Image Processing

To install Pillow:

pip3 install pillow

simple_pillow.py

from PIL import Image
import urllib.request

try:
    #get an original image:
    url = "http://www.digisoln.com/teachers/there-is-no-cloud.png"
    g = urllib.request.urlopen(url)
    with open('cloud.png', 'b+w') as f:
        f.write(g.read())

    #load both images into memory for comparison:
    original = Image.open("cloud.png")
    thumb = Image.open("cloud.png")

    #edit thumbnail image data:
    thumb.thumbnail((128, 128))
    
    #^^ 128x128 is max dimensions for thumb, not the scale size!
    #this will keep the thumbs proportionality locked (not skewed).
    #this will also NOT enlarge an image
    
    thumb.save("th_cloud.png")

    #compare both images:
    print("Original: ", original.format, original.size, original.mode)
    print("Thumbnail: ", thumb.format, thumb.size, thumb.mode)
    
except Exception as error:
    print(repr(error))

extended_pillow.py

from PIL import Image, ImageFilter
import urllib.request

try:
    #get an original image:
    url = "http://digisoln.com/teachers/stacked.jpg"
    g = urllib.request.urlopen(url)
    with open('stacked.jpg', 'b+w') as f:
        f.write(g.read())

    #load image into memory:
    imagedata = Image.open("stacked.jpg")

    #Filters available in Pillow:
    #BLUR, CONTOUR, DETAIL, EDGE_ENHANCE, EDGE_ENHANCE_MORE
    #EMBOSS, FIND_EDGES, SMOOTH, SMOOTH_MORE, SHARPEN:
    imagedata = imagedata.filter(ImageFilter.CONTOUR)

    #resize and compress the image:
    width, height = imagedata.size
    newsize = (width, int(round(height / 2)))
    imagedata = imagedata.resize(newsize, Image.ANTIALIAS)
    imagedata.save("stacked_changed.jpg", quality=5)  #5%    
    imagedata.show() #this will show a temporary display
    
except Exception as error:
    print(repr(error))