【发布时间】：2021-11-28 06:36:51
【问题描述】：
我尝试使用计算机视觉技术通过人脸识别来制作考勤系统。
Python Version: 3.8.10
代码如下，
import cv2
import numpy as np
import face_recognition
import os
path = 'attendanceImages'
images = []
classNames = []
myList = os.listdir(path)
print(myList)
for cl in myList:
curImg = cv2.imread(f"{path} / {cl}")
images.append(curImg)
classNames.append(os.path.splitext(cl)[0])
print(classNames)
def findEncodings(images):
encodeList = []
for img in images:
img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
encode = face_recognition.face_encodings(img)[0]
encodeList.append(encode)
return encodeList
encodeListKnown = findEncodings(images)
print(len(encodeListKnown)) ##--> It would be printed the length of dataset
注意：-print(len(encodeListKnown)) 打印后会显示长度，但错误会失败
下面给出了面临的错误，
Traceback (most recent call last):
File "/home/imdadul/PycharmProjects/faceVerification/AttendanceViaFace.py", line 25, in <module>
encodeListKnown = findEncodings(images)
File "/home/imdadul/PycharmProjects/faceVerification/AttendanceViaFace.py", line 20, in findEncodings
img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
cv2.error: OpenCV(4.5.2) /tmp/pip-req-build-sl2aelck/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'
['sohelRana.jpg', 'apurbo.jpg', 'RamCharan.jpg', 'ananyaPanday.jpg', 'imdadulHaque.jpg']
['sohelRana', 'apurbo', 'RamCharan', 'ananyaPanday', 'imdadulHaque']
Process finished with exit code 1
【问题讨论】：
-
您是否检查了正确加载的图像？您的 imread 路径构造看起来不正确。试试：
Path(os.path.abspath(path))/cl（与Path来自docs.python.org/3/library/…） -
@Tom 谢谢你的建议，已经解决了！
-
路径问题，再次。在您提问之前，请搜索您收到的错误消息。你会发现很多关于这个的现有问题，有些甚至有答案。
标签： python deep-learning computer-vision face-detection opencv-contrib