scroll- irc bot to play ascii art |
git clone git://git.acid.vegas/scroll.git |
Log | Files | Refs | Archive | README | LICENSE |
img2irc.py (6240B)
1 #!/usr/bin/env python 2 # Scroll IRC Art Bot - Developed by acidvegas in Python (https://git.acid.vegas/scroll) 3 4 ''' 5 Props: 6 - forked idea from malcom's img2irc (https://github.com/waveplate/img2irc) 7 - big props to wrk (wr34k) for forking this + opencv implementation 8 ''' 9 10 try: 11 import cv2 12 except ImportError: 13 raise SystemExit('missing required \'opencv-python\' library (https://pypi.org/project/opencv-python/)') 14 try: 15 import numpy as np 16 except ImportError: 17 raise SystemExit('missing required \'numpy\' library (https://pypi.org/project/numpy/)') 18 19 palettes = { 20 'RGB16': [0xffffff, 0x000000, 0x00007f, 0x009300, 0xff0000, 0x7f0000, 0x9c009c, 0xfc7f00, 21 0xffff00, 0x00fc00, 0x009393, 0x00ffff, 0x0000fc, 0xff00ff, 0x0, 0x0], 22 'RGB88': [0xffffff, 0x000000, 0x00007f, 0x009300, 0xff0000, 0x7f0000, 0x9c009c, 0xfc7f00, 23 0xffff00, 0x00fc00, 0x009393, 0x00ffff, 0x0000fc, 0xff00ff, 0x0, 0x0, 24 0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472c, 0x004747, 0x002747, 25 0x000047, 0x2e0047, 0x470047, 0x47002a, 0x740000, 0x743a00, 0x747400, 0x517400, 26 0x007400, 0x007449, 0x007474, 0x004074, 0x000074, 0x4b0074, 0x740074, 0x740045, 27 0xb50000, 0xb56300, 0xb5b500, 0x7db500, 0x00b500, 0x00b571, 0x00b5b5, 0x0063b5, 28 0x0000b5, 0x7500b5, 0xb500b5, 0xb5006b, 0xff0000, 0xff8c00, 0xffff00, 0xb2ff00, 29 0x00ff00, 0x00ffa0, 0x00ffff, 0x008cff, 0x0000ff, 0xa500ff, 0xff00ff, 0xff0098, 30 0xff5959, 0xffb459, 0xffff71, 0xcfff60, 0x6fff6f, 0x65ffc9, 0x6dffff, 0x59b4ff, 31 0x5959ff, 0xc459ff, 0xff66ff, 0xff59bc, 0xff9c9c, 0xffd39c, 0xffff9c, 0xe2ff9c, 32 0x9cff9c, 0x9cffdb, 0x9cffff, 0x9cd3ff, 0x9c9cff, 0xdc9cff, 0xff9cff, 0xff94d3], 33 'RGB99': [0xffffff, 0x000000, 0x00007f, 0x009300, 0xff0000, 0x7f0000, 0x9c009c, 0xfc7f00, 34 0xffff00, 0x00fc00, 0x009393, 0x00ffff, 0x0000fc, 0xff00ff, 0x7f7f7f, 0xd2d2d2, 35 0x470000, 0x472100, 0x474700, 0x324700, 0x004700, 0x00472c, 0x004747, 0x002747, 36 0x000047, 0x2e0047, 0x470047, 0x47002a, 0x740000, 0x743a00, 0x747400, 0x517400, 37 0x007400, 0x007449, 0x007474, 0x004074, 0x000074, 0x4b0074, 0x740074, 0x740045, 38 0xb50000, 0xb56300, 0xb5b500, 0x7db500, 0x00b500, 0x00b571, 0x00b5b5, 0x0063b5, 39 0x0000b5, 0x7500b5, 0xb500b5, 0xb5006b, 0xff0000, 0xff8c00, 0xffff00, 0xb2ff00, 40 0x00ff00, 0x00ffa0, 0x00ffff, 0x008cff, 0x0000ff, 0xa500ff, 0xff00ff, 0xff0098, 41 0xff5959, 0xffb459, 0xffff71, 0xcfff60, 0x6fff6f, 0x65ffc9, 0x6dffff, 0x59b4ff, 42 0x5959ff, 0xc459ff, 0xff66ff, 0xff59bc, 0xff9c9c, 0xffd39c, 0xffff9c, 0xe2ff9c, 43 0x9cff9c, 0x9cffdb, 0x9cffff, 0x9cd3ff, 0x9c9cff, 0xdc9cff, 0xff9cff, 0xff94d3, 44 0x000000, 0x131313, 0x282828, 0x363636, 0x4d4d4d, 0x656565, 0x818181, 0x9f9f9f, 45 0xbcbcbc, 0xe2e2e2, 0xffffff] 46 } 47 48 def convert(data, max_line_len, img_width=80, palette='RGB99', quantize_colors=None): 49 if palette not in palettes: 50 raise Exception('invalid palette option') 51 palette = palettes[palette] 52 np_arr = np.asarray(bytearray(data), dtype="uint8") 53 image = cv2.imdecode(np_arr, cv2.IMREAD_COLOR) 54 del data 55 return convert_image(image, quantize_colors, max_line_len, img_width, palette) 56 57 