Python之修改图片像素值的方法

# -*- coding:utf8 -*-import os from PIL import Imageim = Image.open('123.png')#打开图片pix = im.load()#导入像素width = im.size[0]#获取宽度height = im.size[1]#获取长度 for x in range(width):  for y in range(height):    r,g,b,a = im.getpixel((x,y))	    rgba=(r,g,b,a)    if(a==0):      im.putpixel((x,y),(0,0,0,0))    if(a==255):      im.putpixel((x,y),(255,255,255,255)) im = im.convert('RGB')im.save('456.png')

# -*- coding:utf8 -*-import osfrom PIL import Image path = 'SegmentationClass(RGBA)/'savedpath = 'SegmentationClass/'filelist = os.listdir(path)for item in filelist:  im = Image.open( path + item )#打开图片  width = im.size[0]#获取宽度  height = im.size[1]#获取长度   for x in range(width):    for y in range(height):      r,g,b,a = im.getpixel((x,y))	      if(a==0):        im.putpixel((x,y),(0,0,0,0))      if(a==255):        im.putpixel((x,y),(255,255,255,255))  im = im.convert('RGB')  im.save(savedpath + item)  print('item of %s is saved '%(item))