python处理图片之PIL模块简单使用方法

#!/usr/bin/env python
#encoding: utf-8
import Image
class myimg:
def __init__(self, open_file, save_file):
self.img = Image.open(open_file)
self.save_file = save_file
def Change_Size(self, percent=100, height=None, width=None):
'''''
percent：以百分比来决定大小
height， width:以指定的高、宽来决定大小
'''
if not (height and width):
width,height = self.img.size
new_img = self.img.resize((width*percent/100,height*percent/100),Image.BILINEAR)
new_img.save(self.save_file)
def Rotation(self, angle):
'''''
angle： 旋转的度数
'''
rot_img = self.img.rotate(angle) #旋转
rot_img.save(self.save_file)
def Save_as(self, filename):
'''''
filename: 另存为图片格式，直接根据后缀名来
'''
self.img.save(filename)
def Draw_Something(self):
'''''
利用ImageDraw来画图形
'''
import ImageDraw
draw = ImageDraw.Draw(self.img)
width,height = self.img.size
draw.line(((0,0),(width-1,height-1)),fill=255) #画直线
draw.line(((0,height-1),(width-1,0)),fill=255)
draw.arc((0,0,width-1,height-1),0,360,fill=255) #画椭圆
self.img.save(self.save_file)
def Enhance_Something(self):
'''''
利用 ImageEnhance来增强图片效果
'''
import ImageEnhance
brightness = ImageEnhance.Brightness(self.img)
bright_img = brightness.enhance(2.0) ##亮度增强
bright_img.save(self.save_file)
sharpness = ImageEnhance.Sharpness(self.img)
sharp_img = sharpness.enhance(7.0) #锐度增强
sharp_img.save(self.save_file)
contrast = ImageEnhance.Contrast(self.img) #对比度增强
contrast_img = contrast.enhance(2.0)
contrast_img.save(self.save_file)
if __name__ == "__main__":
file_name = r"D:test.png"
save_file = r"D:save.png"
saveas_file = r"D:save_as.bmp"
oimg = myimg(file_name, save_file)
oimg.Change_Size(30)
oimg.Rotation(45)
oimg.Save_as(saveas_file)
oimg.Draw_Something()
oimg.Enhance_Something()