Convert images to ANSI escape sequences

fbcon-Debian-9.pal

# Palette
# Mode: RGB
0 0 0 0
1 170 0 0
2 0 170 0
3 170 85 0
4 0 0 170
5 170 0 170
6 0 170 170
7 170 170 170
8 85 85 85
9 255 85 85
10 85 255 85
11 255 255 85
12 85 85 255
13 255 85 255
14 85 255 255
15 255 255 255
16 0 0 0
17 0 0 0
18 0 0 0
19 0 0 0
20 0 0 0
21 0 0 0
22 0 0 0
23 0 0 0
24 0 0 0
25 0 0 0
26 0 0 0
27 0 0 0
28 0 0 0
29 0 0 0
30 0 0 0
31 0 0 0
32 0 0 0
33 0 0 0
34 0 0 0
35 0 0 0
36 0 0 0
37 0 0 0
38 0 0 0
39 0 0 0
40 0 0 0
41 0 0 0
42 0 0 0
43 0 0 0
44 0 0 0
45 0 0 0
46 0 0 0
47 0 0 0
48 0 0 0
49 0 0 0
50 0 0 0
51 0 0 0
52 0 0 0
53 0 0 0
54 0 0 0
55 0 0 0
56 0 0 0
57 0 0 0
58 0 0 0
59 0 0 0
60 0 0 0
61 0 0 0
62 0 0 0
63 0 0 0
64 0 0 0
65 0 0 0
66 0 0 0
67 0 0 0
68 0 0 0
69 0 0 0
70 0 0 0
71 0 0 0
72 0 0 0
73 0 0 0
74 0 0 0
75 0 0 0
76 0 0 0
77 0 0 0
78 0 0 0
79 0 0 0
80 0 0 0
81 0 0 0
82 0 0 0
83 0 0 0
84 0 0 0
85 0 0 0
86 0 0 0
87 0 0 0
88 0 0 0
89 0 0 0
90 0 0 0
91 0 0 0
92 0 0 0
93 0 0 0
94 0 0 0
95 0 0 0
96 0 0 0
97 0 0 0
98 0 0 0
99 0 0 0
100 0 0 0
101 0 0 0
102 0 0 0
103 0 0 0
104 0 0 0
105 0 0 0
106 0 0 0
107 0 0 0
108 0 0 0
109 0 0 0
110 0 0 0
111 0 0 0
112 0 0 0
113 0 0 0
114 0 0 0
115 0 0 0
116 0 0 0
117 0 0 0
118 0 0 0
119 0 0 0
120 0 0 0
121 0 0 0
122 0 0 0
123 0 0 0
124 0 0 0
125 0 0 0
126 0 0 0
127 0 0 0
128 0 0 0
129 0 0 0
130 0 0 0
131 0 0 0
132 0 0 0
133 0 0 0
134 0 0 0
135 0 0 0
136 0 0 0
137 0 0 0
138 0 0 0
139 0 0 0
140 0 0 0
141 0 0 0
142 0 0 0
143 0 0 0
144 0 0 0
145 0 0 0
146 0 0 0
147 0 0 0
148 0 0 0
149 0 0 0
150 0 0 0
151 0 0 0
152 0 0 0
153 0 0 0
154 0 0 0
155 0 0 0
156 0 0 0
157 0 0 0
158 0 0 0
159 0 0 0
160 0 0 0
161 0 0 0
162 0 0 0
163 0 0 0
164 0 0 0
165 0 0 0
166 0 0 0
167 0 0 0
168 0 0 0
169 0 0 0
170 0 0 0
171 0 0 0
172 0 0 0
173 0 0 0
174 0 0 0
175 0 0 0
176 0 0 0
177 0 0 0
178 0 0 0
179 0 0 0
180 0 0 0
181 0 0 0
182 0 0 0
183 0 0 0
184 0 0 0
185 0 0 0
186 0 0 0
187 0 0 0
188 0 0 0
189 0 0 0
190 0 0 0
191 0 0 0
192 0 0 0
193 0 0 0
194 0 0 0
195 0 0 0
196 0 0 0
197 0 0 0
198 0 0 0
199 0 0 0
200 0 0 0
201 0 0 0
202 0 0 0
203 0 0 0
204 0 0 0
205 0 0 0
206 0 0 0
207 0 0 0
208 0 0 0
209 0 0 0
210 0 0 0
211 0 0 0
212 0 0 0
213 0 0 0
214 0 0 0
215 0 0 0
216 0 0 0
217 0 0 0
218 0 0 0
219 0 0 0
220 0 0 0
221 0 0 0
222 0 0 0
223 0 0 0
224 0 0 0
225 0 0 0
226 0 0 0
227 0 0 0
228 0 0 0
229 0 0 0
230 0 0 0
231 0 0 0
232 0 0 0
233 0 0 0
234 0 0 0
235 0 0 0
236 0 0 0
237 0 0 0
238 0 0 0
239 0 0 0
240 0 0 0
241 0 0 0
242 0 0 0
243 0 0 0
244 0 0 0
245 0 0 0
246 0 0 0
247 0 0 0
248 0 0 0
249 0 0 0
250 0 0 0
251 0 0 0
252 0 0 0
253 0 0 0
254 0 0 0
255 0 0 0

