color_math.h File Reference

Color-temperature and RGB conversion helpers for Smart LEDZ v1. More...

#include <array>
#include <cstdint>

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Functions
std::array< uint8_t, 3 >	smartledz_protocol::v1::lookup_ct_rgb (uint16_t kelvin, float duv)
	Converts correlated color temperature and Duv into RGB.
uint16_t	smartledz_protocol::v1::estimate_cct_from_rgb (uint8_t target_red, uint8_t target_green, uint8_t target_blue, float duv)
	Estimates correlated color temperature from an RGB sample.

Detailed Description

Color-temperature and RGB conversion helpers for Smart LEDZ v1.

Function Documentation

estimate_cct_from_rgb()

uint16_t smartledz_protocol::v1::estimate_cct_from_rgb	(	uint8_t	target_red,
		uint8_t	target_green,
		uint8_t	target_blue,
		float	duv
	)

Estimates correlated color temperature from an RGB sample.

Parameters

target_red	Red channel of the target sample.
target_green	Green channel of the target sample.
target_blue	Blue channel of the target sample.
duv	Duv offset used by the fitted model.

Returns

Estimated kelvin value in the modeled range.

Note

Uses coarse (100K) then fine (1K) search over [1800, 12000].

lookup_ct_rgb()

std::array< uint8_t, 3 > smartledz_protocol::v1::lookup_ct_rgb	(	uint16_t	kelvin,
		float	duv
	)

Converts correlated color temperature and Duv into RGB.

Parameters

kelvin	Correlated color temperature in kelvin.
duv	Duv offset used by the fitted model.

Returns

RGB tuple in 8-bit channels.

Note

kelvin is clamped to [1800, 12000] and duv to [-6.0, 6.0].