The haarcascade_frontalface_default.xml file here is different from same file packaged by OpenCV (in /usr/share/OpenCV/haarcascades/haarcascade_frontalface_default.xml).
The size is smaller, but a diff does not say anything useful.

It would help to know if it is a different version, or has some improvements over the upstream, thanks.

File "face_detect.py", line 21, in
flags = cv2.CV_HAAR_SCALE_IMAGE AttributeError:
module 'cv2' has no attribute 'CV_HAAR_SCALE_IMAGE'

I've replaced it with cv2.CASCADE_SCALE_IMAGE and now it works like a charm !

Hi?
I am getting an error on running the command

Traceback (most recent call last):
File "face_detect.py", line 21, in
flags = cv2.cv.CV_HAAR_SCALE_IMAGE
AttributeError: 'module' object has no attribute 'cv'

font=cv2.cv.InitFont(cv2.cv.cv_FONT_HERSHEY_COMPLEX_SMALL,1,1,0,1)

when I write this the error of module 'cv2.cv2' has no attribute 'cv' come:(
help me plsssss

Hi,
I found your tutorial on https://realpython.com/face-recognition-with-python/ and was wondering if you have a license for this code? It was incredibly useful and I would like to use parts of it in a project I'm working on if possible.

hi,
I am so appreciate for your contribution of such a compressed and effective public code. But I have a warning about the confidentiality of our detect pictures because the html address used in the code. I'm sorry for that I don't familiar with the use of such html address.

Waitting for your replay~

thanks

When I try to execute the example i have this output :
cv2.error: OpenCV(4.2.0) ../modules/core/src/persistence.cpp:719: error: (-49:Unknown error code -49) Input file is invalid in function 'open'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "face.py", line 9, in <module>
    faceCascade = cv2.CascadeClassifier(cascPath)
SystemError: <class 'cv2.CascadeClassifier'> returned a result with an error set

How i can fix it?

i was running this script(live.py) and the i got this error:

cv2.error: OpenCV(4.1.1) /io/opencv/modules/objdetect/src/cascadedetect.cpp:1689: error: (-215:Assertion failed) !empty() in function 'detectMultiScale'

how can i solve this problem?
tnx for answers

Following the instructions I get error. Below is what I do on my Ubuntu:

git clone https://github.com/shantnu/FaceDetect
cd FaceDetect
python face_detect.py haarcascade_frontalface_default.xml

I get this error:

Traceback (most recent call last):
  File "face_detect.py", line 6, in <module>
    cascPath = sys.argv[2]
IndexError: list index out of range

Hi Shantnu ,

I am getting the error in face_detect.py

.cpp:1698: error: (-215) !empty() in function cv::CascadeClassifier::detectMultiScale

"
C:\work_office\hadoop\learning\Python\facedetection>
C:\work_office\hadoop\learning\Python\facedetection>python face_detect.py abba.png
libpng warning: iCCP: profile 'Photoshop ICC profile': 'GRAY': Gray color space not permitted on RGB PNG
OpenCV Error: Assertion failed (!empty()) in cv::CascadeClassifier::detectMultiScale, file C:\projects\opencv-python\opencv\modules\objdetect\src\cascadedetect.cpp, line 1698
Traceback (most recent call last):
File "face_detect.py", line 21, in
flags=cv2.CASCADE_SCALE_IMAGE
cv2.error: C:\projects\opencv-python\opencv\modules\objdetect\src\cascadedetect.cpp:1698: error: (-215) !empty() in function cv::CascadeClassifier::detectMultiScale
"

The "face_detect.py" file in the repo has been overwritten with an XML file. The prepackaged zip file containing all of the source seems to be okay.

in my python 3.7 on window 8 , and I have installed opencv-python through pip

I import cv2 and sys and everything.. But.. When it reaches imagePath = sys.argv[1] or
cascPath = sys.argv[2] It says:

list index out of range. !

I changed it to 0, and it passes, but then it tells me assertion error

for that line: gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

what's the solution?

OpenCV version: 4.5.3
Python Version:3.7
Windows 10

I installed opencv using cmake and visual studio and when I run python on cmd and type out the code:

import cv2
print(cv2.version)

I get this error:

Traceback (most recent call last):
File , line 1, in
AttributeError: module 'cv2' has no attribute 'version'

Edit: There are double underscores before and after version but I cant seem to see them in the post.

Seems to be a problem with the code itself. Your code may need to be fixed @shantnu

AttributeError Traceback (most recent call last)
in
19 minNeighbors=5,
20 minSize=(30, 30),
---> 21 flags = cv2.cv.CV_HAAR_SCALE_IMAGE
22 )
23

AttributeError: module 'cv2.cv2' has no attribute 'cv'

hello. how to recognize who's face it is with webcam? do i need to train this thing somehow for example for my mother's face, for father, for brother... or i can somehow do:

if face_of("father.jpg"):print("hello dad!")