Gamma

20.9.0

There are two gamma functors, gamma_encode and gamma_decode.

template <typename TInput>

class gamma_encode : public etl::unary_function<TInput, TInput>

template <typename TInput>

class gamma_decode : public etl::unary_function<TInput, TInput>

TInput The input data type.

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gamma_encode(double gamma, TInput maximum)

Constructor.

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TInput operator()(TInput value) const

Threshold a value.

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gamma_decode(double gamma, TInput maximum)

Constructor.

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TInput operator()(TInput value) const

Threshold a value.

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Example

std::array<double, 10> input

{

0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0

};

std::array<double, 10> output_encode;

etl::gamma_encode<double> gamma_encode(0.5, 9.0);

std::transform(input.begin(), input.end(), output_encode.begin(), gamma_encode);

// output_encode == 0.0, 0.11, 0.44, 1.00, 1.78, 2.78, 4.00, 5.44, 7.11, 9.00

std::array<double, 10> output_decode;

etl::gamma_decode<double> gamma_decode(0.5, 9.0);

std::transform(output_encode.begin(), output_encode.end(), output_decode.begin(), gamma_decode);

// output_decode == 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0

gamma.h