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@@ -78,7 +78,17 @@ def extract_image(path):
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for j in range(cols):
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r, g, b = im[i, j]
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- data.append(((r << 16) + (g << 8) + b) & 255)
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+ byte = 0
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+ byte |= 1 << (r & 1)
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+ byte |= 1 << ((r >> 1) & 1)
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+ byte |= 1 << ((g >> 1) & 1)
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+ byte |= 1 << ((g >> 1) & 1)
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+ byte |= 1 << ((b >> 1) & 1)
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+ byte |= 1 << ((b >> 1) & 1)
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+ byte |= 1 << ((r >> 2) & 1)
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+ byte |= 1 << ((r >> 2) & 1)
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+
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+ data.append(byte & 255)
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return bytes(data)
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@@ -122,7 +132,7 @@ def extract_lsbs(data):
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tmp_byte = 0
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for byte in chunk:
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for n in range(4):
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- tmp_byte = (tmp_byte << 1) | ((byte >> n) & 1)
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+ tmp_byte |= 1 << ((byte >> n) & 1)
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buffer.append(tmp_byte & 255)
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