Quantize
20.9.0
Quantizes an input range.
template <typename TInput, typename TCompare = etl::less<TInput> >
class quantize : public etl::unary_function<TInput, TInput>
TInput The input data type.
TCompare The functor type used to compare values to the threshold. The default is etl::less
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quantize(const TInput* p_thresholds,
const TInput* p_quantizations,
size_t n_quantizations,
TCompare compare = TCompare())
p_thresholds A pointer to the list of threshold values.
p_quantizations A pointer to the list of quantization values. One more than the number of thresholds.
n_quantizations The number of quantization values.
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TInput operator()(TInput value) const
Threshold a value.
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Example
constexpr size_t Size = 20U;
constexpr size_t NThresholds = 4U;
std::array<int, NThresholds> thresholds =
{
14, 18, 22, 25
};
std::array<int, NThresholds + 1> quantizations =
{
1, 2, 3, 4, 5
};
std::array<int, Size> input =
{
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
};
std::array<int, Size> output;
etl::quantize<int> quantize(thresholds.data(), quantizations.data(), quantizations.size());
std::transform(input.begin(), input.end(), output.begin(), quantize);
// output = 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 5