python实现批量图片格式转换的方法

# 将jpg格式转位png 
import os 
from PIL import Image 
import shutil 
import sys 
 
# Define the input and output image 
output_dirHR = '../data/Mosaic_HR/' 
output_dirLR = '../data/Mosaic_LR/' 
if not os.path.exists(output_dirHR): 
 os.mkdir(output_dirHR) 
if not os.path.exists(output_dirLR): 
 os.mkdir(output_dirLR) 
 
 
 
def image2png(dataset_dir,type): 
 files = [] 
 image_list = os.listdir(dataset_dir) 
 files = [os.path.join(dataset_dir, _) for _ in image_list] 
 for index,jpg in enumerate(files): 
  if index > 100000: 
   break 
  try: 
   sys.stdout.write('\r>>Converting image %d/100000 ' % (index)) 
   sys.stdout.flush() 
   im = Image.open(jpg) 
   png = os.path.splitext(jpg)[0] + "." + type 
   im.save(png) 
   # 将已经转换的图片移动到指定位置 
   ''''' 
   if jpg.split('.')[-1] == 'jpg': 
    shutil.move(png,output_dirLR) 
   else: 
    shutil.move(png,output_dirHR) 
   ''' 
   shutil.move(png, output_dirHR) 
  except IOError as e: 
   print('could not read:',jpg) 
   print('error:',e) 
   print('skip it\n') 
 
 sys.stdout.write('Convert Over!\n') 
 sys.stdout.flush() 
 
 
 
if __name__ == "__main__": 
 current_dir = os.getcwd() 
 print(current_dir) # /Users/gavin/PycharmProjects/pygame 
 data_dir = '/home/gavin/MyProject/python/nesunai_faces/' 
 
 image2png(data_dir,'png')