Python实现图片尺寸缩放脚本


            最近由于网站对图片尺寸的需要，用python写了个小脚本，方便进行图片尺寸的一些调整，特记录如下：





# coding=utf-8 

import Image 

import shutil 

import os 

 

 

class Graphics: 

 infile = 'D:\\myimg.jpg' 

 outfile = 'D:\\adjust_img.jpg' 

 

 @classmethod 

 def fixed_size(cls, width, height): 

  """按照固定尺寸处理图片""" 

  im = Image.open(cls.infile) 

  out = im.resize((width, height),Image.ANTIALIAS) 

  out.save(cls.outfile) 

 

 @classmethod 

 def resize_by_width(cls, w_divide_h): 

  """按照宽度进行所需比例缩放""" 

  im = Image.open(cls.infile) 

  (x, y) = im.size 

  x_s = x 

  y_s = x/w_divide_h 

  out = im.resize((x_s, y_s), Image.ANTIALIAS) 

  out.save(cls.outfile) 

 

 @classmethod 

 def resize_by_height(cls, w_divide_h): 

  """按照高度进行所需比例缩放""" 

  im = Image.open(cls.infile) 

  (x, y) = im.size 

  x_s = y*w_divide_h 

  y_s = y 

  out = im.resize((x_s, y_s), Image.ANTIALIAS) 

  out.save(cls.outfile) 

 

 @classmethod 

 def resize_by_size(cls, size): 

  """按照生成图片文件大小进行处理(单位KB)""" 

  size *= 1024 

  im = Image.open(cls.infile) 

  size_tmp = os.path.getsize(cls.infile) 

  q = 100 

  while size_tmp > size and q > 0: 

   print q 

   out = im.resize(im.size, Image.ANTIALIAS) 

   out.save(cls.outfile, quality=q) 

   size_tmp = os.path.getsize(cls.outfile) 

   q -= 5 

  if q == 100: 

   shutil.copy(cls.infile, cls.outfile) 

 

 @classmethod 

 def cut_by_ratio(cls, width, height): 

  """按照图片长宽比进行分割""" 

  im = Image.open(cls.infile) 

  width = float(width) 

  height = float(height) 

  (x, y) = im.size 

  if width > height: 

   region = (0, int((y-(y * (height / width)))/2), x, int((y+(y * (height / width)))/2)) 

  elif width < height: 

   region = (int((x-(x * (width / height)))/2), 0, int((x+(x * (width / height)))/2), y) 

  else: 

   region = (0, 0, x, y) 

 

  #裁切图片 

  crop_img = im.crop(region) 

  #保存裁切后的图片 

  crop_img.save(cls.outfile) 







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。