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TypeError: Expected Ptr for argument 'src'

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This is my code : import os from PIL import Image import numpy as np import cv2 import pickle Base_Dir = os.path.dirname(os.path.abspath("__file__")) image_dir = os.path.join(Base_Dir, "Images") face_cascade = cv2.CascadeClassifier('Cascades/haarcascade_frontalface_default.xml') recoganiser = cv2.face.LBPHFaceRecognizer_create() current_ID = 0 label_IDS = {} y_lebels = [] x_train = [] for root, dirs, files in os.walk(image_dir): for file in files: if(file.endswith("png") or file.endswith("jpg") or file.endswith("JPG")): path = os.path.join(root, file) label = os.path.basename(os.path.dirname(path)).replace(" ","_").lower() # print(label) # print(path) if not label in label_IDS: label_IDS[label]= current_ID current_ID+=1 id_ = label_IDS[label] x_train.append(path) #Verify the image and convert into gray and numpy array y_lebels.append(label) # some number for our labels pil_image = Image.open(path).convert('L') size = (600,600) final_image = pil_image.resize(size, Image.ANTIALIAS) image_array = np.array(pil_image, 'uint8') faces = face_cascade.detectMultiScale(image_array, 2, 7) for(x, y, w, h) in faces: roi = image_array[y:y+h, x:x+w] x_train.append(roi) y_lebels.append(id_) with open("lebels.pickle", "wb") as f: pickle.dump(label_IDS, f) recoganiser.train(x_train, np.array(y_lebels)) recoganiser.save("trainer.yml") And this is my error , what to do ? TypeError Traceback (most recent call last) in 52 pickle.dump(label_IDS, f) 53 ---> 54 recoganiser.train(x_train, np.array(y_lebels)) 55 recoganiser.save("trainer.yml") TypeError: Expected Ptr for argument 'src'

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