Method ComputeDynamicValues

src/KinectSource.cpp:382–398

}

auto KinectSource::ComputeDynamicValues(const std::uint16_t* values, std::size_t valueCount) -> DynamicValues
{
	constexpr std::uint16_t MaxValue = std::numeric_limits<std::uint16_t>::max();

	unsigned long long average = std::accumulate(values, values + valueCount, 0LL) / valueCount;
	unsigned long long varianceAcc = std::accumulate(values, values + valueCount, 0LL, [average](unsigned long long init, unsigned long long delta)
	{
		return init + (delta - average) * (delta - average); // underflow allowed (will overflow back to the right value)
	});

	double variance = double(varianceAcc) / valueCount;

	double averageValue = double(average) / MaxValue;
	double standardDeviation = std::sqrt(variance / MaxValue);

	return { averageValue, standardDeviation };
}