Convert images to ANSI escape sequences

image-to-ansi.py

#! /usr/bin/env python

""" Convert an image (argv[1]) to an ANSI text string (xterm-256color)

Original readme from colortrans.py follows:

Nice long listing of all 256 colors and their codes. Useful for
developing console color themes, or even script output schemes.

Resources:
* http://en.wikipedia.org/wiki/8-bit_color
* http://en.wikipedia.org/wiki/ANSI_escape_code
* /usr/share/X11/rgb.txt

I'm not sure where this script was inspired from. I think I must have
written it from scratch, though it's been several years now.
"""

__author__    = 'Micah Elliott http://MicahElliott.com; Kevin Lange <k@dakko.us>'
__version__   = '0.1'
__copyright__ = 'Copyright (C) 2011 Micah Elliott.  All rights reserved.'
__license__   = 'WTFPL http://sam.zoy.org/wtfpl/'

#---------------------------------------------------------------------

import sys, re

CLUT = [  # color look-up table
#    8-bit, RGB hex

    # Primary 3-bit (8 colors). Unique representation!
    ('00',  '000000'),
    ('01',  '800000'),
    ('02',  '008000'),
    ('03',  '808000'),
    ('04',  '000080'),
    ('05',  '800080'),
    ('06',  '008080'),
    ('07',  'c0c0c0'),

    # Equivalent "bright" versions of original 8 colors.
    ('08',  '808080'),
    ('09',  'ff0000'),
    ('10',  '00ff00'),
    ('11',  'ffff00'),
    ('12',  '0000ff'),
    ('13',  'ff00ff'),
    ('14',  '00ffff'),
    ('15',  'ffffff'),

