pil

 1 import Image
 2 img=Image.open(‘o.jpg‘)
 3 w,h=img.size
 4 img1=Image.new(‘RGB‘,(w,h))
 5 for x in range(w):
 6     for y in range(h):
 7         (r,g,b)=img.getpixel((x,y))
 8         if r+g+b>255:
 9             nc=(255,255,255)
10         else:
11             nc=(0,0,0)
12         img1.putpixel((x,y),nc)
13 img1.save(‘n.jpg‘)

1 import ImageDraw 
2 draw = ImageDraw.Draw(img) 
3 width,height = img.size 
4 draw.line(((0,0),(width-1,height-1)),fill=255) #画直线 
5 draw.line(((0,height-1),(width-1,0)),fill=255) 
6 draw.arc((0,0,width-1,height-1),0,360,fill=255) #画椭圆 
7 img.save(self.save_file) 

 1 import ImageEnhance 
 2 brightness = ImageEnhance.Brightness(img) 
 3 bright_img = brightness.enhance(2.0) ##亮度增强 
 4 bright_img.save(img1) 
 5 sharpness = ImageEnhance.Sharpness(img) 
 6 sharp_img = sharpness.enhance(7.0) #锐度增强 
 7 sharp_img.save(img1) 
 8 contrast = ImageEnhance.Contrast(img) #对比度增强 
 9 contrast_img = contrast.enhance(2.0)  
10 contrast_img.save(img1)