def resize_to(img, targ_sz: int, use_min: bool=False):
    """Size to resize to, to hit `targ_sz` at same aspect ratio, in PIL coords (i.e w*h)"""
    w, h = img.size
    min_sz = (min if use_min else max)(w, h)
    ratio = targ_sz / min_sz
    return int(w * ratio), int(h * ratio)