    # Strictly ascending.
    ('16',  '000000'),
    ('17',  '00005f'),
    ('18',  '000087'),
    ('19',  '0000af'),
    ('20',  '0000d7'),
    ('21',  '0000ff'),
    ('22',  '005f00'),
    ('23',  '005f5f'),
    ('24',  '005f87'),
    ('25',  '005faf'),
    ('26',  '005fd7'),
    ('27',  '005fff'),
    ('28',  '008700'),
    ('29',  '00875f'),
    ('30',  '008787'),
    ('31',  '0087af'),
    ('32',  '0087d7'),
    ('33',  '0087ff'),
    ('34',  '00af00'),
    ('35',  '00af5f'),
    ('36',  '00af87'),
    ('37',  '00afaf'),
    ('38',  '00afd7'),
    ('39',  '00afff'),
    ('40',  '00d700'),
    ('41',  '00d75f'),
    ('42',  '00d787'),
    ('43',  '00d7af'),
    ('44',  '00d7d7'),
    ('45',  '00d7ff'),
    ('46',  '00ff00'),
    ('47',  '00ff5f'),
    ('48',  '00ff87'),
    ('49',  '00ffaf'),
    ('50',  '00ffd7'),
    ('51',  '00ffff'),
    ('52',  '5f0000'),
    ('53',  '5f005f'),
    ('54',  '5f0087'),
    ('55',  '5f00af'),
    ('56',  '5f00d7'),
    ('57',  '5f00ff'),
    ('58',  '5f5f00'),
    ('59',  '5f5f5f'),
    ('60',  '5f5f87'),
    ('61',  '5f5faf'),
    ('62',  '5f5fd7'),
    ('63',  '5f5fff'),
    ('64',  '5f8700'),
    ('65',  '5f875f'),
    ('66',  '5f8787'),
    ('67',  '5f87af'),
    ('68',  '5f87d7'),
    ('69',  '5f87ff'),
    ('70',  '5faf00'),
    ('71',  '5faf5f'),
    ('72',  '5faf87'),
    ('73',  '5fafaf'),
    ('74',  '5fafd7'),
    ('75',  '5fafff'),
    ('76',  '5fd700'),
    ('77',  '5fd75f'),
    ('78',  '5fd787'),
    ('79',  '5fd7af'),
    ('80',  '5fd7d7'),
    ('81',  '5fd7ff'),
    ('82',  '5fff00'),
    ('83',  '5fff5f'),
    ('84',  '5fff87'),
    ('85',  '5fffaf'),
    ('86',  '5fffd7'),
    ('87',  '5fffff'),
    ('88',  '870000'),
    ('89',  '87005f'),
    ('90',  '870087'),
    ('91',  '8700af'),
    ('92',  '8700d7'),
    ('93',  '8700ff'),
    ('94',  '875f00'),
    ('95',  '875f5f'),
    ('96',  '875f87'),
    ('97',  '875faf'),
    ('98',  '875fd7'),
    ('99',  '875fff'),
    ('100', '878700'),
    ('101', '87875f'),
    ('102', '878787'),
    ('103', '8787af'),
    ('104', '8787d7'),
    ('105', '8787ff'),
    ('106', '87af00'),
    ('107', '87af5f'),
    ('108', '87af87'),
    ('109', '87afaf'),
    ('110', '87afd7'),
    ('111', '87afff'),
    ('112', '87d700'),
    ('113', '87d75f'),
    ('114', '87d787'),
    ('115', '87d7af'),
    ('116', '87d7d7'),
    ('117', '87d7ff'),
    ('118', '87ff00'),
    ('119', '87ff5f'),
    ('120', '87ff87'),
    ('121', '87ffaf'),
    ('122', '87ffd7'),
    ('123', '87ffff'),
    ('124', 'af0000'),
    ('125', 'af005f'),
    ('126', 'af0087'),
    ('127', 'af00af'),
    ('128', 'af00d7'),
    ('129', 'af00ff'),
    ('130', 'af5f00'),
    ('131', 'af5f5f'),
    ('132', 'af5f87'),
    ('133', 'af5faf'),
    ('134', 'af5fd7'),
    ('135', 'af5fff'),
    ('136', 'af8700'),
    ('137', 'af875f'),
    ('138', 'af8787'),
    ('139', 'af87af'),
    ('140', 'af87d7'),
    ('141', 'af87ff'),
    ('142', 'afaf00'),
    ('143', 'afaf5f'),
    ('144', 'afaf87'),
    ('145', 'afafaf'),
    ('146', 'afafd7'),
    ('147', 'afafff'),
    ('148', 'afd700'),
    ('149', 'afd75f'),
    ('150', 'afd787'),
    ('151', 'afd7af'),
    ('152', 'afd7d7'),
    ('153', 'afd7ff'),
    ('154', 'afff00'),
    ('155', 'afff5f'),
    ('156', 'afff87'),
    ('157', 'afffaf'),
    ('158', 'afffd7'),
    ('159', 'afffff'),
    ('160', 'd70000'),
    ('161', 'd7005f'),
    ('162', 'd70087'),
    ('163', 'd700af'),
    ('164', 'd700d7'),
    ('165', 'd700ff'),
    ('166', 'd75f00'),
    ('167', 'd75f5f'),
    ('168', 'd75f87'),
    ('169', 'd75faf'),
    ('170', 'd75fd7'),
    ('171', 'd75fff'),
    ('172', 'd78700'),
    ('173', 'd7875f'),
    ('174', 'd78787'),
    ('175', 'd787af'),
    ('176', 'd787d7'),
    ('177', 'd787ff'),
    ('178', 'd7af00'),
    ('179', 'd7af5f'),
    ('180', 'd7af87'),
    ('181', 'd7afaf'),
    ('182', 'd7afd7'),
    ('183', 'd7afff'),
    ('184', 'd7d700'),
    ('185', 'd7d75f'),
    ('186', 'd7d787'),
    ('187', 'd7d7af'),
    ('188', 'd7d7d7'),
    ('189', 'd7d7ff'),
    ('190', 'd7ff00'),
    ('191', 'd7ff5f'),
    ('192', 'd7ff87'),
    ('193', 'd7ffaf'),
    ('194', 'd7ffd7'),
    ('195', 'd7ffff'),
    ('196', 'ff0000'),
    ('197', 'ff005f'),
    ('198', 'ff0087'),
    ('199', 'ff00af'),
    ('200', 'ff00d7'),
    ('201', 'ff00ff'),
    ('202', 'ff5f00'),
    ('203', 'ff5f5f'),
    ('204', 'ff5f87'),
    ('205', 'ff5faf'),
    ('206', 'ff5fd7'),
    ('207', 'ff5fff'),
    ('208', 'ff8700'),
    ('209', 'ff875f'),
    ('210', 'ff8787'),
    ('211', 'ff87af'),
    ('212', 'ff87d7'),
    ('213', 'ff87ff'),
    ('214', 'ffaf00'),
    ('215', 'ffaf5f'),
    ('216', 'ffaf87'),
    ('217', 'ffafaf'),
    ('218', 'ffafd7'),
    ('219', 'ffafff'),
    ('220', 'ffd700'),
    ('221', 'ffd75f'),
    ('222', 'ffd787'),
    ('223', 'ffd7af'),
    ('224', 'ffd7d7'),
    ('225', 'ffd7ff'),
    ('226', 'ffff00'),
    ('227', 'ffff5f'),
    ('228', 'ffff87'),
    ('229', 'ffffaf'),
    ('230', 'ffffd7'),
    ('231', 'ffffff'),

