python实现批量按比例缩放图片效果


            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") 



以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持中文源码网。