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why cv2 has no attribute destroyAllWindows?

  • Thread starter Thread starter dumbN00b
  • Start date Start date
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dumbN00b

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I trying to write a program for face recognition using opencv. This is the code in a file called facerec.py,

Code:
#!/usr/bin/env python

import cv2
import face_recognition
import os
import numpy as np
from datetime import datetime
import pickle
import re

def MainFunc():

    path = './student_images' #specify the path to the directory containing student images
    images = []
    className = []
    usnNum = []

    mylist = os.listdir(path) #get a list of image files in the specified directory

    #loop through each image file in the directory
    for cl in mylist:
        curImg = cv2.imread(f'{path}/{cl}') #read the image file
        images.append(curImg)
        Fname_ext = os.path.splitext(cl)[0] #extract the class name (student's name) from the file name without the extension
        Fname = re.split('_', Fname_ext)
        className.append(Fname[0]) #append the Name
        usnNum.append(Fname[1]) #append the USN

        #className.append(os.path.splitext(cl)[0]) #extract the class name (student's name) from the file name without the extension

    #define a function to find face encodings from a list of images
    def findEncodings(images):
        encodeList = []
        for img in images:
            img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB) #convert the images from BGR format to RGB format (required by face_recognition)
            encoded_face = face_recognition.face_encodings(img)[0] #encode the face in the image
            encodeList.append(encoded_face)
        return encodeList

    encoded_face_train = findEncodings(images) #get the face encodings for the known student images

    #define a function to mark attendance
    def markAttendance(name,usn):
        with open('Attendance.csv', 'r+') as f: #open the attendance csv file in the read and write mode
            myDataList = f.readlines()
            nameList = []

            for line in myDataList: #extract existing names from the csv file
                entry = line.split(',')
                nameList.append(entry[0])

            if name not in nameList: #if the name is not in the csv file, add a new entry with the current time and date
                now = datetime.now()
                time = now.strftime('%I:%M:%S %p')
                date = now.strftime('%d-%B-%Y')
                f.writelines(f'\n{name}, {usn}, {time}, {date}')

    cap = cv2.VideoCapture(0) #open the webcam (camera)

    while True:
        success, img = cap.read() #capture a frame from the webcam
        imgS = cv2.resize(img, (0,0), None, 0.25, 0.25) #resize the captured frame to 1/4 of its original size for faster processing
        imgS = cv2.cvtColor(imgS, cv2.COLOR_BGR2RGB) #covert the resized frame from bgr to rgb format
        faces_in_frame = face_recognition.face_locations(imgS) #detect faces in the resized frame
        encoded_faces = face_recognition.face_encodings(imgS, faces_in_frame) #encode the detected faces

        for encoded_face, faceloc in zip(encoded_faces, faces_in_frame): #loop through each detected face in the frame
            matches = face_recognition.compare_faces(encoded_face_train, encoded_face) #compare the detected face with known faces
            faceDist = face_recognition.face_distance(encoded_face_train, encoded_face) #calculate the face distance to find the best match
            matchIndex = np.argmin(faceDist)

            if matches[matchIndex]: #if a match is found, mark attendance and display the name
                name = className[matchIndex].upper().lower()
                usn = usnNum[matchIndex].upper().lower()
                y1, x2, y2, x1 = faceloc
                y1, x2, y2, x1 = y1 * 4, x2 * 4, y2 * 4, x1 * 4 #scale coordinates back to original size
                cv2.rectangle(img, (x1, y1), (x2, y2), (255, 0, 0), 2) #draw a rectangle around the detected face
                cv2.rectangle(img, (x1, y2 - 35), (x2, y2), (255, 0, 0), cv2.FILLED) #draw a filled rectangle for displaying the name
                cv2.putText(img, name, (x1 + 6, y2 - 5), cv2.FONT_HERSHEY_COMPLEX, 1, (255,255,255), 2) #display the name on the frame
                markAttendance(name,usn) #call the markAttendacne function to record attendance

        cv2.imshow('webcam', img) #display the frame with detected faces and names

        if cv2.waitKey(1) & 0xFF == ord('q'):
            print("Q hit, closing...")
            break

        cap.release()
        cv2.destoryAllWindows()

if __name__ == '__main__':
    MainFunc()

The error that i am getting is,

Code:
Traceback (most recent call last):
  File "facerec.py", line 97, in <module>
    MainFunc()
  File "facerec.py", line 94, in MainFunc
    cv2.destoryAllWindows()
    ^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'cv2' has no attribute 'destoryAllWindows'

I am running this in a virtual environment and the packages installed are,

Code:
Package                 Version
----------------------- ---------
click                   8.1.7
dlib                    19.24.4
face-recognition        1.3.0
face_recognition_models 0.3.0
greenlet                3.0.3
msgpack                 1.0.8
numpy                   1.26.4
opencv-python           4.10.0.82
packaging               24.1
pillow                  10.3.0
pip                     24.0
setuptools              70.0.0

This is what I have tried to do, since I couldn't look up much about it on google, I commented the cv2.destroyAllWindows() but now there is a error like,

Code:
Traceback (most recent call last):
  File "facerec.py", line 102, in <module>
    MainFunc()
  File "facerec.py", line 67, in MainFunc
    imgS = cv2.resize(img, (0,0), None, 0.25, 0.25) #resize the captured frame to 1/4 of its original size for faster processing
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cv2.error: OpenCV(4.10.0) /io/opencv/modules/imgproc/src/resize.cpp:4152: error: (-215:Assertion failed) !ssize.empty() in function 'resize'

