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# author: Arun Ponnusamy
# website: https://www.arunponnusamy.com

# import necessary packages
from keras.preprocessing.image import img_to_array
from keras.models import load_model
from keras.utils import get_file
import numpy as np
import random
import argparse
import cv2
import os
import cvlib as cv

# download pre-trained model file (one-time download)
dwnld_link = "https://github.com/arunponnusamy/cvlib/releases/download/v0.2.0/gender_detection.model"
model_path = get_file("gender_detection.model", dwnld_link,
                      cache_subdir="pre-trained", cache_dir=os.getcwd())

# load model
model = load_model(model_path)

# open webcam
webcam = cv2.VideoCapture(0)

if not webcam.isOpened():
    print("Could not open webcam")
    exit()

classes = ['man', 'woman']

# loop through frames
while webcam.isOpened():

# read frame from webcam
    status, frame = webcam.read()

if not status:
        print("Could not read frame")
        exit()

# apply face detection
    face, confidence = cv.detect_face(frame)

print(face)
    print(confidence)

# loop through detected faces
    for idx, f in enumerate(face):

# get corner points of face rectangle
        (startX, startY) = f[0], f[1]
        (endX, endY) = f[2], f[3]

# draw rectangle over face
        cv2.rectangle(frame, (startX, startY), (endX, endY), (0, 255, 0), 2)

# crop the detected face region
        face_crop = np.copy(frame[startY:endY, startX:endX])

if (face_crop.shape[0]) < 10 or (face_crop.shape[1]) < 10:
            continue

# preprocessing for gender detection model
        face_crop = cv2.resize(face_crop, (96, 96))
        face_crop = face_crop.astype("float") / 255.0
        face_crop = img_to_array(face_crop)
        face_crop = np.expand_dims(face_crop, axis=0)

# apply gender detection on face
        conf = model.predict(face_crop)[0]
        print(conf)
        print(classes)

# get label with max accuracy
        idx = np.argmax(conf)
        label = classes[idx]
        label = "{}: {:.2f}%".format(label, conf[idx] * 100)
        
        # [ADS source]
        adsman = [r'D:\ads\man\man1.jpg', r'D:\ads\man\man2.jpg', r'D:\ads\man\man3.jpg']
        adswoman = [r'D:\ads\woman\woman1.jpg', r'D:\ads\woman\woman2.jpg', r'D:\ads\woman\woman3.jpg']

if label == 'man':
            random.shuffle(adsman)
            path = adsman[0]
            image = cv2.imread(path)
        else:
            random.shuffle(adswoman)
            path = adswoman[0]
            image = cv2.imread(path)

Y = startY - 10 if startY - 10 > 10 else startY + 10

# write label and confidence above face rectangle
        cv2.putText(frame, label, (startX, Y), cv2.FONT_HERSHEY_SIMPLEX,
                    0.7, (0, 255, 0), 2)
        
        # display output
        cv2.imshow("ads.jpg", image)
    
# press "Q" to stop
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# release resources
webcam.release()
cv2.destroyAllWindows()

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