用|用 Python 做个电脑版人脸屏幕解锁神器用Python做个电脑版人脸屏幕解

作者：美图博客
https://www.meitubk.com/zatan/386.htm

前言
最近突然有个奇妙的想法，就是当我对着电脑屏幕的时候，电脑会先识别屏幕上的人脸是否是本人，如果识别是本人的话需要回答电脑说的暗语，答对了才会解锁并且有三次机会。如果都没答对就会发送邮件给我，通知有人在动我的电脑并上传该人头像。
过程环境是win10代码我使用的是python3所以在开始之前需要安装一些依赖包，请按顺序安装否者会报错

pip install cmake -i https://pypi.tuna.tsinghua.edu.cn/simple pip install dlib -i https://pypi.tuna.tsinghua.edu.cn/simple pip install face_recognition -i https://pypi.tuna.tsinghua.edu.cn/simple pip install opencv-python -i https://pypi.tuna.tsinghua.edu.cn/simple

接下来是构建识别人脸以及对比人脸的代码

import face_recognition import cv2 import numpy as npvideo_capture = cv2.VideoCapture(0) my_image = face_recognition.load_image_file("my.jpg") my_face_encoding = face_recognition.face_encodings(my_image)[0] known_face_encodings = [ my_face_encoding ] known_face_names = [ "Admin" ]face_names = [] face_locations = [] face_encodings = [] process_this_frame = Truewhile True: ret, frame = video_capture.read() small_frame = cv2.resize(frame, (0, 0), fx=0.25, fy=0.25) rgb_small_frame = small_frame[:, :, ::-1] if process_this_frame: face_locations = face_recognition.face_locations(rgb_small_frame) face_encodings = face_recognition.face_encodings(rgb_small_frame, face_locations) face_names = [] for face_encoding in face_encodings: matches = face_recognition.compare_faces(known_face_encodings, face_encoding) name = "Unknown" face_distances = face_recognition.face_distance(known_face_encodings, face_encoding) best_match_index = np.argmin(face_distances) if matches[best_match_index]: name = known_face_names[best_match_index] face_names.append(name)process_this_frame = not process_this_frame for (top, right, bottom, left), name in zip(face_locations, face_names): top *= 4 left *= 4 right *= 4 bottom *= 4 font = cv2.FONT_HERSHEY_DUPLEX cv2.rectangle(frame, (left, top), (right, bottom), (0, 0, 255), 2) cv2.rectangle(frame, (left, bottom - 35), (right, bottom), (0, 0, 255), cv2.FILLED) cv2.putText(frame, name, (left + 6, bottom - 6), font, 1.0, (255, 255, 255), 1)cv2.imshow('Video', frame) if cv2.waitKey(1) & 0xFF == ord('q'): breakvideo_capture.release() cv2.destroyAllWindows()

其中my.jpg需要你自己拍摄上传，运行可以发现在你脸上会出现Admin的框框，我去网上找了张图片类似这样子

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识别功能已经完成了接下来就是语音识别和语音合成，这需要使用到百度AI来实现了，去登录百度AI的官网到控制台选择左边的语音技术，然后点击面板的创建应用按钮，来到创建应用界面

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打造电脑版人脸屏幕解锁神器创建后会得到AppID、API Key、Secret Key记下来，然后开始写语音合成的代码。安装百度AI提供的依赖包

pip install baidu-aip -i https://pypi.tuna.tsinghua.edu.cn/simple pip install playsound -i https://pypi.tuna.tsinghua.edu.cn/simple

然后是简单的语音播放代码，运行下面代码可以听到萌妹子的声音

import sys from aip import AipSpeech from playsound import playsoundAPP_ID = '' API_KEY = '' SECRET_KEY = ''client = AipSpeech(APP_ID, API_KEY, SECRET_KEY) result = client.synthesis('你好吖', 'zh', 1, {'vol': 5, 'per': 4, 'spd': 5, })if not isinstance(result, dict): with open('auido.mp3', 'wb') as file: file.write(result)filepath = eval(repr(sys.path[0]).replace('\\', '/')) + '//auido.mp3' playsound(filepath)

有了上面的代码就完成了检测是否在电脑前（人脸识别）以及电脑念出暗语（语音合成）然后我们还需要回答暗号给电脑，所以还需要完成语音识别。

import wave import pyaudio from aip import AipSpeechAPP_ID = '' API_KEY = '' SECRET_KEY = ''client = AipSpeech(APP_ID, API_KEY, SECRET_KEY) CHUNK = 1024 FORMAT = pyaudio.paInt16 CHANNELS = 1 RATE = 8000 RECORD_SECONDS = 3 WAVE_OUTPUT_FILENAME = "output.wav"p = pyaudio.PyAudio() stream = p.open(format=FORMAT, channels=CHANNELS, rate=RATE, input=True, frames_per_buffer=CHUNK)print("* recording") frames = [] for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)): data = https://www.it610.com/article/stream.read(CHUNK) frames.append(data) print("* done recording")stream.stop_stream() stream.close() p.terminate() wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb') wf.setnchannels(CHANNELS) wf.setsampwidth(p.get_sample_size(FORMAT)) wf.setframerate(RATE) wf.writeframes(b''.join(frames))def get_file_content(): with open(WAVE_OUTPUT_FILENAME, 'rb') as fp: return fp.read()result = client.asr(get_file_content(), 'wav', 8000, {'dev_pid': 1537, }) print(result)

运行此代码之前需要安装pyaudio依赖包，由于在win10系统上安装会报错所以可以通过如下方式安装。到这个链接 https://www.lfd.uci.edu/~gohlke/pythonlibs/#pyaudio 去下载对应的安装包然后安装即可。

