opencv_functions.py 文件源码

def addEmoji(img,faces,emoji):
  for x,y,w,h in faces:
    # Resize emoji to desired width and height
    dim = max(w,h)
    em = cv.resize(emoji, (dim,dim), interpolation = cv.INTER_CUBIC)

    # Get boolean for transparency
    trans = em.copy()
    trans[em == 0] = 1
    trans[em != 0] = 0

    # Delete all pixels in image where emoji is nonzero
    img[y:y+h,x:x+w,:] *= trans

    # Add emoji on those pixels
    img[y:y+h,x:x+w,:] += em

  return img

# Add emojis to image at specified points and sizes
# Inputs: img is ndarrays of WxHx3
#         emojis is a list of WxHx3 emoji arrays
#         faces is a list of (x,y,w,h) tuples for each face to be replaced
#         Labels is a list of integer labels for each emotion