img_tools.py 文件源码

def standard_resize(image, max_side):
    if image is None:
        return None, None, None
    original_h, original_w, _ = image.shape
    if all(side < max_side for side in [original_h, original_w]):
        return image, original_h, original_w
    aspect_ratio = float(np.amax((original_w, original_h)) / float(np.amin((original_h, original_w))))

    if original_w >= original_h:
        new_w = max_side
        new_h = max_side / aspect_ratio
    else:
        new_h = max_side
        new_w = max_side / aspect_ratio

    new_h = int(new_h)
    new_w = int(new_w)
    resized_image = cv2.resize(image, (new_w, new_h))
    return resized_image, new_w, new_h