16位图转8位图 （python）

import cv2
import numpy as np
import os
from PIL import Image

path=r"E:\AI_datas\3-16Bit\3"
save_path=r"E:\AI_datas\3-16Bit\4"
for name in os.listdir(path):
    if name.split('.')[-1]=='tif':
        new_path=os.path.join(path,name)
        uint16_img = cv2.imread(new_path,-1)
        #uint16_img1 = Image.open(new_path)
        #Image_p=Image.fromarray(uint16_img)
        uint16_img -= uint16_img.min()
        uint16_img = uint16_img / (uint16_img.max() - uint16_img.min())
        uint16_img *= 255
        new_uint16_img = uint16_img.astype(np.uint8)

        # M=cv2.getRotationMatrix2D((uint16_img.shape[0]/2,uint16_img.shape[1]/2),45,0.8)
        # uint16_img=cv2.warpAffine(uint16_img,M,(cols, rows))

        basename=name.split('.')[0]
        # uint16_img=Image.fromarray(uint16_img)
        # uint16_img.save(os.path.join(save_path,basename)+'.png')

        cv2.imwrite(os.path.join(save_path,basename)+'.bmp', uint16_img)
        print(os.path.join(save_path,name))
        # cv2.waitKey(0)