code: def imdecode(str_img, flag=1):
      
      hdl = NDArrayHandle()
      check_call(_LIB.MXCVImdecode(ctypes.c_char_p(str_img),
                                   mx_uint(len(str_img)),
                                   flag, ctypes.byref(hdl)))
      return mx.nd.NDArray(hdl)
docs: Decode image from str buffer.
      Wrapper for cv2.imdecode that uses mx.nd.NDArray
  
      Parameters
      ----------
      str_img : str
          str buffer read from image file
      flag : int
          same as flag for cv2.imdecode
      Returns
      -------
      img : NDArray
          decoded image in (width, height, channels)
          with BGR color channel order