add code

Author: itdoudoutech

doudou/2020-05-17-character-drawing/image_to_chars.py

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+from PIL import Image
+
+WIDTH, HEIGHT = 80, 40
+ascii_char = list("$@B%8&WM#*oahkbdpqwmZO0QLCJUYXzcvunxrjft/\|()1{}[]?-_+~<>i!lI;:,\"^`'. ")
+
+
+def get_char_by_rgb(r, g, b, alpha=256):
+    if alpha == 0:
+        return ' '
+    length = len(ascii_char)
+    gray = int(0.2126 * r + 0.7152 * g + 0.0722 * b)
+    unit = 256.0 / length
+    return ascii_char[int(gray / unit)]
+
+
+def process_image(image_path, file_path='out.txt'):
+    img = Image.open(image_path)
+    img = img.resize((WIDTH, HEIGHT))
+    width, height = img.size
+    txt = ""
+    for x in range(height):
+        for y in range(width):
+            txt += get_char_by_rgb(*img.getpixel((y, x)))
+        txt += '\n'
+
+    with open(file_path, 'w') as f:
+        f.write(txt)
+    print(txt)
+
+
+if __name__ == '__main__':
+    image_path, file_path = '/tmp/qq.jpg', '/tmp/qq.txt'
+    process_image(image_path, file_path)