fbcon-Debian-9.png

fbcon-Ubuntu-16_04.pal

# Palette
# Mode: RGB
0 1 1 1
1 222 56 43
2 57 181 74
3 255 199 6
4 0 111 184
5 118 38 113
6 44 181 233
7 204 204 204
8 128 128 128
9 255 0 0
10 0 255 0
11 255 255 0
12 0 0 255
13 255 0 255
14 0 255 255
15 255 255 255
16 0 0 0
17 0 0 0
18 0 0 0
19 0 0 0
20 0 0 0
21 0 0 0
22 0 0 0
23 0 0 0
24 0 0 0
25 0 0 0
26 0 0 0
27 0 0 0
28 0 0 0
29 0 0 0
30 0 0 0
31 0 0 0
32 0 0 0
33 0 0 0
34 0 0 0
35 0 0 0
36 0 0 0
37 0 0 0
38 0 0 0
39 0 0 0
40 0 0 0
41 0 0 0
42 0 0 0
43 0 0 0
44 0 0 0
45 0 0 0
46 0 0 0
47 0 0 0
48 0 0 0
49 0 0 0
50 0 0 0
51 0 0 0
52 0 0 0
53 0 0 0
54 0 0 0
55 0 0 0
56 0 0 0
57 0 0 0
58 0 0 0
59 0 0 0
60 0 0 0
61 0 0 0
62 0 0 0
63 0 0 0
64 0 0 0
65 0 0 0
66 0 0 0
67 0 0 0
68 0 0 0
69 0 0 0
70 0 0 0
71 0 0 0
72 0 0 0
73 0 0 0
74 0 0 0
75 0 0 0
76 0 0 0
77 0 0 0
78 0 0 0
79 0 0 0
80 0 0 0
81 0 0 0
82 0 0 0
83 0 0 0
84 0 0 0
85 0 0 0
86 0 0 0
87 0 0 0
88 0 0 0
89 0 0 0
90 0 0 0
91 0 0 0
92 0 0 0
93 0 0 0
94 0 0 0
95 0 0 0
96 0 0 0
97 0 0 0
98 0 0 0
99 0 0 0
100 0 0 0
101 0 0 0
102 0 0 0
103 0 0 0
104 0 0 0
105 0 0 0
106 0 0 0
107 0 0 0
108 0 0 0
109 0 0 0
110 0 0 0
111 0 0 0
112 0 0 0
113 0 0 0
114 0 0 0
115 0 0 0
116 0 0 0
117 0 0 0
118 0 0 0
119 0 0 0
120 0 0 0
121 0 0 0
122 0 0 0
123 0 0 0
124 0 0 0
125 0 0 0
126 0 0 0
127 0 0 0
128 0 0 0
129 0 0 0
130 0 0 0
131 0 0 0
132 0 0 0
133 0 0 0
134 0 0 0
135 0 0 0
136 0 0 0
137 0 0 0
138 0 0 0
139 0 0 0
140 0 0 0
141 0 0 0
142 0 0 0
143 0 0 0
144 0 0 0
145 0 0 0
146 0 0 0
147 0 0 0
148 0 0 0
149 0 0 0
150 0 0 0
151 0 0 0
152 0 0 0
153 0 0 0
154 0 0 0
155 0 0 0
156 0 0 0
157 0 0 0
158 0 0 0
159 0 0 0
160 0 0 0
161 0 0 0
162 0 0 0
163 0 0 0
164 0 0 0
165 0 0 0
166 0 0 0
167 0 0 0
168 0 0 0
169 0 0 0
170 0 0 0
171 0 0 0
172 0 0 0
173 0 0 0
174 0 0 0
175 0 0 0
176 0 0 0
177 0 0 0
178 0 0 0
179 0 0 0
180 0 0 0
181 0 0 0
182 0 0 0
183 0 0 0
184 0 0 0
185 0 0 0
186 0 0 0
187 0 0 0
188 0 0 0
189 0 0 0
190 0 0 0
191 0 0 0
192 0 0 0
193 0 0 0
194 0 0 0
195 0 0 0
196 0 0 0
197 0 0 0
198 0 0 0
199 0 0 0
200 0 0 0
201 0 0 0
202 0 0 0
203 0 0 0
204 0 0 0
205 0 0 0
206 0 0 0
207 0 0 0
208 0 0 0
209 0 0 0
210 0 0 0
211 0 0 0
212 0 0 0
213 0 0 0
214 0 0 0
215 0 0 0
216 0 0 0
217 0 0 0
218 0 0 0
219 0 0 0
220 0 0 0
221 0 0 0
222 0 0 0
223 0 0 0
224 0 0 0
225 0 0 0
226 0 0 0
227 0 0 0
228 0 0 0
229 0 0 0
230 0 0 0
231 0 0 0
232 0 0 0
233 0 0 0
234 0 0 0
235 0 0 0
236 0 0 0
237 0 0 0
238 0 0 0
239 0 0 0
240 0 0 0
241 0 0 0
242 0 0 0
243 0 0 0
244 0 0 0
245 0 0 0
246 0 0 0
247 0 0 0
248 0 0 0
249 0 0 0
250 0 0 0
251 0 0 0
252 0 0 0
253 0 0 0
254 0 0 0
255 0 0 0

