python处理图片之PIL模块简单使用方法

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本文实例讲述了python处理图片之PIL模块简单使用方法。分享给大家供大家参考。具体实现方法如下:


    #!/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()

原图:

处理过的画图:(锐化过的)

PS:此外还有另一个比较常用的模块,image模块。

希望本文所述对大家的Python程序设计有所帮助。

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