教你用300行Python代码实现一个人脸识别系统

Posted 肆十二

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用300行Python代码实现一个人脸识别系统

最近又多了不少朋友关注,先在这里谢谢大家。关注我的朋友大多数都是大学生,而且我简单看了一下,低年级的大学生居多,大多数都是为了完成课程设计,作为一个过来人,还是希望大家平时能多抽出点时间学习一下,这种临时抱佛脚的策略要少用嗷。今天我们来python实现一个人脸识别系统,主要是借助了dlib这个库,相当于我们直接调用现成的库来进行人脸识别,就省去了之前教程中的数据收集和模型训练的步骤了。

B站视频:用300行代码实现人脸识别系统_哔哩哔哩_bilibili

CSDN博客:用300行Python代码实现一个人脸识别系统_dejahu的博客-CSDN博客

码云地址:face_dlib_py37_42: 用300行代码开发一个人脸识别系统-42 (gitee.com)

预编译dlib库下载地址:人脸识别系统+windows64位-dlib-19.17.0-cp37-cp37m-win_amd64.zip-深度学习文档类资源-CSDN文库

注:直接安装dlib库可能会有编译错误,可以通过下列方式获取编译好的dlib库

基本原理

人脸识别和目标检测这些还不太一样,比如大家传统的训练一个目标检测模型,你只有对这个目标训练了之后,你的模型才能找到这样的目标,比如你的目标检测模型如果是检测植物的,那显然就不能检测动物。但是人脸识别就不一样,以你的手机为例,你发现你只录入了一次你的人脸信息,不需要训练,他就能准确的识别你,这里识别的原理是通过人脸识别的模型提取你脸部的特征向量,然后将实时检测到的你的人脸同数据库中保存的人脸进行比对,如果相似度超过一定的阈值之后,就认为比对成功。不过我这里说的只是简化版本的人脸识别,现在手机和门禁这些要复杂和安全的多,也不是简单平面上的人脸识别。

总结下来可以分为下面的步骤:

  1. 上传人脸到数据库
  2. 人脸检测
  3. 数据库比对并返回结果

这里我做了一个简答的示意图,可以帮助大家简单理解一下。

代码实现

废话不多说,这里就是我们的代码实现,代码我已经上传到码云,大家直接下载就行,地址就在博客开头。

不会安装python环境的兄弟请看这里:如何在pycharm中配置anaconda的虚拟环境_dejahu的博客-CSDN博客_如何在pycharm中配置anaconda

创建虚拟环境

创建虚拟环境前请大家先下载博客开头的码云源码到本地。

本次我们需要使用到python3.7的虚拟环境,命令如下:

conda create -n face python==3.7.3
conda activate face

安装必要的库

pip install -r requirements.txt

愉快地开始你的人脸识别吧!

执行下面的主文件即可

python UI.py

或者在pycharm中按照下面的方式直接运行即可

首先将你需要识别的人脸上传到数据库中

通过第二个视频检测功能识别实时的人脸

详细的代码如下:

# -*- coding: utf-8 -*-
"""
-------------------------------------------------
Project Name: yolov5-jungong
File Name: window.py.py
Author: chenming
Create Date: 2021/11/8
Description:图形化界面,可以检测摄像头、视频和图片文件
-------------------------------------------------
"""
# 应该在界面启动的时候就将模型加载出来,设置tmp的目录来放中间的处理结果
import shutil
import PyQt5.QtCore
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import threading
import argparse
import os
import sys
from pathlib import Path
import cv2
import torch
import torch.backends.cudnn as cudnn
import os.path as osp
FILE = Path(__file__).resolve()
ROOT = FILE.parents[0]  # YOLOv5 root directory
if str(ROOT) not in sys.path:
    sys.path.append(str(ROOT))  # add ROOT to PATH
ROOT = Path(os.path.relpath(ROOT, Path.cwd()))  # relative

from models.common import DetectMultiBackend
from utils.datasets import IMG_FORMATS, VID_FORMATS, LoadImages, LoadStreams
from utils.general import (LOGGER, check_file, check_img_size, check_imshow, check_requirements, colorstr,
                           increment_path, non_max_suppression, print_args, scale_coords, strip_optimizer, xyxy2xywh)
from utils.plots import Annotator, colors, save_one_box
from utils.torch_utils import select_device, time_sync