fbcon-Ubuntu-16_04.png

image-to-ansi.py

#! /usr/bin/env python3

""" Convert an image to an (ANSI) text string

Modification by sven@killig.de:
* use DOS block character for double resolution
* size
* 1-4/8/24 bitdepth option
* let Image.convert() do the palette matching
* shades

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>; Sven Killig <sven@killig.de>'
__version__   = '0.3'
__copyright__ = 'Copyright (C) 2011 Micah Elliott.  All rights reserved.'
__license__   = 'WTFPL http://sam.zoy.org/wtfpl/'

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

import sys, re
# [python -m] pip install Image
from PIL import Image, ImagePalette
import shutil
import os
import argparse
from datetime import datetime

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 _create_pal(bitdepth):
    pal = []
    for short, rgb in CLUT:
        pal += [ int(h, 16) for h in re.split(r'(..)(..)(..)', rgb)[1:4] ]
    pal_image = Image.new("P", (1,1))
    pal_image.putpalette(pal[:(2**bitdepth)*3] + [0,0,0]*(256-2**bitdepth))
    return pal_image

def _create_pal_sh(fillfactor):
    """
    bg:
    0, 1/2

    fg:
    0, 1/2, 1

    shades:
    bg          fg          sum
    ░
    3/4*  0=  0 1/4*  0=  0   0 -
    3/4*  0=  0 1/4*1/2=1/8 1/8
    3/4*  0=  0 1/4*  1=1/4 1/4 *
    3/4*1/2=3/8 1/4*  0=  0 3/8 *
    3/4*1/2=3/8 1/4*1/2=1/8 1/2 -
    3/4*1/2=3/8 1/4*  1=1/4 5/8 *
    ▒
    1/2*  0=  0 1/2*  0=  0   0 -
    1/2*  0=  0 1/2*1/2=1/4 1/4 -
    1/2*  0=  0 1/2*  1=1/2 1/2 -
    1/2*1/2=1/4 1/2*  0=  0 1/4 -
    1/2*1/2=1/4 1/2*1/2=1/4 1/2 -
    1/2*1/2=1/4 1/2*  1=1/2 3/4 *
    █
              0   1*  0=  0   0 *
              0   1*1/2=1/2 1/2 *
              0   1*  1=  1   1 *
    
    0, 1/8, 2/8, 3/8, 4/8, 5/8, 6/8, 1
    """
    pal = []
    for i in range(2):
        for j in range(8):
            shortj, rgbj = CLUT[j]
            bg = [ int(h, 16) for h in re.split(r'(..)(..)(..)', rgbj)[1:4] ]
            for k in range(8 if i==1 else 0, 16):
                shortk, rgbk = CLUT[k]
                fg = [ int(h, 16) for h in re.split(r'(..)(..)(..)', rgbk)[1:4] ]
                pal += [ int(bg[h]*(1-fillfactor[i])+fg[h]*(fillfactor[i])) for h in range(3) ]
    for j in range(16):
        shortj, rgbj = CLUT[j]
        pal += [ int(h, 16) for h in re.split(r'(..)(..)(..)', rgbj)[1:4] ]
    pal_image = Image.new("P", (1,1))
    pal_image.putpalette(pal + [0,0,0]*(256-(8*8+8*16+16)))
    return pal_image

def quantizetopalette(silf, palette, dither=False):
    """Convert an RGB or L mode image to use a given P image's palette."""
    # https://stackoverflow.com/a/29438149/9717882

    silf.load()

