python使用Image处理图片常用技巧分析

#coding=utf-8import Imageimport urllib2import StringIOimport os#改变图片大小def resize_img(img_path):  try:    img = Image.open(img_path)    (width,height) = img.size    new_width = 200    new_height = height * new_width / width    out = img.resize((new_width,new_height),Image.ANTIALIAS)    ext = os.path.splitext(img_path)[1]    new_file_name = '%s%s' %('small',ext)    out.save(new_file_name,quality=95)  except Exception,e:    print e#改变图片类型def change_img_type(img_path):  try:    img = Image.open(img_path)    img.save('new_type.png')  except Exception,e:    print e#处理远程图片def handle_remote_img(img_url):  try:    request = urllib2.Request(img_url)    img_data = urllib2.urlopen(request).read()    img_buffer = StringIO.StringIO(img_data)    img = Image.open(img_buffer)    img.save('remote.jpg')    (width,height) = img.size    out = img.resize((200,height * 200 / width),Image.ANTIALIAS)    out.save('remote_small.jpg')  except Exception,e:    print eif __name__ == '__main__':  img_path = 'test.jpg'  resize_img(img_path)  change_img_type(img_path)  img_url = 'http://img.hb.aicdn.com/042f8a4a70239f724ff7b9fa0fc8edf18658f41022ada-WcItWE_fw554'  handle_remote_img(img_url)