def convert_image(orig_image, quantize_colors, max_line_len, img_width, palette): 58 image = ircize(orig_image, img_width, quantize_colors) 59 CHAR = '\u2580' 60 buf = list() 61 for i in range(0, image.shape[0], 2): 62 if i+1 >= image.shape[0]: 63 bitmap = [[bgr_to_hex(image[i, x]) for x in range(image.shape[1])]] 64 bitmap += [[0 for _ in range(image.shape[1])]] 65 else: 66 bitmap = [[bgr_to_hex(image[y, x]) for x in range(image.shape[1])] for y in [i, i+1]] 67 top_row = [AnsiPixel(px, palette) for px in bitmap[0]] 68 bottom_row = [AnsiPixel(px, palette) for px in bitmap[1]] 69 buf += [""] 70 last_fg = last_bg = -1 71 ansi_row = list() 72 for j in range(image.shape[1]): 73 top_pixel = top_row[j] 74 bottom_pixel = bottom_row[j] 75 pixel_pair = AnsiPixelPair(top_pixel, bottom_pixel) 76 fg = pixel_pair.top.irc 77 bg = pixel_pair.bottom.irc 78 if j != 0: 79 if fg == last_fg and bg == last_bg: 80 buf[-1] += CHAR 81 elif bg == last_bg: 82 buf[-1] += f'\x03{fg}{CHAR}' 83 else: 84 buf[-1] += f'\x03{fg},{bg}{CHAR}' 85 else: 86 buf[-1] += f'\x03{fg},{bg}{CHAR}' 87 last_fg = fg 88 last_bg = bg 89 if len(buf[-1].encode('utf-8', 'ignore')) > max_line_len: 90 if img_width - 5 < 5: 91 raise Exception('image would get too small') 92 return convert_image(orig_image, quantize_colors, max_line_len, img_width-5, palette) 93 return buf 94 95 def ircize(image, img_width, quantize_colors): 96 (height, width, _) = image.shape 97 img_height = img_width / width * height 98 image = cv2.resize(image, (int(img_width), int(img_height)), interpolation=cv2.INTER_AREA) 99 brightness = np.sum(image) / (255 * image.shape[0] * image.shape[1]) 100 minimum_brightness = 0.72 101 ratio = brightness / minimum_brightness 102 if ratio < 1: 103 image = cv2.convertScaleAbs(image, alpha = 1 / ratio, beta = 0) 104 imgf = np.float32(image).reshape(-1, 3) 105 criteria = (cv2.TERM_CRITERIA_EPS+cv2.TERM_CRITERIA_MAX_ITER,20,2.0) 106 compactness, label, center = cv2.kmeans(imgf, quantize_colors, None, criteria, 10, cv2.KMEANS_RANDOM_CENTERS) 107 center = np.uint8(center) 108 final_img = center[label.flatten()] 109 image = final_img.reshape(image.shape) 110 return image 111 112 def hex_to_rgb(color): 113 r = (color >> 16) & 255 114 g = (color >> 8) & 255 115 b = color & 255 116 return (r,g,b) 117 118 def rgb_to_hex(rgb): 119 if len(list(rgb)) < 3: 120 r = g = b = rgb[0] 121 else: 122 r = rgb[0] 123 g = rgb[1] 124 b = rgb[2] 125 126 return (r << 16) + (g << 8) + b 127 128 def bgr_to_hex(bgr): 129 return rgb_to_hex((bgr[0], 0, 0)) if len(list(bgr)) < 3 else rgb_to_hex((bgr[2], bgr[1], bgr[0])) 130 131 def color_distance_squared(c1, c2): 132 d1 = abs(c1[0] - c2[0]) 133 d2 = abs(c1[1] - c2[1]) 134 d3 = abs(c1[2] - c2[2]) 135 return d1 * d1 + d2 * d2 + d3 * d3 136 137 class AnsiPixel: 138 def __init__(self, pixel_u32, palette): 139 self.irc = self.nearest_hex_color(pixel_u32, palette) 140 141 def nearest_hex_color(self, pixel_u32, hex_colors): 142 rgb_colors = [hex_to_rgb(color) for color in hex_colors] 143 rgb_colors.sort(key=lambda rgb: color_distance_squared(hex_to_rgb(pixel_u32), rgb)) 144 hex_color = rgb_to_hex(rgb_colors[0]) 145 return hex_colors.index(hex_color) 146 147 class AnsiPixelPair: 148 def __init__(self, top, bottom): 149 self.top = top 150 self.bottom = bottom