# 添加一个关于界面
# 窗口主类
class MainWindow(QTabWidget):
    # 基本配置不动,然后只动第三个界面
    def __init__(self):
        # 初始化界面
        super().__init__()
        self.setWindowTitle('Target detection system')
        self.resize(1200, 800)
        self.setWindowIcon(QIcon("images/UI/lufei.png"))
        # 图片读取进程
        self.output_size = 480
        self.img2predict = ""
        self.device = 'cpu'
        # # 初始化视频读取线程
        self.vid_source = '0'  # 初始设置为摄像头
        self.stopEvent = threading.Event()
        self.webcam = True
        self.stopEvent.clear()
        self.model = self.model_load(weights="runs/train/exp_yolov5s/weights/best.pt",
                                     device="cpu")  # todo 指明模型加载的位置的设备
        self.initUI()
        self.reset_vid()

    '''
    ***模型初始化***
    '''
    @torch.no_grad()
    def model_load(self, weights="",  # model.pt path(s)
                   device='',  # cuda device, i.e. 0 or 0,1,2,3 or cpu
                   half=False,  # use FP16 half-precision inference
                   dnn=False,  # use OpenCV DNN for ONNX inference
                   ):
        device = select_device(device)
        half &= device.type != 'cpu'  # half precision only supported on CUDA
        device = select_device(device)
        model = DetectMultiBackend(weights, device=device, dnn=dnn)
        stride, names, pt, jit, onnx = model.stride, model.names, model.pt, model.jit, model.onnx
        # Half
        half &= pt and device.type != 'cpu'  # half precision only supported by PyTorch on CUDA
        if pt:
            model.model.half() if half else model.model.float()
        print("模型加载完成!")
        return model

    '''
    ***界面初始化***
    '''
    def initUI(self):
        # 图片检测子界面
        font_title = QFont('楷体', 16)
        font_main = QFont('楷体', 14)
        # 图片识别界面, 两个按钮,上传图片和显示结果
        img_detection_widget = QWidget()
        img_detection_layout = QVBoxLayout()
        img_detection_title = QLabel("图片识别功能")
        img_detection_title.setFont(font_title)
        mid_img_widget = QWidget()
        mid_img_layout = QHBoxLayout()
        self.left_img = QLabel()
        self.right_img = QLabel()
        self.left_img.setPixmap(QPixmap("images/UI/up.jpeg"))
        self.right_img.setPixmap(QPixmap("images/UI/right.jpeg"))
        self.left_img.setAlignment(Qt.AlignCenter)
        self.right_img.setAlignment(Qt.AlignCenter)
        mid_img_layout.addWidget(self.left_img)
        mid_img_layout.addStretch(0)
        mid_img_layout.addWidget(self.right_img)
        mid_img_widget.setLayout(mid_img_layout)
        up_img_button = QPushButton("上传图片")
        det_img_button = QPushButton("开始检测")
        up_img_button.clicked.connect(self.upload_img)
        det_img_button.clicked.connect(self.detect_img)
        up_img_button.setFont(font_main)
        det_img_button.setFont(font_main)
        up_img_button.setStyleSheet("QPushButtoncolor:white"
                                    "QPushButton:hoverbackground-color: rgb(2,110,180);"
                                    "QPushButtonbackground-color:rgb(48,124,208)"
                                    "QPushButtonborder:2px"
                                    "QPushButtonborder-radius:5px"
                                    "QPushButtonpadding:5px 5px"
                                    "QPushButtonmargin:5px 5px")
        det_img_button.setStyleSheet("QPushButtoncolor:white"
                                     "QPushButton:hoverbackground-color: rgb(2,110,180);"
                                     "QPushButtonbackground-color:rgb(48,124,208)"
                                     "QPushButtonborder:2px"
                                     "QPushButtonborder-radius:5px"
                                     "QPushButtonpadding:5px 5px"
                                     "QPushButtonmargin:5px 5px")
        img_detection_layout.addWidget(img_detection_title, alignment=Qt.AlignCenter)
        img_detection_layout.addWidget(mid_img_widget, alignment=Qt.AlignCenter)
        img_detection_layout.addWidget(up_img_button)
        img_detection_layout.addWidget(det_img_button)
        img_detection_widget.setLayout(img_detection_layout)

