.exit(app.exec_())

UI界面文件：

# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'gui.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_widget(object):
    def setupUi(self, widget):
        widget.setObjectName("widget")
        widget.resize(1024, 768)
        widget.setMinimumSize(QtCore.QSize(1024, 768))
        widget.setMaximumSize(QtCore.QSize(1024, 768))
        self.label_camera = QtWidgets.QLabel(widget)
        self.label_camera.setEnabled(True)
        self.label_camera.setGeometry(QtCore.QRect(360, 40, 640, 480))
        self.label_camera.setMinimumSize(QtCore.QSize(640, 480))
        self.label_camera.setMaximumSize(QtCore.QSize(640, 480))
        self.label_camera.setText("")
        self.label_camera.setObjectName("label_camera")
        self.textEdit = QtWidgets.QTextEdit(widget)
        self.textEdit.setGeometry(QtCore.QRect(360, 550, 641, 181))
        self.textEdit.setObjectName("textEdit")
        self.graphicsView = QtWidgets.QGraphicsView(widget)
        self.graphicsView.setGeometry(QtCore.QRect(360, 40, 640, 480))
        self.graphicsView.setMinimumSize(QtCore.QSize(640, 480))
        self.graphicsView.setMaximumSize(QtCore.QSize(640, 480))
        self.graphicsView.setObjectName("graphicsView")
        self.label_2 = QtWidgets.QLabel(widget)
        self.label_2.setGeometry(QtCore.QRect(640, 20, 91, 16))
        self.label_2.setObjectName("label_2")
        self.label_3 = QtWidgets.QLabel(widget)
        self.label_3.setGeometry(QtCore.QRect(630, 530, 111, 20))
        self.label_3.setObjectName("label_3")
        self.layoutWidget = QtWidgets.QWidget(widget)
        self.layoutWidget.setGeometry(QtCore.QRect(40, 430, 281, 101))
        self.layoutWidget.setObjectName("layoutWidget")
        self.gridLayout = QtWidgets.QGridLayout(self.layoutWidget)
        self.gridLayout.setContentsMargins(0, 0, 0, 0)
        self.gridLayout.setObjectName("gridLayout")
        self.label_name = QtWidgets.QLabel(self.layoutWidget)
        self.label_name.setText("")
        self.label_name.setObjectName("label_name")
        self.gridLayout.addWidget(self.label_name, 0, 1, 1, 1)
        self.label_look = QtWidgets.QLabel(self.layoutWidget)
        self.label_look.setText("")
        self.label_look.setObjectName("label_look")
        self.gridLayout.addWidget(self.label_look, 2, 1, 1, 1)
        self.label_5 = QtWidgets.QLabel(self.layoutWidget)
        self.label_5.setObjectName("label_5")
        self.gridLayout.addWidget(self.label_5, 2, 0, 1, 1)
        self.label = QtWidgets.QLabel(self.layoutWidget)
        self.label.setObjectName("label")
        self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
        self.label_face = QtWidgets.QLabel(widget)
        self.label_face.setEnabled(True)
        self.label_face.setGeometry(QtCore.QRect(50, 210, 96, 96))
        self.label_face.setMinimumSize(QtCore.QSize(96, 96))
        self.label_face.setMaximumSize(QtCore.QSize(96, 96))
        self.label_face.setObjectName("label_face")
        self.textEdit_2 = QtWidgets.QTextEdit(widget)
        self.textEdit_2.setGeometry(QtCore.QRect(40, 550, 281, 181))
        self.textEdit_2.setObjectName("textEdit_2")
        self.layoutWidget1 = QtWidgets.QWidget(widget)
        self.layoutWidget1.setGeometry(QtCore.QRect(40, 70, 281, 121))
        self.layoutWidget1.setObjectName("layoutWidget1")
        self.gridLayout_2 = QtWidgets.QGridLayout(self.layoutWidget1)
        self.gridLayout_2.setContentsMargins(0, 0, 0, 0)
        self.gridLayout_2.setObjectName("gridLayout_2")
        self.btn_local_camera = QtWidgets.QPushButton(self.layoutWidget1)
        self.btn_local_camera.setObjectName("btn_local_camera")
        self.gridLayout_2.addWidget(self.btn_local_camera, 0, 0, 1, 1)
        self.btn_web_camera = QtWidgets.QPushButton(self.layoutWidget1)
        self.btn_web_camera.setObjectName("btn_web_camera")
        self.gridLayout_2.addWidget(self.btn_web_camera, 1, 0, 1, 1)