    # Gray-scale range.
    ('232', '080808'),
    ('233', '121212'),
    ('234', '1c1c1c'),
    ('235', '262626'),
    ('236', '303030'),
    ('237', '3a3a3a'),
    ('238', '444444'),
    ('239', '4e4e4e'),
    ('240', '585858'),
    ('241', '626262'),
    ('242', '6c6c6c'),
    ('243', '767676'),
    ('244', '808080'),
    ('245', '8a8a8a'),
    ('246', '949494'),
    ('247', '9e9e9e'),
    ('248', 'a8a8a8'),
    ('249', 'b2b2b2'),
    ('250', 'bcbcbc'),
    ('251', 'c6c6c6'),
    ('252', 'd0d0d0'),
    ('253', 'dadada'),
    ('254', 'e4e4e4'),
    ('255', 'eeeeee'),
]

def _str2hex(hexstr):
    return int(hexstr, 16)

def _strip_hash(rgb):
    # Strip leading `#` if exists.
    if rgb.startswith('#'):
        rgb = rgb.lstrip('#')
    return rgb

def _create_dicts():
    short2rgb_dict = dict(CLUT)
    rgb2short_dict = {}
    for k, v in short2rgb_dict.items():
        rgb2short_dict[v] = k
    return rgb2short_dict, short2rgb_dict

def short2rgb(short):
    return SHORT2RGB_DICT[short]

def print_all():
    """ Print all 256 xterm color codes.
    """
    for short, rgb in CLUT:
        sys.stdout.write('\033[48;5;%sm%s:%s' % (short, short, rgb))
        sys.stdout.write("\033[0m  ")
        sys.stdout.write('\033[38;5;%sm%s:%s' % (short, short, rgb))
        sys.stdout.write("\033[0m\n")
    print "Printed all codes."
    print "You can translate a hex or 0-255 code by providing an argument."

def rgb2short(rgb):
    """ Find the closest xterm-256 approximation to the given RGB value.
    @param rgb: Hex code representing an RGB value, eg, 'abcdef'
    @returns: String between 0 and 255, compatible with xterm.
    >>> rgb2short('123456')
    ('23', '005f5f')
    >>> rgb2short('ffffff')
    ('231', 'ffffff')
    >>> rgb2short('0DADD6') # vimeo logo
    ('38', '00afd7')
    """
    rgb = _strip_hash(rgb)
    incs = (0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff)
    # Break 6-char RGB code into 3 integer vals.
    parts = [ int(h, 16) for h in re.split(r'(..)(..)(..)', rgb)[1:4] ]
    res = []
    for part in parts:
        i = 0
        while i < len(incs)-1:
            s, b = incs[i], incs[i+1]  # smaller, bigger
            if s <= part <= b:
                s1 = abs(s - part)
                b1 = abs(b - part)
                if s1 < b1: closest = s
                else: closest = b
                res.append(closest)
                break
            i += 1
    #print '***', res
    res = ''.join([ ('%02.x' % i) for i in res ])
    equiv = RGB2SHORT_DICT[ res ]
    #print '***', res, equiv
    return equiv, res

RGB2SHORT_DICT, SHORT2RGB_DICT = _create_dicts()

#---------------------------------------------------------------------

if __name__ == '__main__':
    import Image
    im = Image.open(sys.argv[1])
    for y in xrange(im.size[1]):
        for x in xrange(im.size[0]):
            p = im.getpixel((x,y))
            h = "%2x%2x%2x" % (p[0],p[1],p[2])
            short, rgb = rgb2short(h)
            sys.stdout.write("\033[48;5;%sm  " % short)
        sys.stdout.write("\033[0m\n")
    sys.stdout.write("\n")

Could you please give me some help on below question? Thanks
I use the 48x48 PNG picture, run this script, but the result looks not quite right(display an entire screen, and not very clear).
system: ubuntu12.04 32bit
python version: python2.7
picture url: http://png-5.findicons.com/files/icons/1790/large_android/48/android_sh.png

I get this error message:

    Traceback (most recent call last):
  File "C:/Users/Home/Desktop/k----n/Projects/Random Coding/Python/image test 2.py", line 361, in <module>
    import Image
ModuleNotFoundError: No module named 'Image'

I did, however, go to windows powershell and type 'pip install Image', which installed successfully, but that didn't help.

Image class belongs to the PIL module.
So, type "pip install pillow"
And this dependence will be solved.

I changed import Image to from PIL import Image to get it working after running pip install pillow

I changed import Image to from PIL import Image to get it working after running pip install pillow

Thank you