    # use palette from reference image
    palette.load()
    if palette.mode != "P":
        raise ValueError("bad mode for palette image")
    if silf.mode != "RGB" and silf.mode != "L":
        raise ValueError(
            "only RGB or L mode images can be quantized to a palette"
            )
    im = silf.im.convert("P", 1 if dither else 0, palette.im)
    # the 0 above means turn OFF dithering

    # Later versions of Pillow (4.x) rename _makeself to _new
    try:
        return silf._new(im)
    except AttributeError:
        return silf._makeself(im)

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

if __name__ == '__main__':
    #print (os.environ)
    if os.name=='nt':
        # https://bugs.python.org/msg291732
        # does seem to disable VT mode after exit
        os.system('')
    terminal_size = shutil.get_terminal_size((80, 24))
    columns = terminal_size.columns
    lines = terminal_size.lines
    if os.getenv('COLORTERM')=='truecolor' or os.name=='nt':
        bitdepth = 24
    elif 'xterm-256color' in os.getenv('TERM',''):
        bitdepth = 8
    elif os.getenv('TERM')=='linux':
        bitdepth = 3
    elif os.getenv('TERM')=='dumb':
        bitdepth = 1
    else:
        bitdepth = 4
    threshold = int(256/2)
    if os.getenv('TERM') in {'pc3', 'ansi-bbs'}:
        # Synchronet BBS
        encoding='cp437'
    else:
        encoding=sys.stdout.encoding
    #fillfactor = [.125, .25]
    fillfactor = [.25, .5]

    thisyear = datetime.today().year
    parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter, description="small history lesson: MDA (-b 1 [-s -i]) and CGA (-b 3/-b 4 -s) were introduced by IBM %i years ago." % ((thisyear-1981)))
    parser.add_argument("image")
    parser.add_argument("-c", "--columns", type=int, default=columns, help=" ")
    parser.add_argument("-l", "--lines", type=int, default=lines, help=" ")
    parser.add_argument("-b", "--bitdepth", type=int, choices=[1,2,3,4,8,24], default=bitdepth, help=" ")
    parser.add_argument("-t", "--threshold", type=int, default=threshold, help="for bitdepth 1")
    parser.add_argument("-e", "--encoding", default=encoding, help=" ")
    parser.add_argument("-s", "--shades", action="store_true", help="for bitdepths 1,4")
    parser.add_argument("-i", "--intensity", action="store_true", help="for bitdepth 1 and shades")
    parser.add_argument("-f", "--fillfactor", type=float, nargs=2, default=fillfactor, help="for bitdepth 4 and shades")
    parser.add_argument("-p", "--palette", help="GIMP or teragon-style palette/gradient")
    parser.add_argument("-cb", "--colourbar", action="store_true", help="for creation of screenshot for palette")
    args = parser.parse_args()
    if args.colourbar:
        for i in range(16):
            sys.stdout.buffer.write(bytes("\033[38;5;%im█" % i, args.encoding))
        print("")
        sys.exit()

    shades = [" ","░","▒","█"]
    shades_intensity = [" ","\033[0m░\033[1m","░","▒","█"]
    size = args.columns, args.lines*2
    im = Image.open(args.image)
    im.thumbnail(size, resample=Image.LANCZOS)
    if args.shades:
        im=im.resize(size=(im.size[0], int(im.size[1]/2)), resample=Image.LANCZOS)
    if args.bitdepth==1:
        im=im.convert("L")
        sys.stdout.buffer.write(b"\033[1m")
        if args.intensity:
            sh=shades_intensity
        else:
            sh=shades
    elif args.bitdepth<24:
        if args.palette:
            pal, rawmode = ImagePalette.load(args.palette)
            #print(CLUT)
            for i in range(16):
                CLUT[i]=("%02i" % i, "%02.x%02.x%02.x" % (pal[i*3], pal[i*3+1], pal[i*3+2]))
            #print(CLUT)