        self.btn_close = QtWidgets.QPushButton(self.layoutWidget1)
        self.btn_close.setObjectName("btn_close")
        self.gridLayout_2.addWidget(self.btn_close, 2, 0, 1, 1)
        self.btn_get_face = QtWidgets.QPushButton(widget)
        self.btn_get_face.setEnabled(True)
        self.btn_get_face.setGeometry(QtCore.QRect(230, 220, 91, 41))
        self.btn_get_face.setMinimumSize(QtCore.QSize(0, 0))
        self.btn_get_face.setMaximumSize(QtCore.QSize(100, 60))
        self.btn_get_face.setObjectName("btn_get_face")
        self.btn_face_recognize = QtWidgets.QPushButton(widget)
        self.btn_face_recognize.setGeometry(QtCore.QRect(230, 280, 91, 41))
        self.btn_face_recognize.setMinimumSize(QtCore.QSize(30, 30))
        self.btn_face_recognize.setMaximumSize(QtCore.QSize(16777215, 100))
        self.btn_face_recognize.setObjectName("btn_face_recognize")
        self.btn_new_face = QtWidgets.QPushButton(widget)
        self.btn_new_face.setGeometry(QtCore.QRect(50, 350, 80, 31))
        self.btn_new_face.setMaximumSize(QtCore.QSize(100, 100))
        self.btn_new_face.setObjectName("btn_new_face")
        self.btn_debug = QtWidgets.QPushButton(widget)
        self.btn_debug.setGeometry(QtCore.QRect(230, 350, 91, 31))
        self.btn_debug.setMaximumSize(QtCore.QSize(100, 100))
        self.btn_debug.setObjectName("btn_debug")
        self.retranslateUi(widget)
        QtCore.QMetaObject.connectSlotsByName(widget)
    def retranslateUi(self, widget):
        _translate = QtCore.QCoreApplication.translate
        widget.setWindowTitle(_translate("widget", "Form"))
        self.label_2.setText(_translate("widget", "摄像头采集信息"))
        self.label_3.setText(_translate("widget", "调试信息显示窗口"))
        self.label_5.setText(_translate("widget", "    欧式距离:"))
        self.label.setText(_translate("widget", "    预测姓名:"))
        self.label_face.setText(_translate("widget", "<html><head/><body><p align=\"center\"><span style=\" font-size:14pt; vertical-align:sub;\">人脸图片</span></p></body></html>"))
        self.textEdit_2.setHtml(_translate("widget", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li { white-space: pre-wrap; }\n"
"</style></head><body style=\" font-family:\'SimSun\'; font-size:9pt; font-weight:400; font-style:normal;\">\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt; font-weight:600;\">说明：</span></p>\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt;\">1.初次使用软件，请确保model文件夹存有训练好的权重</span></p>\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt;\">2.初次使用请新建人脸数据，名字必须为英文字符</span></p>\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt;\">3.欧式距离越大，代表越不相似，越小代表越相似</span></p>\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt;\">4.每次点击</span><span style=\" font-size:8pt; font-weight:600; text-decoration: underline;\">人脸识别</span><span style=\" font-size:8pt;\">前都必须先</span><span style=\" font-size:8pt; font-weight:600; text-decoration: underline;\">获取人脸</span></p>\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt; font-weight:600;\">步骤：</span></p>\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt;\">1.打开本地摄像头或者网络摄像头</span></p>\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt;\">2.点击获取人脸</span></p>\n"
"<p style=\" margin-top:12px; margin-bottom:12px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-size:8pt;\">3.点击人脸识别</span></p></body></html>"))
        self.btn_local_camera.setText(_translate("widget", "打开本地摄像头"))
        self.btn_web_camera.setText(_translate("widget", "打开网络摄像头"))
        self.btn_close.setText(_translate("widget", "关闭程序"))
        self.btn_get_face.setText(_translate("widget", "获取人脸"))
        self.btn_face_recognize.setText(_translate("widget", "人脸识别"))
        self.btn_new_face.setText(_translate("widget", "新建人脸数据"))
        self.btn_debug.setText(_translate("widget", "报错"))

基于Dlib的人脸识别客户端（UI界面）

客户端界面

代码思路

1、开发环境

2、文档说明

使用说明

部分源码

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