Walks directory for image files and merges them into a large sheet at a fixed individual size.

ImageTiler.py

#!/usr/bin/env python
# encoding: utf-8
import Image
import sys
import os


def main():
	path = "where-images-may-live"
	
	columns = 10
	column = 0
	row = 0
	width, height = 216, 120
	extensions = ["png"]
	images = getImages(path, extensions)
	mosaic = Image.new( "RGB", ( columns*width, height *int( 1 + len(images)/columns ) ) )
	
	for imgPath in images:
		print "Adding image: " + imgPath
		addImage( imgPath, width*column, row*height, width, height, mosaic )
		column += 1
		if( column == columns ):
			column = 0
			row += 1
	print "Saving mosaic"
	mosaic.save( path + '-mosaic.png' )

def getImages(path, extensions):
	ret = []
	for root, dirs, files in os.walk(path, topdown=False):
		for name in files:
			if( extensions.count( name[-3:] ) != 0 ):
				ret.append( os.path.join( root, name ) )	
	return ret


def addImage(path, x, y, width, height, mosaic):
	img = Image.open(path)
	
	imgOut = img.resize( (width, height), Image.BILINEAR )
	
	cropBox = (0, 0, width, height)
	pasteBox = ( x, y, x + width, y + height )
	
	region = imgOut.crop( cropBox )
	mosaic.paste( region, pasteBox )


if __name__ == '__main__':
	main()