        if args.shades:
            pal = _create_pal_sh(args.fillfactor)
        else:
            pal = _create_pal(args.bitdepth)
        im=quantizetopalette(im, pal)
        #im.save("/test.png", "PNG")
        #print(im.getpalette())
    for y in range(0, im.size[1], 1 if args.shades else 2):
        for x in range(im.size[0]):
            pu = im.getpixel((x,y))
            if y+1<im.size[1]:
                pd = im.getpixel((x,y+1))
            if args.bitdepth==1:
                if args.shades:
                    sys.stdout.buffer.write(bytes(sh[int(pu/256*len(sh))], args.encoding))
                else:
                    if y+1<im.size[1]:
                        if pd>args.threshold:
                            if pu>args.threshold:
                                sys.stdout.buffer.write(bytes("█", args.encoding))
                            else:
                                sys.stdout.buffer.write(bytes("▄", args.encoding))
                        else:
                            sys.stdout.buffer.write(bytes(" ", args.encoding))
                    else:
                        if pu>args.threshold:
                            sys.stdout.buffer.write(bytes("▀", args.encoding))
                        else:
                            sys.stdout.buffer.write(bytes(" ", args.encoding))
            elif args.bitdepth<24:
                if args.bitdepth==4 and args.shades:
                    if pu>=8*8+8*16:
                        shade="█"
                        fg=pu-(8*8+8*16)
                        bg=0
                    else:
                        shade=shades[((pu & 0b10000000)>>7)+1]
                        if shade=="░":
                            fg=((pu & 0b00001111)>>0)
                            bg=((pu & 0b01110000)>>4)
                        elif shade=="▒":
                            fg=((pu & 0b00000111)>>0)+8
                            bg=((pu & 0b00111000)>>3)
                    sys.stdout.buffer.write(b"\033[48;5;%im" % bg)
                    sys.stdout.buffer.write(b"\033[38;5;%im" % fg)
                    sys.stdout.buffer.write(bytes(shade, args.encoding))
                else:
                    if y+1<im.size[1]:
                        sys.stdout.buffer.write(b"\033[48;5;%im" % pd)
                    sys.stdout.buffer.write(b"\033[38;5;%im" % pu)
                    sys.stdout.buffer.write(bytes("▀", args.encoding))
            else:
                if y+1<im.size[1]:
                    sys.stdout.buffer.write(b"\033[48;2;%i;%i;%im" % (pd[0],pd[1],pd[2]))
                sys.stdout.buffer.write(b"\033[38;2;%i;%i;%im" % (pu[0],pu[1],pu[2]))
                sys.stdout.buffer.write(bytes("▀", args.encoding))
        sys.stdout.buffer.write(b"\033[0m")
        sys.stdout.buffer.write(b"\n")

