人工智慧之Python人臉識別技術,人人都能做識別!
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作者丨Python小哥哥
https://www.jianshu.com/p/dce1498ef0ee
一、環境搭建
1.系統環境
Ubuntu .04
Python
2.7.14
pycharm
開發工具2.開發環境,安裝各種系統包
人臉檢測基於dlib,dlib依賴Boost和cmake
在windows中如果要使用dlib還是比較麻煩的,如果想省時間可以在anaconda中安裝
conda install -c conda-forge dlib=19.4
install build get install -3 get install$ sudo apt-get
$ sudo apt-
$ sudo apt-
libboost-all-dev
其他重要的包
$ pip install numpy
$ pip install scipy
$ pip install opencv-python
$ pip install dlib
安裝 face_recognition
# 安裝 face_recognition # 安裝face_recognition過程中會自動安裝 numpy、scipy 等
$ pip install face_recognition
二、使用教程
1、facial_features文件夾
此demo主要展示了識別指定圖片中人臉的特徵數據,下面就是人臉的八個特徵,我們就是要獲取特徵數據
"chin" "left_eyebrow" "right_eyebrow" "nose_bridge" "nose_tip" "left_eye" "right_eye" "top_lip" "bottom_lip"
運行結果:
自動識別圖片中的人臉,並且識別它的特徵
原圖:
特徵數據,數據就是運行出來的矩陣,也就是一個二維數組
代碼:
# -*- coding: utf-8 -*- # 自動識別人臉特徵 # filename : find_facial_features_in_picture.py
# 導入pil模塊 ,可用命令安裝 apt-get install python-Imaging
from
PILimport
Image, ImageDraw# 導入face_recogntion模塊,可用命令安裝 pip install face_recognition
import
face_recognition# 將jpg文件載入到numpy 數組中
image = face_recognition.load_image_file(
"chenduling.jpg"
)#查找圖像中所有面部的所有面部特徵
face_landmarks_list = face_recognition.face_landmarks(image)
"I found {} face(s) in this photograph."
.format(len(face_landmarks_list)))for
face_landmarksin
face_landmarks_list:
#列印此圖像中每個面部特徵的位置
facial_features = [
"chin"
,"left_eyebrow"
,"right_eyebrow"
,"nose_bridge"
,"nose_tip"
,"left_eye"
,"right_eye"
,"top_lip"
,"bottom_lip"
]
for
facial_featurein
facial_features:"The {} in this face has the following points: {}"
.format(facial_feature, face_landmarks[facial_feature]))
#讓我們在圖像中描繪出每個人臉特徵!
pil_image = Image.fromarray(image)
d = ImageDraw.Draw(pil_image)
for
facial_featurein
facial_features:d.line(face_landmarks[facial_feature], width=
5
) pil_image.show()
2、find_face文件夾
不僅能識別出來所有的人臉,而且可以將其截圖挨個顯示出來,列印在前台窗口
原始的圖片
識別的圖片
代碼:
# -*- coding: utf-8 -*- # 識別圖片中的所有人臉並顯示出來 # filename : find_faces_in_picture.py
# 導入pil模塊 ,可用命令安裝 apt-get install python-Imaging
from
PILimport
Image# 導入face_recogntion模塊,可用命令安裝 pip install face_recognition
import
face_recognition# 將jpg文件載入到numpy 數組中
image = face_recognition.load_image_file(
"yiqi.jpg"
)# 使用默認的給予HOG模型查找圖像中所有人臉
# 這個方法已經相當準確了,但還是不如CNN模型那麼準確,因為沒有使用GPU加速
# 另請參見: find_faces_in_picture_cnn.py
face_locations = face_recognition.face_locations(image)
# 使用CNN模型
# face_locations = face_recognition.face_locations(image, number_of_times_to_upsample=0, model="cnn")
# 列印:我從圖片中找到了 多少 張人臉
"I found {} face(s) in this photograph."
