52 lines
1.5 KiB
Python
52 lines
1.5 KiB
Python
from PIL import Image
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import requests
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from io import BytesIO
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ASCII_CHARS = [ '#', '?', '%', '.', 'S', '+', '.', '*', ':', ',', '@']
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def scale_image(image, new_width=100):
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"""Resizes an image preserving the aspect ratio.
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"""
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(original_width, original_height) = image.size
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aspect_ratio = original_height/float(original_width)
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new_height = int(aspect_ratio * new_width)
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new_image = image.resize((new_width, new_height))
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return new_image
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def convert_to_grayscale(image):
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return image.convert('L')
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def map_pixels_to_ascii_chars(image, range_width=25):
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"""Maps each pixel to an ascii char based on the range
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in which it lies.
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0-255 is divided into 11 ranges of 25 pixels each.
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"""
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pixels_in_image = list(image.getdata())
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pixels_to_chars = [ASCII_CHARS[pixel_value/range_width] for pixel_value in
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pixels_in_image]
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return "".join(pixels_to_chars)
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def convert_image_to_ascii(image, new_width=100):
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image = scale_image(image)
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image = convert_to_grayscale(image)
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pixels_to_chars = map_pixels_to_ascii_chars(image)
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len_pixels_to_chars = len(pixels_to_chars)
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image_ascii = [pixels_to_chars[index: index + new_width] for index in
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xrange(0, len_pixels_to_chars, new_width)]
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return "\n".join(image_ascii)
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def handle_image_conversion(image_filepath):
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response = requests.get(image_filepath)
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image = Image.open(BytesIO(response.content))
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image_ascii = convert_image_to_ascii(image)
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return(image_ascii)
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