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how to solve (-215:Assertion failed) !empty() in function 'cv::CascadeClassifier::detectMultiScale'

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please help me i got this error. --------------------------------------------------------------------------- error Traceback (most recent call last) in 19 20 rerect_size = cv2.resize(im, (im.shape[1] // rect_size, im.shape[0] // rect_size)) ---> 21 faces = haarcascade.detectMultiScale(rerect_size) 22 for f in faces: 23 (x, y, w, h) = [v * rect_size for v in f] error: OpenCV(4.4.0) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-9d_dfo3_\opencv\modules\objdetect\src\cascadedetect.cpp:1689: error: (-215:Assertion failed) !empty() in function 'cv::CascadeClassifier::detectMultiScale' this is my code import cv2 import numpy as np from tensorflow.keras.models import load_model model=load_model("E:\Data Science\Mask detector\model2-008.model") results={0:'without mask',1:'mask'} GR_dict={0:(0,0,255),1:(0,255,0)} rect_size = 4 cap = cv2.VideoCapture(0) haarcascade = cv2.CascadeClassifier('/home/user_name/.local/lib/python3.6/site-packages/cv2/data/haarcascade_frontalface_default.xml') while True: (rval, im) = cap.read() im=cv2.flip(im,1,1) rerect_size = cv2.resize(im, (im.shape[1] // rect_size, im.shape[0] // rect_size)) faces = haarcascade.detectMultiScale(rerect_size) for f in faces: (x, y, w, h) = [v * rect_size for v in f] face_img = im[y:y+h, x:x+w] rerect_sized=cv2.resize(face_img,(150,150)) normalized=rerect_sized/255.0 reshaped=np.reshape(normalized,(1,150,150,3)) reshaped = np.vstack([reshaped]) result=model.predict(reshaped) label=np.argmax(result,axis=1)[0] cv2.rectangle(im,(x,y),(x+w,y+h),GR_dict[label],2) cv2.rectangle(im,(x,y-40),(x+w,y),GR_dict[label],-1) cv2.putText(im, results[label], (x, y-10),cv2.FONT_HERSHEY_SIMPLEX,0.8,(255,255,255),2) cv2.imshow('LIVE', im) key = cv2.waitKey(10) if key == 27: break cap.release() cv2.destroyAllWindows()

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