python增加图像对比度的方法

# -*- coding: UTF-8 -*-
from PIL import Image
from PIL import ImageEnhance
import PIL.Image as img
from PIL import ImageEnhance
import os
 
def rotationImage(filepath,destpath):
 count = 0
 filelist=os.listdir(filepath) #所有文件的文件名
 total_num=len(filelist) #所有文件的个数
 print(total_num) #输出文件个数
 for i in range(total_num): #对每张图像进行操作
  print(count)
  im=img.open(filepath+str(i+21)+str("_training")+".gif")
  for j in range(72):
   im_rotate=im.rotate(j*10) #每张图像都10°旋转一次
   #然后对其增加亮度对比度等操作
 
   enh_con=ImageEnhance.Contrast(im_rotate) #增加对比度 得到1440张
   image_contrasted=enh_con.enhance(1.5)
   image_contrasted.save(destpath + str("cont_") + str((j + 1) * 10) + str("_") + str(i + 21) + str("_") + str("manual1") + '.gif')
   count=count+1
   # enh_sha=ImageEnhance.Sharpness(im_rotate) #增加锐度
   # image_sharped=enh_sha.enhance(3.0)
   # image_sharped.save(destpath + str("sharp_") + str((j + 1) * 10) + str("_") + str(i + 21) + str("_") + str("training") + '.tif')
 
   # enh_bri=ImageEnhance.Brightness(im_rotate) #增加亮度 但是有问题
   # image_bright=enh_bri.enhance(1.5)
   # image_bright.save(destpath + str("bri_") + str((j + 1) * 10) + str("_") + str(i + 21) + str("_") + str("training") + '.tif')
 
   # enh_col=ImageEnhance.Color(im_rotate) #增加色度 但是有问题,
   # image_colored=enh_col.enhance(1.5)
   # image_colored.save(destpath + str("col_") + str((j + 1) * 10) + str("_") + str(i + 21) + str("_") + str("training") + '.tif')
 
  j=0
 
if __name__== '__main__':
 filepath='/home/qxq/Desktop/eyedata_final/train/label/gif/orginal/'
 destpath='/home/qxq/Desktop/eyedata_final/train/label/gif/brighten/'
 rotationImage(filepath,destpath)

# -*- coding: UTF-8 -*-
from PIL import Image
from PIL import ImageEnhance
import os
 
rootdir = r'/home/qxq/Desktop/eyedata_final/mask/original/' # 指明被遍历的文件夹
for parent, dirnames, filenames in os.walk(rootdir):
 for filename in filenames:
  currentPath = os.path.join(parent, filename)
  im = Image.open(currentPath)
  for j in range(72):
   im_rotate = im.rotate(j * 10) # 每张图像都10°旋转一次
 
   enh_con = ImageEnhance.Contrast(im_rotate) # 增加对比度 得到1440张(20*72=1440)
   image_contrasted = enh_con.enhance(1.5)
   newname1 = r"/home/qxq/Desktop/eyedata_final/mask/brighten/" + 'Cont_' + filename
   image_contrasted.save(newname1)
 
   enh_sha = ImageEnhance.Sharpness(im_rotate) # 增加锐度
   image_sharped = enh_sha.enhance(3.0)
   newname2 = r"/home/qxq/Desktop/eyedata_final/mask/brighten/" + 'sharp_' + filename
   image_contrasted.save(newname2)
 
   #
   enh_bri = ImageEnhance.Brightness(im_rotate) # 增加亮度 但是有问题
   image_bright = enh_bri.enhance(1.5)
   newname3 = r"/home/qxq/Desktop/eyedata_final/mask/brighten/" + 'Bri_' + filename
   image_contrasted.save(newname3)
 
   #
   enh_col = ImageEnhance.Color(im_rotate) # 增加色度 但是有问题,
   image_colored = enh_col.enhance(1.5)
   newname4 = r"/home/qxq/Desktop/eyedata_final/mask/brighten/" + 'Col_' + filename
   image_contrasted.save(newname4)
 
 
  j = 0