// Logarithmic transfer function
// Generated using..
// map(lambda x: int(math.log(x) * 255 / 2.2), numpy.linspace(1, math.exp(2.2), 256))

const uint8_t log_lookup[] PROGMEM = {
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 139,
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 141,
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 155,
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 165,
 166,
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 168,
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 170,
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 255
};