import numpy as npimport matplotlibimport os def img_seg(dir):  files = os.listdir(dir)  for file in files:    a, b = os.path.splitext(file)    img = Image.open(os.path.join(dir + "//" + file))    hight, width = img.size    w = 256    id = 1    i = 0    while (i + w <= hight):      j = 0      while (j + w <= width):        new_img = img.crop((i, j, i + w, j + w))        #rename = "D://labelme//images//"        rename = "D://labelme//annotations//"        new_img.save(rename + a + "_" + str(id) + b)        id += 1        j += w      i = i + w  if __name__ == '__main__':  #path = "D://labelme//data//images//train"  path = "D://labelme//data//dataset_png"  img_seg(path)