macOS-10_14-ColorSync.png

macOS-10_14.pal

# Palette
# Mode: RGB
0 0 0 0
1 153 0 0
2 0 166 0
3 153 153 0
4 0 0 178
5 178 0 178
6 0 166 178
7 191 191 191
8 102 102 102
9 230 0 0
10 0 217 0
11 230 230 0
12 0 0 255
13 230 0 230
14 0 230 230
15 230 230 230
16 0 0 0
17 0 0 0
18 0 0 0
19 0 0 0
20 0 0 0
21 0 0 0
22 0 0 0
23 0 0 0
24 0 0 0
25 0 0 0
26 0 0 0
27 0 0 0
28 0 0 0
29 0 0 0
30 0 0 0
31 0 0 0
32 0 0 0
33 0 0 0
34 0 0 0
35 0 0 0
36 0 0 0
37 0 0 0
38 0 0 0
39 0 0 0
40 0 0 0
41 0 0 0
42 0 0 0
43 0 0 0
44 0 0 0
45 0 0 0
46 0 0 0
47 0 0 0
48 0 0 0
49 0 0 0
50 0 0 0
51 0 0 0
52 0 0 0
53 0 0 0
54 0 0 0
55 0 0 0
56 0 0 0
57 0 0 0
58 0 0 0
59 0 0 0
60 0 0 0
61 0 0 0
62 0 0 0
63 0 0 0
64 0 0 0
65 0 0 0
66 0 0 0
67 0 0 0
68 0 0 0
69 0 0 0
70 0 0 0
71 0 0 0
72 0 0 0
73 0 0 0
74 0 0 0
75 0 0 0
76 0 0 0
77 0 0 0
78 0 0 0
79 0 0 0
80 0 0 0
81 0 0 0
82 0 0 0
83 0 0 0
84 0 0 0
85 0 0 0
86 0 0 0
87 0 0 0
88 0 0 0
89 0 0 0
90 0 0 0
91 0 0 0
92 0 0 0
93 0 0 0
94 0 0 0
95 0 0 0
96 0 0 0
97 0 0 0
98 0 0 0
99 0 0 0
100 0 0 0
101 0 0 0
102 0 0 0
103 0 0 0
104 0 0 0
105 0 0 0
106 0 0 0
107 0 0 0
108 0 0 0
109 0 0 0
110 0 0 0
111 0 0 0
112 0 0 0
113 0 0 0
114 0 0 0
115 0 0 0
116 0 0 0
117 0 0 0
118 0 0 0
119 0 0 0
120 0 0 0
121 0 0 0
122 0 0 0
123 0 0 0
124 0 0 0
125 0 0 0
126 0 0 0
127 0 0 0
128 0 0 0
129 0 0 0
130 0 0 0
131 0 0 0
132 0 0 0
133 0 0 0
134 0 0 0
135 0 0 0
136 0 0 0
137 0 0 0
138 0 0 0
139 0 0 0
140 0 0 0
141 0 0 0
142 0 0 0
143 0 0 0
144 0 0 0
145 0 0 0
146 0 0 0
147 0 0 0
148 0 0 0
149 0 0 0
150 0 0 0
151 0 0 0
152 0 0 0
153 0 0 0
154 0 0 0
155 0 0 0
156 0 0 0
157 0 0 0
158 0 0 0
159 0 0 0
160 0 0 0
161 0 0 0
162 0 0 0
163 0 0 0
164 0 0 0
165 0 0 0
166 0 0 0
167 0 0 0
168 0 0 0
169 0 0 0
170 0 0 0
171 0 0 0
172 0 0 0
173 0 0 0
174 0 0 0
175 0 0 0
176 0 0 0
177 0 0 0
178 0 0 0
179 0 0 0
180 0 0 0
181 0 0 0
182 0 0 0
183 0 0 0
184 0 0 0
185 0 0 0
186 0 0 0
187 0 0 0
188 0 0 0
189 0 0 0
190 0 0 0
191 0 0 0
192 0 0 0
193 0 0 0
194 0 0 0
195 0 0 0
196 0 0 0
197 0 0 0
198 0 0 0
199 0 0 0
200 0 0 0
201 0 0 0
202 0 0 0
203 0 0 0
204 0 0 0
205 0 0 0
206 0 0 0
207 0 0 0
208 0 0 0
209 0 0 0
210 0 0 0
211 0 0 0
212 0 0 0
213 0 0 0
214 0 0 0
215 0 0 0
216 0 0 0
217 0 0 0
218 0 0 0
219 0 0 0
220 0 0 0
221 0 0 0
222 0 0 0
223 0 0 0
224 0 0 0
225 0 0 0
226 0 0 0
227 0 0 0
228 0 0 0
229 0 0 0
230 0 0 0
231 0 0 0
232 0 0 0
233 0 0 0
234 0 0 0
235 0 0 0
236 0 0 0
237 0 0 0
238 0 0 0
239 0 0 0
240 0 0 0
241 0 0 0
242 0 0 0
243 0 0 0
244 0 0 0
245 0 0 0
246 0 0 0
247 0 0 0
248 0 0 0
249 0 0 0
250 0 0 0
251 0 0 0
252 0 0 0
253 0 0 0
254 0 0 0
255 0 0 0

