图片等比缩放

def resize_image(file_path, max_size):
    img = cv2.imread(file_path)
    file_up_path, file_ext = os.path.splitext(file_path)
    height, width, _ = img.shape
    new_img_path = f"{file_up_path}_resize{file_ext}"

    if max_size < width > height:
        new_img = cv2.resize(img, (4096, int(height * (4096 / width))))
        cv2.imwrite(new_img_path, new_img)
        return new_img_path
    if max_size < height > width:
        new_img = cv2.resize(img, (round(width * (4096 / height)), 4096))
        cv2.imwrite(new_img_path, new_img)
        return new_img_path

    return file_path