python实现批量按比例缩放图片效果_Python

本文实例为大家分享了python实现批量按比例缩放图片的具体代码，供大家参考，具体内容如下

把脚本文件放在要缩放的文件夹下面。

双击运行脚本,输入要缩放的系数。脚本会在当前目录下创建一个scaledImg_xxxx文件夹,如果已经存在，会强制删除，如果删除失败会提示手动删除这个文件夹，再双击运行就可以了。

resizeImg.py

									#!/usr/bin/python 

									# -*- coding:utf8 -*- 

									#author@skillart www. 

									import os 

									import shutil 

									import Image  

									to_scale = 0.5

									processIndex = 0

									def resizeImg(imgPath): 

									  global processIndex 

									  fileList = [] 

									  files = os.listdir(imgPath) 

									  for f in files: 

									    filePath = imgPath + os.sep + f 

									    if(os.path.isfile(filePath)): 

									      fileList.append(f) 

									    elif(os.path.isdir(filePath)): 

									      resizeImg(filePath) 

									  for fileName in fileList: 

									    processIndex+=1

									    fileFullName = imgPath+os.sep+fileName 

									    suffix = fileName[fileName.rfind('.'):] 

									    if(suffix == '.png' or suffix == '.jpg'): 

									      print 'processing the '+str(processIndex)+'th file:'+fileFullName 

									      img = Image.open(fileFullName) 

									      w,h = img.size 

									      tw = int(w * to_scale) 

									      th = int(h * to_scale) 

									      reImg = img.resize((tw,th),Image.ANTIALIAS) 

									      reImg.save(fileFullName) 

									      del reImg 

									if __name__ == '__main__': 

									  scaleStr = raw_input('input to_scale: ') 

									  to_scale = float(scaleStr) 

									  scaledPath = '.\\scaledImg_xxxx'; 

									  if os.path.isdir(scaledPath): 

									    flag = raw_input('the output dir is exist, sure to del it(y/n)') 

									    if flag == 'y' or flag == 'yes': 

									      try:   

									        shutil.rmtree(scaledPath) 

									      finally: 

									        raw_input('remove dir failed , please removed the dir manually.') 

									    else: 

									      exit 

									  shutil.copytree('.\\',scaledPath)   

									  resizeImg(scaledPath) 

									  raw_input("resize success")

生成Icon

generateIcon.py

									#!/usr/bin/python 

									# -*- coding:utf8 -*- 

									#author@skillart www. 

									import os 

									import shutil 

									import Image  

									def resizeImg(imgPathName): 

									  print imgPathName 

									  iconDict = {'Icon.png':'72x72','Icon@2x.png':'144x144','Icon-29.png':'29x29','Icon-40.png':'40x40','Icon-50.png':'50x50', 

									  'Icon-57.png':'57x57', 'Icon-58.png':'58x58','Icon-72.png':'72x72','Icon-76.png':'76x76','Icon-80.png':'80x80', 

									  'Icon-100.png':'100x100','Icon-114.png':'114x114','Icon-120.png':'120x120','Icon-144.png':'144x144','Icon-152.png':'152x152', 

									  'FlipCycleTileLarge.png':'300x300','FlipCycleTileMedium.png':'300x300','FlipCycleTileSmall.png':'300x300', 

									  'IconicTileMediumLarge.png':'300x300','IconicTileSmall.png':'300x300','ApplicationIcon.png':'300x300','icon.png':'72x72'} 

									  if os.path.isfile(imgPathName) == False: 

									    print('open imgPathName failed , check the' + imgPathName + "is exist!") 

									    exit 

									  img = Image.open(imgPathName) 

									  index = imgPathName.rfind(os.sep) 

									  prefix = imgPathName[:index+1] 

									  for key, value in iconDict.items(): 

									    # print key,value 

									    v_split = value.split('x') 

									    w,h = int(v_split[0]),int(v_split[1]) 

									    fileName = prefix + key 

									    reImg = img.resize((w,h),Image.ANTIALIAS) 

									    reImg.save(fileName) 

									    print fileName,w,h 

									  del img 

									if __name__ == '__main__': 

									  scaledPath = '.\\createIcon'

									  if os.path.isdir(scaledPath): 

									    flag = raw_input('the output dir is exist, sure to del it(y/n)') 

									    if flag == 'y' or flag == 'yes': 

									      try:   

									        shutil.rmtree(scaledPath) 

									      finally: 

									        raw_input('remove dir failed , please removed the dir manually.') 

									    else: 

									      exit 

									  shutil.copytree('.\\',scaledPath)  

									  fileList = [] 

									  files = os.listdir(scaledPath) 

									  for f in files: 

									    filePath = scaledPath + os.sep + f 

									    if os.path.isfile(filePath) : 

									      suffix = filePath[filePath.rfind('.'):] 

									      if(suffix == '.png' or suffix == '.jpg'): 

									        print filePath 

									        resizeImg(filePath) 

									        break

									  raw_input("resize success")