25 lines
784 B
Python
25 lines
784 B
Python
from typing import Iterable
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from PIL import Image
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from image_prediction.encoder.encoder import Encoder
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class HashEncoder(Encoder):
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def encode(self, images: Iterable[Image.Image]):
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yield from map(hash_image, images)
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def __call__(self, images: Iterable[Image.Image], batch_size=16):
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yield from self.encode(images)
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def hash_image(image: Image.Image):
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"""See: https://stackoverflow.com/a/49692185/3578468"""
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image = image.resize((10, 10), Image.ANTIALIAS)
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image = image.convert("L")
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pixel_data = list(image.getdata())
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avg_pixel = sum(pixel_data) / len(pixel_data)
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bits = "".join(["1" if (px >= avg_pixel) else "0" for px in pixel_data])
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hex_representation = str(hex(int(bits, 2)))[2:][::-1].upper()
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return hex_representation
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