        # todo 视频识别界面
        # 视频识别界面的逻辑比较简单,基本就从上到下的逻辑
        vid_detection_widget = QWidget()
        vid_detection_layout = QVBoxLayout()
        vid_title = QLabel("视频检测功能")
        vid_title.setFont(font_title)
        self.vid_img = QLabel()
        self.vid_img.setPixmap(QPixmap("images/UI/up.jpeg"))
        vid_title.setAlignment(Qt.AlignCenter)
        self.vid_img.setAlignment(Qt.AlignCenter)
        self.webcam_detection_btn = QPushButton("摄像头实时监测")
        self.mp4_detection_btn = QPushButton("视频文件检测")
        self.vid_stop_btn = QPushButton("停止检测")
        self.webcam_detection_btn.setFont(font_main)
        self.mp4_detection_btn.setFont(font_main)
        self.vid_stop_btn.setFont(font_main)
        self.webcam_detection_btn.setStyleSheet("QPushButtoncolor:white"
                                                "QPushButton:hoverbackground-color: rgb(2,110,180);"
                                                "QPushButtonbackground-color:rgb(48,124,208)"
                                                "QPushButtonborder:2px"
                                                "QPushButtonborder-radius:5px"
                                                "QPushButtonpadding:5px 5px"
                                                "QPushButtonmargin:5px 5px")
        self.mp4_detection_btn.setStyleSheet("QPushButtoncolor:white"
                                             "QPushButton:hoverbackground-color: rgb(2,110,180);"
                                             "QPushButtonbackground-color:rgb(48,124,208)"
                                             "QPushButtonborder:2px"
                                             "QPushButtonborder-radius:5px"
                                             "QPushButtonpadding:5px 5px"
                                             "QPushButtonmargin:5px 5px")
        self.vid_stop_btn.setStyleSheet("QPushButtoncolor:white"
                                        "QPushButton:hoverbackground-color: rgb(2,110,180);"
                                        "QPushButtonbackground-color:rgb(48,124,208)"
                                        "QPushButtonborder:2px"
                                        "QPushButtonborder-radius:5px"
                                        "QPushButtonpadding:5px 5px"
                                        "QPushButtonmargin:5px 5px")
        self.webcam_detection_btn.clicked.connect(self.open_cam)
        self.mp4_detection_btn.clicked.connect(self.open_mp4)
        self.vid_stop_btn.clicked.connect(self.close_vid)
        # 添加组件到布局上
        vid_detection_layout.addWidget(vid_title)
        vid_detection_layout.addWidget(self.vid_img)
        vid_detection_layout.addWidget(self.webcam_detection_btn)
        vid_detection_layout.addWidget(self.mp4_detection_btn)
        vid_detection_layout.addWidget(self.vid_stop_btn)
        vid_detection_widget.setLayout(vid_detection_layout)

        # todo 关于界面
        about_widget = QWidget()
        about_layout = QVBoxLayout()
        about_title = QLabel('欢迎使用目标检测系统\\n\\n 提供付费指导:有需要的好兄弟加下面的QQ即可')  # todo 修改欢迎词语
        about_title.setFont(QFont('楷体', 18))
        about_title.setAlignment(Qt.AlignCenter)
        about_img = QLabel()
        about_img.setPixmap(QPixmap('images/UI/qq.png'))
        about_img.setAlignment(Qt.AlignCenter)

        # label4.setText("<a href='https://oi.wiki/wiki/学习率的调整'>如何调整学习率</a>")
        label_super = QLabel()  # todo 更换作者信息
        label_super.setText("<a href='https://blog.csdn.net/ECHOSON'>或者你可以在这里找到我-->肆十二</a>")
        label_super.setFont(QFont('楷体', 16))
        label_super.setOpenExternalLinks(True)
        # label_super.setOpenExternalLinks(True)
        label_super.setAlignment(Qt.AlignRight)
        about_layout.addWidget(about_title)
        about_layout.addStretch()
        about_layout.addWidget(about_img)
        about_layout.addStretch()
        about_layout.addWidget(label_super)
        about_widget.setLayout(about_layout)

        self.left_img.setAlignment(Qt.AlignCenter)
        self.addTab(img_detection_widget, '图片检测')
        self.addTab(vid_detection_widget, '视频检测')
        self.addTab(about_widget, '联系我')
        self.setTabIcon(0, QIcon('images/UI/lufei.png'))
        self.setTabIcon(1, QIcon('images/UI/lufei.png'))
        self.setTabIcon(2, QIcon('images/UI/lufei.png'))