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打造电脑版人脸屏幕解锁神器运行后我说了你好，可以看到识别出来了。那么我们的小模块功能就都做好了接下来就是如何去整合它们。可以发现在人脸识别代码中if matches[best_match_index]这句判断代码就是判断是否为电脑主人，所以我们把这个判断语句当作main函数的入口。

if matches[best_match_index]: # 在这里写识别到之后的功能 name = known_face_names[best_match_index]

那么识别到后我们应该让电脑发出询问暗号，也就是语音合成代码，然我们将它封装成一个函数，顺便重构下人脸识别的代码。

import cv2 import time import numpy as np import face_recognitionvideo_capture = cv2.VideoCapture(0) my_image = face_recognition.load_image_file("my.jpg") my_face_encoding = face_recognition.face_encodings(my_image)[0] known_face_encodings = [ my_face_encoding ] known_face_names = [ "Admin" ]face_names = [] face_locations = [] face_encodings = [] process_this_frame = Truedef speak(content): import sys from aip import AipSpeech from playsound import playsound APP_ID = '' API_KEY = '' SECRET_KEY = '' client = AipSpeech(APP_ID, API_KEY, SECRET_KEY) result = client.synthesis(content, 'zh', 1, {'vol': 5, 'per': 0, 'spd': 5, }) if not isinstance(result, dict): with open('auido.mp3', 'wb') as file: file.write(result) filepath = eval(repr(sys.path[0]).replace('\\', '/')) + '//auido.mp3' playsound(filepath)try: while True: ret, frame = video_capture.read() small_frame = cv2.resize(frame, (0, 0), fx=0.25, fy=0.25) rgb_small_frame = small_frame[:, :, ::-1] if process_this_frame: face_locations = face_recognition.face_locations(rgb_small_frame) face_encodings = face_recognition.face_encodings(rgb_small_frame, face_locations) face_names = [] for face_encoding in face_encodings: matches = face_recognition.compare_faces(known_face_encodings, face_encoding) name = "Unknown" face_distances = face_recognition.face_distance(known_face_encodings, face_encoding) best_match_index = np.argmin(face_distances) if matches[best_match_index]: speak("识别到人脸，开始询问暗号，请回答接下来我说的问题") time.sleep(1) speak("天王盖地虎") error = 1 / 0 name = known_face_names[best_match_index] face_names.append(name) process_this_frame = not process_this_frame for (top, right, bottom, left), name in zip(face_locations, face_names): top *= 4 left *= 4 right *= 4 bottom *= 4 font = cv2.FONT_HERSHEY_DUPLEX cv2.rectangle(frame, (left, top), (right, bottom), (0, 0, 255), 2) cv2.rectangle(frame, (left, bottom - 35), (right, bottom), (0, 0, 255), cv2.FILLED) cv2.putText(frame, name, (left + 6, bottom - 6), font, 1.0, (255, 255, 255), 1)cv2.imshow('Video', frame) if cv2.waitKey(1) & 0xFF == ord('q'): break except Exception as e: print(e) finally: video_capture.release() cv2.destroyAllWindows()

这里有一点需要注意，由于playsound播放音乐的时候会一直占用这个资源，所以播放下一段音乐的时候会报错，解决方法是修改~\Python37\Lib\site-packages下的playsound.py文件，找到如下代码

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打造电脑版人脸屏幕解锁神器在sleep函数下面添加winCommand('close', alias)这句代码，保存下就可以了。运行发现可以正常将两句话都说出来。那么说出来之后就要去监听了，我们还要打包一个函数。

def record(): import wave import json import pyaudio from aip import AipSpeechAPP_ID = '' API_KEY = '' SECRET_KEY = ''client = AipSpeech(APP_ID, API_KEY, SECRET_KEY) CHUNK = 1024 FORMAT = pyaudio.paInt16 CHANNELS = 1 RATE = 8000 RECORD_SECONDS = 3 WAVE_OUTPUT_FILENAME = "output.wav"p = pyaudio.PyAudio() stream = p.open(format=FORMAT, channels=CHANNELS, rate=RATE, input=True, frames_per_buffer=CHUNK)print("* recording") frames = [] for i in range(0, int(RATE / CHUNK * RECORD_SECONDS)): data = https://www.it610.com/article/stream.read(CHUNK) frames.append(data) print("* done recording")stream.stop_stream() stream.close() p.terminate() wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb') wf.setnchannels(CHANNELS) wf.setsampwidth(p.get_sample_size(FORMAT)) wf.setframerate(RATE) wf.writeframes(b''.join(frames))def get_file_content(): with open(WAVE_OUTPUT_FILENAME, 'rb') as fp: return fp.read()result = client.asr(get_file_content(), 'wav', 8000, {'dev_pid': 1537, }) result = json.loads(str(result).replace("'", '"')) return result["result"][0]

【用|用 Python 做个电脑版人脸屏幕解锁神器】将识别到人脸后的代码修改成如下

if matches[best_match_index]: speak("识别到人脸，开始询问暗号，请回答接下来我说的问题") time.sleep(1) speak("天王盖地虎")flag = False for times in range(0, 3): content = record() if "小鸡炖蘑菇" in content: speak("暗号通过") flag = True break else: speak("暗号不通过，再试一次") if flag: print("解锁") else: print("发送邮件并将坏人人脸图片上传！") error = 1 / 0 name = known_face_names[best_match_index]

运行看看效果，回答电脑小鸡炖蘑菇，电脑回答暗号通过。这样功能就基本上完成了。