----- Foreword-----
I just started to look at Python, and I feel so far from the times.
Now I am reading "Python Computer Vision Programming", welcome to communicate!
----- Subject -----
PIL, Phthon Imaging Library, Python image graph library.
Provides general image processing functions, as well as a large number of useful basic image operations such as image scaling, cropping, rotation, color conversion, and more.
Code example:
from PIL import Image
#read image
im = Image.open("empire.jpeg")
thumbnail_im = Image.open("empire.jpeg")
# Image color conversion
pil_im = Image.open("empire.jpeg").convert('L')
# Thumbnail
thumbnail_im.thumbnail((128, 128))
#copy image area
box =(100, 100, 400, 300)
region = im.crop(box)
#paste image area
region = region.transpose(Image.ROTATE_180)
im.paste(region, box)
#resize
resize_im = im.resize((200, 200))
#rotate: The angle to rotate counterclockwise
rotate_im = im.rotate(45)
# save the image
pil_im.save("empire_L.jpg")
thumbnail_im.save("empire_thumbnail.jpg")
region.save("empire_region.jpg")
im.save("empire_c&p.jpg")
resize_im.save("resize.jpg")
rotate_im.save("rotate.jpg")
#im.show()
#pil_im.show()
#thumbnail_im.show()
#region.show()
#resize_im.show()
#rotate_im.show()
process result:
1. Original image
2. Color conversion (gray)
3. Thumbnails
4. Intercepted part (rotated 180 degrees here)
5. Cut and paste
6. Resize
7. Rotate (45 degrees counterclockwise)
<Reference>
1. PIL installation
http://blog.csdn.net/liuhuaju/article/details/52702918
2.Image module Hankbook
http://effbot.org/imagingbook/image.htm
To be continued--