python 批量图片灰度转换，图片大小，不改变名字

from skimage import io,color，transform
import PIL.Image
import numpy as np
import os
import string
def convert_gray(f):
rgb=io.imread(f)
gray=color.rgb2gray(rgb)
#dst=transform.resize(gray,(111,256))
#转化图像
return gray
datapath = ‘C:/Users/Administrator/Desktop/JPEGImage’
dirName = “C:/Users/Administrator/Desktop/JPEGImage/”
li = os.listdir(dirName)
str=datapath+’/*.jpg’
coll = io.ImageCollection(str,load_func=convert_gray)
i = 0
for filename in li:
io.imsave(r’F:/a/’+np.str(filename)+’.jpg’,coll[i]) #循环保存图片
i += 1