OpenCV(4.5.4) error: (-5:Bad argument) in function 'train'

[Abdallahdameri]

System Information

hi im getting an error in the face training code
how can i slove it

Detailed description

Traceback (most recent call last):
File "/home/pi/Downloads/OpenCV-Face-Recognition-master/FacialRecognition/02_face_training.py", line 49, in
recognizer.train(faces,np.array(ids))
cv2.error: OpenCV(4.5.4) 👎 error: (-5:Bad argument) in function 'train'

Overload resolution failed:

• Can't parse 'src'. Sequence item with index 0 has a wrong type
• Can't parse 'src'. Sequence item with index 0 has a wrong type

Steps to reproduce

import cv2
import numpy as np
from PIL import Image
import os

Path for face image database

path = '/home/pi/Downloads/OpenCV-Face-Recognition-master/FacialRecognition/dataset'

recognizer = cv2.face.LBPHFaceRecognizer_create()

detector = cv2.CascadeClassifier("/home/pi/Downloads/OpenCV-Face-Recognition-master/FacialRecognition/haarcascade_frontalface_default.xml");

function to get the images and label data

def getImagesAndLabels(path):

imagePaths = [os.path.join(path,f) for f in os.listdir(path)]     
faceSamples=['mohammad']
ids = []

for imagePath in imagePaths:

    PIL_img = Image.open(imagePath).convert('L') # convert it to grayscale
    img_numpy = np.array(PIL_img,'uint8')

    id = int(os.path.split(imagePath)[-1].split(".")[1])
    faces = detector.detectMultiScale(img_numpy)

    for (x,y,w,h) in faces:
        faceSamples.append(img_numpy[y:y+h,x:x+w])
        ids.append(id)

return faceSamples,ids

print ("\n [INFO] Training faces. It will take a few seconds. Wait ...")
faces,ids = getImagesAndLabels(path)
print(faces)
recognizer.train(faces,np.array(ids))

Save the model into trainer/trainer.yml

recognizer.write('/home/pi/Downloads/OpenCV-Face-Recognition-master/FacialRecognition/trainer')

recognizer.save() worked on Mac, but not on Pi

Print the numer of faces trained and end program

print("\n [INFO] {0} faces trained. Exiting Program".format(len(np.unique(ids))))

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files (videos, images, onnx, etc)

[krrishdholakia]

What is the type of the items in the 'faces' sequence? - Clerkie (https://clerkie.co/)