    '''
    ***上传图片***
    '''
    def upload_img(self):
        # 选择录像文件进行读取
        fileName, fileType = QFileDialog.getOpenFileName(self, 'Choose file', '', '*.jpg *.png *.tif *.jpeg')
        if fileName:
            suffix = fileName.split(".")[-1]
            save_path = osp.join("images/tmp", "tmp_upload." + suffix)
            shutil.copy(fileName, save_path)
            # 应该调整一下图片的大小,然后统一防在一起
            im0 = cv2.imread(save_path)
            resize_scale = self.output_size / im0.shape[0]
            im0 = cv2.resize(im0, (0, 0), fx=resize_scale, fy=resize_scale)
            cv2.imwrite("images/tmp/upload_show_result.jpg", im0)
            # self.right_img.setPixmap(QPixmap("images/tmp/single_result.jpg"))
            self.img2predict = fileName
            self.left_img.setPixmap(QPixmap("images/tmp/upload_show_result.jpg"))
            # todo 上传图片之后右侧的图片重置,
            self.right_img.setPixmap(QPixmap("images/UI/right.jpeg"))

    '''
    ***检测图片***
    '''
    def detect_img(self):
        model = self.model
        output_size = self.output_size
        source = self.img2predict  # file/dir/URL/glob, 0 for webcam
        imgsz = 640  # inference size (pixels)
        conf_thres = 0.25  # confidence threshold
        iou_thres = 0.45  # NMS IOU threshold
        max_det = 1000  # maximum detections per image
        device = self.device  # cuda device, i.e. 0 or 0,1,2,3 or cpu
        view_img = False  # show results
        save_txt = False  # save results to *.txt
        save_conf = False  # save confidences in --save-txt labels
        save_crop = False  # save cropped prediction boxes
        nosave = False  # do not save images/videos
        classes = None  # filter by class: --class 0, or --class 0 2 3
        agnostic_nms = False  # class-agnostic NMS
        augment = False  # ugmented inference
        visualize = False  # visualize features
        line_thickness = 3  # bounding box thickness (pixels)
        hide_labels = False  # hide labels
        hide_conf = False  # hide confidences
        half = False  # use FP16 half-precision inference
        dnn = False  # use OpenCV DNN for ONNX inference
        print(source)
        if source == "":
            QMessageBox.warning(self, "请上传", "请先上传图片再进行检测")
        else:
            source = str(source)
            device = select_device(self.device)
            webcam = False
            stride, names, pt, jit, onnx = model.stride, model.names, model.pt, model.jit, model.onnx
            imgsz = check_img_size(imgsz, s=stride)  # check image size
            save_img = not nosave and not source.endswith('.txt')  # save inference images
            # Dataloader
            if webcam:
                view_img = check_imshow()
                cudnn.benchmark = True  # set True to speed up constant image size inference
                dataset = LoadStreams(source, img_size=imgsz, stride=stride, auto=pt and not jit)
                bs = len(dataset)  # batch_size
            else:
                dataset = LoadImages(source, img_size=imgsz, stride=stride, auto=pt and not jit)
                bs = 1  # batch_size
            vid_path, vid_writer = [None] * bs, [None] * bs
            # Run inference
            if pt and device.type != 'cpu':
                model(torch.zeros(1, 3, *imgsz).to(device).type_as(next(model.model.parameters())))  # warmup
            dt, seen = [0.0, 0.0, 0.0], 0
            for path, im, im0s, vid_cap, s in dataset:
                t1 = time_sync()
                im = torch.from_numpy(im).to(device)
                im = im.half() if half else im.float()  # uint8 to fp16/32
                im /= 255  # 0 - 255 to 0.0 - 1.0
                if len(im.shape) == 3:
                    im = im[None]  # expand for batch dim
                t2 = time_sync()
                dt[0] += t2 - t1
                # Inference
                # visualize = increment_path(save_dir / Path(path).stem, mkdir=True) if visualize else False
                pred = model(im, augment=augment, visualize=visualize)
                t3 = time_sync()
                dt[1] += t3 - t2
                # NMS
                pred = non_max_suppression(pred, conf_thres, iou_thres, classes, agnostic_nms, max_det=max_det)
                dt[2] += time_sync() - t3
                # Second-stage classifier (optional)
                # pred = utils.general.apply_classifier(pred, classifier_model, im, im0s)
                # Process predictions
                for i, det in enumerate(pred):  # per image
                    seen += 1
                    if webcam:  # batch_size >= 1
                        p, im0, frame = path[i], im0s[i].copy(), dataset.count
                        s += f'i: '
                    else:
                        p, im0, frame = path, im0s.copy(), getattr(dataset, 'frame'以上是关于教你用300行Python代码实现一个人脸识别系统的主要内容,如果未能解决你的问题,请参考以下文章

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