Python Learning note __13.1 Three-party module Pillow

# This is a learning note for the Liaoche teacher Python tutorial

The Python platform de facto image Processing Standard library is PIL: Python Imaging library. A group of volunteers created a compatible version based on PiL, named Pillow

1 , manipulating images

From PIL import Image

# Open a JPG image file, note the current path:

im = image.open(' test.jpg ')

# Get Image size:

W, h = im.size

Print (' Original image size:%sx%s '% (w, h))

# Zoom to 50%:

Im. thumbnail ((W//2, H//2))

Print (' Resize image to:%sx%s '% (W//2, H//2))

# Save the scaled image as thumbnail.jpg in JPEG format:

Im. Save (' thumbnail.jpg ', ' jpeg ')

2 , Blur effect

From PIL import Image, ImageFilter

# Open a JPG image file, note the current path:

im = image.open(' test.jpg ')

# Apply Blur filter:

Im2 = im. filter (Imagefilter.blur)

Im2.save (' blur.jpg ', ' jpeg ')

3 , generate the letter Captcha picture

From PIL import Image, Imagedraw, Imagefont, ImageFilter

Import Random

# Random Letters:

Def Rndchar ():

Return Chr (Random.randint (65, 90))

# Random Color 1:

Def rndcolor ():

Return (Random.randint, 255), Random.randint (255), Random.randint (64, 255))

# Random Color 2:

Def rndColor2 ():

Return (Random.randint (127), Random.randint (127), Random.randint (32, 127))

# Size: 60 x:

width = 60 * 4

Height = 60

# Create Image object, RGB: Color mode, (width, height): Picture size. (255, 255, 255): 16 binary color code, this is white

Image = image.new(' RGB ', (width, height), (255, 255, 255))

# Create a Font object that defines the fonts and font size of the image. Use absolute path to avoid error

Font = Imagefont.truetype("c/windows/fonts/ahronbd.ttf", 36)

# Create a Draw object that will initially create an image object as a parameter

Draw = Imagedraw.draw(image)

# Populate each pixel:

For x in range (width):

For y in range (height):

Draw.point ((x, y), fill=rndcolor ())

# Output Text:

For T in range (4):

Draw.text ((* t + ten), Rndchar (), Font=font, Fill=rndcolor2 ()) # set character position, character, character's font, character color

Fuzzy

Image = Image.filter (Imagefilter.blur)

Image.Save (' code.jpg ', ' jpeg ')

4 , expand Documents

Pillow Official document (https://pillow.readthedocs.io/en/5.1.x/)

python-image basic image processing Operations (https://www.cnblogs.com/kongzhagen/p/6295925.html)

Python Learning note __13.1 Three-party module Pillow