examples/research_projects/lxmert/utils.py/img_tensorize
def img_tensorize(im, input_format="RGB"):
    assert isinstance(im, str)
    if os.path.isfile(im):
        img = cv2.imread(im)
    else:
        img = get_image_from_url(im)
        assert img is not None, f"could not connect to: {im}"
    img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
    if input_format == "RGB":
        img = img[:, :, ::-1]
    return img