I tried following the answers from the previously asked question without any success. I am running the program on Linux, the code was working well before a reboot, I can't figure out what changed. Any help is much appreciated.
<p>I trying to write a program for face recognition using opencv. This is the code in a file called <code>facerec.py</code>,</p>
<pre><code>#!/usr/bin/env python

import cv2
import face_recognition
import os
import numpy as np
from datetime import datetime
import pickle
import re

def MainFunc():

path = './student_images' #specify the path to the directory containing student images
images = []
className = []
usnNum = []

mylist = os.listdir(path) #get a list of image files in the specified directory

#loop through each image file in the directory
for cl in mylist:
curImg = cv2.imread(f'{path}/{cl}') #read the image file
images.append(curImg)
Fname_ext = os.path.splitext(cl)[0] #extract the class name (student's name) from the file name without the extension
Fname = re.split('_', Fname_ext)
className.append(Fname[0]) #append the Name
usnNum.append(Fname[1]) #append the USN

#className.append(os.path.splitext(cl)[0]) #extract the class name (student's name) from the file name without the extension

#define a function to find face encodings from a list of images
def findEncodings(images):
encodeList = []
for img in images:
img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB) #convert the images from BGR format to RGB format (required by face_recognition)
encoded_face = face_recognition.face_encodings(img)[0] #encode the face in the image
encodeList.append(encoded_face)
return encodeList

encoded_face_train = findEncodings(images) #get the face encodings for the known student images

#define a function to mark attendance
def markAttendance(name,usn):
with open('Attendance.csv', 'r+') as f: #open the attendance csv file in the read and write mode
myDataList = f.readlines()
nameList = []

for line in myDataList: #extract existing names from the csv file
entry = line.split(',')
nameList.append(entry[0])

if name not in nameList: #if the name is not in the csv file, add a new entry with the current time and date
now = datetime.now()
time = now.strftime('%I:%M:%S %p')
date = now.strftime('%d-%B-%Y')
f.writelines(f'\n{name}, {usn}, {time}, {date}')

cap = cv2.VideoCapture(0) #open the webcam (camera)

while True:
success, img = cap.read() #capture a frame from the webcam
imgS = cv2.resize(img, (0,0), None, 0.25, 0.25) #resize the captured frame to 1/4 of its original size for faster processing
imgS = cv2.cvtColor(imgS, cv2.COLOR_BGR2RGB) #covert the resized frame from bgr to rgb format
faces_in_frame = face_recognition.face_locations(imgS) #detect faces in the resized frame
encoded_faces = face_recognition.face_encodings(imgS, faces_in_frame) #encode the detected faces

for encoded_face, faceloc in zip(encoded_faces, faces_in_frame): #loop through each detected face in the frame
matches = face_recognition.compare_faces(encoded_face_train, encoded_face) #compare the detected face with known faces
faceDist = face_recognition.face_distance(encoded_face_train, encoded_face) #calculate the face distance to find the best match
matchIndex = np.argmin(faceDist)

if matches[matchIndex]: #if a match is found, mark attendance and display the name
name = className[matchIndex].upper().lower()
usn = usnNum[matchIndex].upper().lower()
y1, x2, y2, x1 = faceloc
y1, x2, y2, x1 = y1 * 4, x2 * 4, y2 * 4, x1 * 4 #scale coordinates back to original size
cv2.rectangle(img, (x1, y1), (x2, y2), (255, 0, 0), 2) #draw a rectangle around the detected face
cv2.rectangle(img, (x1, y2 - 35), (x2, y2), (255, 0, 0), cv2.FILLED) #draw a filled rectangle for displaying the name
cv2.putText(img, name, (x1 + 6, y2 - 5), cv2.FONT_HERSHEY_COMPLEX, 1, (255,255,255), 2) #display the name on the frame
markAttendance(name,usn) #call the markAttendacne function to record attendance

cv2.imshow('webcam', img) #display the frame with detected faces and names

if cv2.waitKey(1) & 0xFF == ord('q'):
print("Q hit, closing...")
break

cap.release()
cv2.destoryAllWindows()

if __name__ == '__main__':
MainFunc()

</code></pre>
<p>The error that i am getting is,</p>
<pre><code>Traceback (most recent call last):
File "facerec.py", line 97, in <module>
MainFunc()
File "facerec.py", line 94, in MainFunc
cv2.destoryAllWindows()
^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'cv2' has no attribute 'destoryAllWindows'
</code></pre>
<p>I am running this in a virtual environment and the packages installed are,</p>
<pre><code>Package Version
----------------------- ---------
click 8.1.7
dlib 19.24.4
face-recognition 1.3.0
face_recognition_models 0.3.0
greenlet 3.0.3
msgpack 1.0.8
numpy 1.26.4
opencv-python 4.10.0.82
packaging 24.1
pillow 10.3.0
pip 24.0
setuptools 70.0.0
</code></pre>
<p>This is what I have tried to do, since I couldn't look up much about it on google, I commented the <code>cv2.destroyAllWindows()</code> but now there is a error like,</p>
<pre><code>Traceback (most recent call last):
File "facerec.py", line 102, in <module>
MainFunc()
File "facerec.py", line 67, in MainFunc
imgS = cv2.resize(img, (0,0), None, 0.25, 0.25) #resize the captured frame to 1/4 of its original size for faster processing
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
cv2.error: OpenCV(4.10.0) /io/opencv/modules/imgproc/src/resize.cpp:4152: error: (-215:Assertion failed) !ssize.empty() in function 'resize'
</code></pre>
<p>I tried following the answers from the <a href="https://stackoverflow.com/questions...r-215assertion-failed-ssize-empty-in-function">previously asked question</a> without any success. I am running the program on Linux, the code was working well before a reboot, I can't figure out what changed. Any help is much appreciated.</p>
 

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