face detection and emotion recognition
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采用开源face_recognition库进行人脸检测，并结合由VGG训练并保存的情绪识别模型进行调用，仅实现了基础功能，系统运行速度仍需进一步优化。
import face_recognition
import cv2
import numpy as np
from keras.models import load_model
def img_face_dectect(img):
# img = face_recognition.load_image_file(img)
face_locations = face_recognition.face_locations(img)
# print(type(face_locations))
# print(face_locations)
# cv2.imshow(face_locations)
for (top, right, bottom, left) in face_locations:
# top *= 4
# right *= 4
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