问题
I am trying to implement a facial recognition login system but I have an error "Operands could not be broadcast together with shapes (128,) (0,)" and I have no idea what or how can I solve it. Here are my view.py and facedetector.py that have been implemented and the error that I get from my server:
errors
Traceback (most recent call last):
File "C:\django-projects\lib\site packages\django\core\handlers\exception.py", line 34, in inner
response = get_response(request)
File "C:\django-projects\lib\site-packages\django\core\handlers\base.py",
line 126, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:\django-projects\lib\site-packages\django\core\handlers\base.py", line 124, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\django-projects\aps\aps_site\authenticate\views.py", line 54, in login_user
if facedect(user.userprofile.head_shot.url):
File "C:\django-projects\aps\aps_site\authenticate\views.py", line 37, in facedect
check=face_recognition.compare_faces(face_1_face_encoding, face_encodings)
File "C:\django-projects\lib\site-packages\face_recognition\api.py", line 222, in compare_faces
return list(face_distance(known_face_encodings, face_encoding_to_check) <= tolerance)
File "C:\django-projects\lib\site-packages\face_recognition\api.py", line 72, in face_distance
return np.linalg.norm(face_encodings - face_to_compare, axis=1)
ValueError: operands could not be broadcast together with shapes (128,) (0,)
views.py
from django.shortcuts import render, redirect
from django.contrib.auth import authenticate, login, logout,
update_session_auth_hash
from django.contrib.auth.forms import UserCreationForm, UserChangeForm, PasswordChangeForm
from django.contrib import messages
from .forms import SignUpForm, EditProfileForm
from django.urls import path, include
import os
import face_recognition
import cv2
# Create your views here.
def home(request):
return render(request, 'authenticate/home.html', {})
def facedect(loc):
cam = cv2.VideoCapture(0)
s, img = cam.read()
if s:
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
MEDIA_ROOT =os.path.join(BASE_DIR,'aps_site')
loc=(str(MEDIA_ROOT)+loc)
face_1_image = face_recognition.load_image_file(loc)
face_1_face_encoding = face_recognition.face_encodings(face_1_image)[0]
#
small_frame = cv2.resize(img, (0, 0), fx=0.25, fy=0.25)
rgb_small_frame = small_frame[:, :, ::-1]
face_locations = face_recognition.face_locations(rgb_small_frame)
face_encodings = face_recognition.face_encodings(rgb_small_frame, face_locations)
check=face_recognition.compare_faces(face_1_face_encoding, face_encodings)
print(check)
if check[0]:
return True
else :
return False
def login_user(request):
if request.method == 'POST':
username = request.POST['username']
password = request.POST['password']
user = authenticate(request, username=username,password=password)
if user is not None:
if facedect(user.userprofile.head_shot.url):
login(request, user)
messages.success(request,('You have successfully logged in!'))
return redirect('home')
else:
messages.success(request, ('Error logging in!-Please try again'))
return redirect('login')
else:
return render(request, 'authenticate/login.html', {})
def logout_user(request):
logout(request)
messages.success(request, ('You have been logged out!'))
return redirect('login')
def register_user(request):
if request.method == 'POST':
form = SignUpForm(request.POST)
if form.is_valid():
form.save()
username = form.cleaned_data['username']
password = form.cleaned_data['password1']
user = authenticate(username = username, password = password)
login(request, user)
messages.success(request, ('You have registered...'))
return redirect('home')
else:
form = SignUpForm()
context = {'form' : form}
return render(request, 'authenticate/register.html', context)
def edit_profile(request):
if request.method == 'POST':
form = EditProfileForm(request.POST, instance=request.user)
if form.is_valid():
form.save()
messages.success(request, ('You have edited your profile...'))
return redirect('home')
else:
form = EditProfileForm(instance=request.user) #
context = {'form' : form}
return render(request, 'authenticate/edit_profile.html', context)
def change_password(request):
if request.method == 'POST':
form = PasswordChangeForm(data=request.POST, user=request.user)
if form.is_valid():
form.save()
update_session_auth_hash(request, form.user)
messages.success(request, ('You have changed your password...'))
return redirect('home')
else:
form = PasswordChangeForm(user=request.user) #
context = {'form' : form}
return render(request, 'authenticate/change_password.html', context)
facedetector.py
import os
from django.urls import path, include
import face_recognition
import cv2
from PIL import Image #?
#initialize the camera
def facedect(loc):
cam = cv2.VideoCapture(0) # 0 -> index of camera
s, img = cam.read()
if s:
# frame captured without any errors
cv2.namedWindow("image_test")
cv2.imshow("image_test",img)
#cv2.waitKey(0) # waits until a key is pressed
cv2.destroyWindow("image_test")
cv2.imwrite("captured-image.png",img) #to save the captured image to the directory file
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
MEDIA_ROOT =os.path.join(BASE_DIR,'aps_site')
print(MEDIA_ROOT,loc)
loc=(str(MEDIA_ROOT)+loc)
print(loc)
print("C:\django-projects\aps\aps_site\aps_site\media\profile_images")
face_1_image = face_recognition.load_image_file(loc)
face_1_face_encoding = face_recognition.face_encodings(face_1_image)[0]
small_frame = cv2.resize(img, (0, 0), fx=0.25, fy=0.25)
rgb_small_frame = small_frame[:, :, ::-1]
face_locations = face_recognition.face_locations(rgb_small_frame)
face_encodings = face_recognition.face_encodings(rgb_small_frame, face_locations)
check=face_recognition.compare_faces(face_1_face_encoding, face_encodings)
print(check)
if check[0]:
return True
else :
return False
facedect('C:\media\profile_images')
回答1:
The first argument for face_recognition.compare_faces function should be a list as stated in the documentation. Change your django-projects\aps\aps_site\authenticate\views.py line 37 to:
check=face_recognition.compare_faces([face_1_face_encoding], face_encodings)
To solve the cause of the exception.
来源：https://stackoverflow.com/questions/55621789/operands-could-not-be-broadcast-together-with-shapes-128-0-error