#!/usr/bin/env python3 # -*- coding: utf-8 -*- """ Example to show how to make an ascii image from a jpg-image using Pillow (PIL). http://pillow.readthedocs.io/ Algorithm from: http://a-eter.blogspot.se/2010/04/image-to-ascii-art-in-python.html Rewritten to functions and Python3. """ import sys import os import getopt from PIL import Image # # Add some stuff about this script # PROGRAM = os.path.basename(sys.argv[0]) AUTHOR = "Mikael Roos" EMAIL = "[email protected]" VERSION = "1.0.0" USAGE = """{program} - Create ASCII art from image. By {author} ({email}), version {version}. Usage: {program} [options] name Options: -h, --help Display this help message. -v, --version Print version and exit. """.format(program=PROGRAM, author=AUTHOR, email=EMAIL, version=VERSION) MSG_VERSION = "{program} version {version}.".format(program=PROGRAM, version=VERSION) MSG_USAGE = "Use {program} --help to get usage.\n".format(program=PROGRAM) # # Global default settings affecting behaviour of script in several places # EXIT_SUCCESS = 0 EXIT_USAGE = 1 EXIT_FAILED = 2 def printUsage(exitStatus): """ Print usage information about the script and exit. """ print(USAGE) sys.exit(exitStatus) def printVersion(): """ Print version information and exit. """ print(MSG_VERSION) sys.exit(EXIT_SUCCESS) def parseOptions(): """ Merge default options with incoming options and arguments and return them as a dictionary. """ # Switch through all options try: opts, _ = getopt.getopt(sys.argv[1:], "hv", [ "help", "version", ]) for opt, _ in opts: if opt in ("-h", "--help"): printUsage(EXIT_SUCCESS) elif opt in ("-v", "--version"): printVersion() else: assert False, "Unhandled option" #if len(args) != 1: # assert False, "Missing argument" except Exception as err: print(err) print(MSG_USAGE) # Prints the callstack, good for debugging, comment out for production # traceback.print_exception(Exception, err, None) sys.exit(EXIT_USAGE) def loadImageFromFile(imageFile, newWidth): """ Load image from file and use it to create a new fixed size and grayscale image from it. """ img = Image.open(imageFile) width, height = img.size newHeight = int((height * newWidth) / width) newImage = img.resize((newWidth, newHeight)) newImage = newImage.convert("L") # convert to grayscale return newImage def imageToAscii(image): """ Convert image to ASCII image and return as list. """ asciiChars = ['#', 'A', '@', '%', 'S', '+', '<', '*', ':', ',', '.'] imageAsAscii = [] allPixels = list(image.getdata()) for pixelValue in allPixels: index = int(pixelValue / 25) # 0 - 10 imageAsAscii.append(asciiChars[index]) return imageAsAscii def printAsciiImage(image, width): """ Print an ASCII image. """ image = ''.join(ch for ch in image) for c in range(0, len(image), width): print(image[c:c + width]) def main(): """ Main function to carry out the work. """ parseOptions() width = 80 image = loadImageFromFile("mos.jpg", width) imgAsAscii = imageToAscii(image) printAsciiImage(imgAsAscii, width) sys.exit(EXIT_SUCCESS) if __name__ == "__main__": main()