.format(len(face_locations)))# 循環找到的所有人臉
for
face_locationin
face_locations:
# 列印每張臉的位置信息
top, right, bottom, left = face_location
"A face is located at pixel location Top: {}, Left: {}, Bottom: {}, Right: {}"
.format(top, left, bottom, right))# 指定人臉的位置信息,然後顯示人臉圖片
face_image = image[top:bottom, left:right]
pil_image = Image.fromarray(face_image)
pil_image.show()
3、know_face文件夾
通過設定的人臉圖片識別未知圖片中的人臉
# -*- coding: utf-8 -*- # 識別人臉鑒定是哪個人
# 導入face_recogntion模塊,可用命令安裝 pip install face_recognition
import face_recognition
#將jpg文件載入到numpy數組中
chen_image = face_recognition.load_image_file(
"chenduling.jpg"
)#要識別的圖片
unknown_image = face_recognition.load_image_file(
"sunyizheng.jpg"
)#獲取每個圖像文件中每個面部的面部編碼
#由於每個圖像中可能有多個面,所以返回一個編碼列表。
#但是由於我知道每個圖像只有一個臉,我只關心每個圖像中的第一個編碼,所以我取索引0。
chen_face_encoding = face_recognition.face_encodings(chen_image)[0]
print("chen_face_encoding:{}".format(chen_face_encoding))
unknown_face_encoding = face_recognition.face_encodings(unknown_image)[0]
print(
"unknown_face_encoding :{}"
.format(unknown_face_encoding))known_faces = [
chen_face_encoding
]
#結果是True/false的數組,未知面孔known_faces陣列中的任何人相匹配的結果
results = face_recognition.compare_faces(known_faces, unknown_face_encoding)
print(
"result :{}"
.format(results))print(
"這個未知面孔是 陳都靈 嗎? {}"
.format(results[0]))print(
"這個未知面孔是 我們從未見過的新面孔嗎? {}"
.format(not True in results))4、video文件夾
通過調用電腦攝像頭動態獲取視頻內的人臉,將其和我們指定的圖片集進行匹配,可以告知我們視頻內的人臉是否是我們設定好的
實現:
代碼:
# -*- coding: utf-8 -*- # 攝像頭頭像識別
import face_recognition
import cv2
video_capture = cv2.VideoCapture(0)
# 本地圖像
chenduling_image = face_recognition.load_image_file(
"chenduling.jpg"
)chenduling_face_encoding = face_recognition.face_encodings(chenduling_image)[0]
# 本地圖像二
sunyizheng_image = face_recognition.load_image_file(
"sunyizheng.jpg"
)sunyizheng_face_encoding = face_recognition.face_encodings(sunyizheng_image)[0]
# 本地圖片三
zhangzetian_image = face_recognition.load_image_file(
"zhangzetian.jpg"
)zhangzetian_face_encoding = face_recognition.face_encodings(zhangzetian_image)[0]
# Create arrays of known face encodings and their names
# 臉部特徵數據的集合
known_face_encodings = [
chenduling_face_encoding,
sunyizheng_face_encoding,
zhangzetian_face_encoding
]
# 人物名稱的集合
known_face_names = [
"michong"
,"sunyizheng"
,"chenduling"
]
face_locations = []
face_encodings = []
face_names = []
process_this_frame = True
while True:
# 讀取攝像頭畫面
ret, frame = video_capture.read()
# 改變攝像頭圖像的大小,圖像小,所做的計算就少
small_frame = cv2.resize(frame, (0, 0), fx=0.25, fy=0.25)
# opencv的圖像是BGR格式的,而我們需要是的RGB格式的,因此需要進行一個轉換。
rgb_small_frame = small_frame[:, :, ::-1]
# Only process every other frame of video to save time
if process_this_frame:
# 根據encoding來判斷是不是同一個人,是就輸出true,不是為flase
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:
# 默認為unknown
matches = face_recognition.compare_faces(known_face_encodings, face_encoding)
name =
"Unknown"
# if match[0]:
# name = "michong"
# If a match was found in known_face_encodings, just use the first one.
if True in matches:
first_match_index = matches.index(True)
name = known_face_names[first_match_index]
face_names.append(name)
process_this_frame = not process_this_frame
# 將捕捉到的人臉顯示出來
for (top, right, bottom, left), name in zip(face_locations, face_names):
# Scale back up face locations since the frame we detected in was scaled to 1/4 size
top *= 4
right *= 4
bottom *= 4
left *= 4
# 矩形框
cv2.rectangle(frame, (left, top), (right, bottom), (0, 0, 255), 2)
#加上標籤
cv2.rectangle(frame, (left, bottom - 35), (right, bottom), (0, 0, 255), cv2.FILLED)
font = cv2.FONT_HERSHEY_DUPLEX
cv2.putText(frame, name, (left + 6, bottom - 6), font, 1.0, (255, 255, 255), 1)
# Display
cv2.imshow("monitor", frame)
# 按Q退出
if cv2.waitKey(1) & 0xFF == ord("q"):
break
video_capture.release()
cv2.destroyAllWindows()
5、boss文件夾
本開源項目,主要是結合攝像頭程序+極光推送,實現識別攝像頭中的人臉。並且通過極光推送平台給移動端發送消息!
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