PuTTY.pal

# Palette
# Mode: RGB
0 0 0 0
1 187 0 0
2 0 187 0
3 187 187 0
4 0 0 187
5 187 0 187
6 0 187 187
7 187 187 187
8 85 85 85
9 255 85 85
10 85 255 85
11 255 255 85
12 85 85 255
13 255 85 255
14 85 255 255
15 255 255 255
16 0 0 0
17 0 0 0
18 0 0 0
19 0 0 0
20 0 0 0
21 0 0 0
22 0 0 0
23 0 0 0
24 0 0 0
25 0 0 0
26 0 0 0
27 0 0 0
28 0 0 0
29 0 0 0
30 0 0 0
31 0 0 0
32 0 0 0
33 0 0 0
34 0 0 0
35 0 0 0
36 0 0 0
37 0 0 0
38 0 0 0
39 0 0 0
40 0 0 0
41 0 0 0
42 0 0 0
43 0 0 0
44 0 0 0
45 0 0 0
46 0 0 0
47 0 0 0
48 0 0 0
49 0 0 0
50 0 0 0
51 0 0 0
52 0 0 0
53 0 0 0
54 0 0 0
55 0 0 0
56 0 0 0
57 0 0 0
58 0 0 0
59 0 0 0
60 0 0 0
61 0 0 0
62 0 0 0
63 0 0 0
64 0 0 0
65 0 0 0
66 0 0 0
67 0 0 0
68 0 0 0
69 0 0 0
70 0 0 0
71 0 0 0
72 0 0 0
73 0 0 0
74 0 0 0
75 0 0 0
76 0 0 0
77 0 0 0
78 0 0 0
79 0 0 0
80 0 0 0
81 0 0 0
82 0 0 0
83 0 0 0
84 0 0 0
85 0 0 0
86 0 0 0
87 0 0 0
88 0 0 0
89 0 0 0
90 0 0 0
91 0 0 0
92 0 0 0
93 0 0 0
94 0 0 0
95 0 0 0
96 0 0 0
97 0 0 0
98 0 0 0
99 0 0 0
100 0 0 0
101 0 0 0
102 0 0 0
103 0 0 0
104 0 0 0
105 0 0 0
106 0 0 0
107 0 0 0
108 0 0 0
109 0 0 0
110 0 0 0
111 0 0 0
112 0 0 0
113 0 0 0
114 0 0 0
115 0 0 0
116 0 0 0
117 0 0 0
118 0 0 0
119 0 0 0
120 0 0 0
121 0 0 0
122 0 0 0
123 0 0 0
124 0 0 0
125 0 0 0
126 0 0 0
127 0 0 0
128 0 0 0
129 0 0 0
130 0 0 0
131 0 0 0
132 0 0 0
133 0 0 0
134 0 0 0
135 0 0 0
136 0 0 0
137 0 0 0
138 0 0 0
139 0 0 0
140 0 0 0
141 0 0 0
142 0 0 0
143 0 0 0
144 0 0 0
145 0 0 0
146 0 0 0
147 0 0 0
148 0 0 0
149 0 0 0
150 0 0 0
151 0 0 0
152 0 0 0
153 0 0 0
154 0 0 0
155 0 0 0
156 0 0 0
157 0 0 0
158 0 0 0
159 0 0 0
160 0 0 0
161 0 0 0
162 0 0 0
163 0 0 0
164 0 0 0
165 0 0 0
166 0 0 0
167 0 0 0
168 0 0 0
169 0 0 0
170 0 0 0
171 0 0 0
172 0 0 0
173 0 0 0
174 0 0 0
175 0 0 0
176 0 0 0
177 0 0 0
178 0 0 0
179 0 0 0
180 0 0 0
181 0 0 0
182 0 0 0
183 0 0 0
184 0 0 0
185 0 0 0
186 0 0 0
187 0 0 0
188 0 0 0
189 0 0 0
190 0 0 0
191 0 0 0
192 0 0 0
193 0 0 0
194 0 0 0
195 0 0 0
196 0 0 0
197 0 0 0
198 0 0 0
199 0 0 0
200 0 0 0
201 0 0 0
202 0 0 0
203 0 0 0
204 0 0 0
205 0 0 0
206 0 0 0
207 0 0 0
208 0 0 0
209 0 0 0
210 0 0 0
211 0 0 0
212 0 0 0
213 0 0 0
214 0 0 0
215 0 0 0
216 0 0 0
217 0 0 0
218 0 0 0
219 0 0 0
220 0 0 0
221 0 0 0
222 0 0 0
223 0 0 0
224 0 0 0
225 0 0 0
226 0 0 0
227 0 0 0
228 0 0 0
229 0 0 0
230 0 0 0
231 0 0 0
232 0 0 0
233 0 0 0
234 0 0 0
235 0 0 0
236 0 0 0
237 0 0 0
238 0 0 0
239 0 0 0
240 0 0 0
241 0 0 0
242 0 0 0
243 0 0 0
244 0 0 0
245 0 0 0
246 0 0 0
247 0 0 0
248 0 0 0
249 0 0 0
250 0 0 0
251 0 0 0
252 0 0 0
253 0 0 0
254 0 0 0
255 0 0 0

