Generating ASCII art from images using Python3 and PIL (Python Image Library)
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| from PIL import Image
import os
ASCII_CHARS = [ '#', '?', '%', '.', 'S', '+', '.', '*', ':', ',', '@']
def scale_image(image, new_width=100):
"""Resizes an image preserving the aspect ratio.
"""
(original_width, original_height) = image.size
aspect_ratio = original_height/float(original_width)
new_height = int(aspect_ratio * new_width)
new_image = image.resize((new_width, new_height))
return new_image
def convert_to_grayscale(image):
return image.convert('L')
def map_pixels_to_ascii_chars(image, range_width=25):
"""Maps each pixel to an ascii char based on the range
in which it lies.
0-255 is divided into 11 ranges of 25 pixels each.
"""
pixels_in_image = list(image.getdata())
pixels_to_chars = [ASCII_CHARS[pixel_value//range_width] for pixel_value in
pixels_in_image]
return "".join(pixels_to_chars)
def convert_image_to_ascii(image, new_width=100):
image = scale_image(image)
image = convert_to_grayscale(image)
pixels_to_chars = map_pixels_to_ascii_chars(image)
len_pixels_to_chars = len(pixels_to_chars)
image_ascii = [pixels_to_chars[index: index + new_width] for index in
range(0, len_pixels_to_chars, new_width)]
return "\n".join(image_ascii)
def handle_image_conversion(image_filepath):
image = None
try:
image = Image.open(image_filepath)
except Exception as e:
print("Unable to open image file {image_filepath}.".format(image_filepath=image_filepath))
print(e)
return
image_ascii = convert_image_to_ascii(image)
f = open(os.path.splitext(image_filepath)[0]+'.txt','w')
f.write(image_ascii)
f.close()
if __name__=='__main__':
import sys
image_file_path = 'your_path/to_your_image/goes_here.png'
handle_image_conversion(image_file_path) |
