Python Image Library - Examples

import Image

global ext
ext = ".jpg"

imageFile = "test.jpg"
im1 = Image.open(imageFile)

Original image

Resize

def imgResize(im):

    div = 2
    width = im.size[0] / div
    height = im.size[1] / div

    im2 = im.resize((width, height), Image.NEAREST) # use nearest neighbour
    im3 = im.resize((width, height), Image.BILINEAR) # linear interpolation in a 2x2 environment
    im4 = im.resize((width, height), Image.BICUBIC) # cubic spline interpolation in a 4x4 environment
    im5 = im.resize((width, height), Image.ANTIALIAS) # best down-sizing filter
    
    im2.save("NEAREST" + ext)
    im3.save("BILINEAR" + ext)
    im4.save("BICUBIC" + ext)
    im5.save("ANTIALIAS" + ext)

imgResize(im1)

Crop

def imgCrop(im):
    
    box = (50, 50, 200, 300)
    region = im.crop(box)
    region.save("CROPPED" + ext)

imgCrop(im1)

Transpose

def imgTranspose(im):
    
    box = (50, 50, 200, 300)
    region = im.crop(box)
    
    region = region.transpose(Image.ROTATE_180)
    im.paste(region, box)
    
    im.save("TRANSPOSE" + ext)

imgTranspose(im1)

Band merge

    
def bandMerge(im):
    
    r, g, b = im.split()
    im = Image.merge("RGB", (g,g,g))
    
    im.save("MERGE" + ext)

bandMerge(im1)

Blur

import ImageFilter

def filterBlur(im):
    
    im1 = im.filter(ImageFilter.BLUR)
    
    im1.save("BLUR" + ext)

filterBlur(im1)

Find contours

    
def filterContour(im):
    
    im1 = im.filter(ImageFilter.CONTOUR)
    
    im1.save("CONTOUR" + ext)

filterContour(im1)

Find edges

def filterFindEdges(im):
    
    im1 = im.filter(ImageFilter.FIND_EDGES)
    
    im1.save("EDGES" + ext)

filterFindEdges(im1)