PuTTY.png

Ubuntu-16_04.pal

# Palette
# Mode: RGB
0 46 52 54
1 204 0 0
2 78 154 6
3 196 160 0
4 52 101 164
5 117 80 123
6 6 152 154
7 211 215 207
8 85 87 83
9 239 41 41
10 138 226 52
11 252 233 79
12 114 159 207
13 173 127 168
14 52 226 226
15 238 238 236
16 0 0 0
17 0 0 0
18 0 0 0
19 0 0 0
20 0 0 0
21 0 0 0
22 0 0 0
23 0 0 0
24 0 0 0
25 0 0 0
26 0 0 0
27 0 0 0
28 0 0 0
29 0 0 0
30 0 0 0
31 0 0 0
32 0 0 0
33 0 0 0
34 0 0 0
35 0 0 0
36 0 0 0
37 0 0 0
38 0 0 0
39 0 0 0
40 0 0 0
41 0 0 0
42 0 0 0
43 0 0 0
44 0 0 0
45 0 0 0
46 0 0 0
47 0 0 0
48 0 0 0
49 0 0 0
50 0 0 0
51 0 0 0
52 0 0 0
53 0 0 0
54 0 0 0
55 0 0 0
56 0 0 0
57 0 0 0
58 0 0 0
59 0 0 0
60 0 0 0
61 0 0 0
62 0 0 0
63 0 0 0
64 0 0 0
65 0 0 0
66 0 0 0
67 0 0 0
68 0 0 0
69 0 0 0
70 0 0 0
71 0 0 0
72 0 0 0
73 0 0 0
74 0 0 0
75 0 0 0
76 0 0 0
77 0 0 0
78 0 0 0
79 0 0 0
80 0 0 0
81 0 0 0
82 0 0 0
83 0 0 0
84 0 0 0
85 0 0 0
86 0 0 0
87 0 0 0
88 0 0 0
89 0 0 0
90 0 0 0
91 0 0 0
92 0 0 0
93 0 0 0
94 0 0 0
95 0 0 0
96 0 0 0
97 0 0 0
98 0 0 0
99 0 0 0
100 0 0 0
101 0 0 0
102 0 0 0
103 0 0 0
104 0 0 0
105 0 0 0
106 0 0 0
107 0 0 0
108 0 0 0
109 0 0 0
110 0 0 0
111 0 0 0
112 0 0 0
113 0 0 0
114 0 0 0
115 0 0 0
116 0 0 0
117 0 0 0
118 0 0 0
119 0 0 0
120 0 0 0
121 0 0 0
122 0 0 0
123 0 0 0
124 0 0 0
125 0 0 0
126 0 0 0
127 0 0 0
128 0 0 0
129 0 0 0
130 0 0 0
131 0 0 0
132 0 0 0
133 0 0 0
134 0 0 0
135 0 0 0
136 0 0 0
137 0 0 0
138 0 0 0
139 0 0 0
140 0 0 0
141 0 0 0
142 0 0 0
143 0 0 0
144 0 0 0
145 0 0 0
146 0 0 0
147 0 0 0
148 0 0 0
149 0 0 0
150 0 0 0
151 0 0 0
152 0 0 0
153 0 0 0
154 0 0 0
155 0 0 0
156 0 0 0
157 0 0 0
158 0 0 0
159 0 0 0
160 0 0 0
161 0 0 0
162 0 0 0
163 0 0 0
164 0 0 0
165 0 0 0
166 0 0 0
167 0 0 0
168 0 0 0
169 0 0 0
170 0 0 0
171 0 0 0
172 0 0 0
173 0 0 0
174 0 0 0
175 0 0 0
176 0 0 0
177 0 0 0
178 0 0 0
179 0 0 0
180 0 0 0
181 0 0 0
182 0 0 0
183 0 0 0
184 0 0 0
185 0 0 0
186 0 0 0
187 0 0 0
188 0 0 0
189 0 0 0
190 0 0 0
191 0 0 0
192 0 0 0
193 0 0 0
194 0 0 0
195 0 0 0
196 0 0 0
197 0 0 0
198 0 0 0
199 0 0 0
200 0 0 0
201 0 0 0
202 0 0 0
203 0 0 0
204 0 0 0
205 0 0 0
206 0 0 0
207 0 0 0
208 0 0 0
209 0 0 0
210 0 0 0
211 0 0 0
212 0 0 0
213 0 0 0
214 0 0 0
215 0 0 0
216 0 0 0
217 0 0 0
218 0 0 0
219 0 0 0
220 0 0 0
221 0 0 0
222 0 0 0
223 0 0 0
224 0 0 0
225 0 0 0
226 0 0 0
227 0 0 0
228 0 0 0
229 0 0 0
230 0 0 0
231 0 0 0
232 0 0 0
233 0 0 0
234 0 0 0
235 0 0 0
236 0 0 0
237 0 0 0
238 0 0 0
239 0 0 0
240 0 0 0
241 0 0 0
242 0 0 0
243 0 0 0
244 0 0 0
245 0 0 0
246 0 0 0
247 0 0 0
248 0 0 0
249 0 0 0
250 0 0 0
251 0 0 0
252 0 0 0
253 0 0 0
254 0 0 0
255 0 0 0

Ubuntu-16_04.png