Yes, usually green multiplier Yes, usually green multiplier is set to 1.0 (green is most strong channel unless very warm light is used), so you may scale only red/blue channels. BTW, if SSE or AVX (vectorized) instructions are used to apply WB, it is cheaper to multiply green to 1.0 than split-multiply-join the pixel data. -- Alex Tutubalin @LibRaw LLC reply
Yes, usually green multiplier is set to 1.0 (green is most strong channel unless very warm light is used), so you may scale only red/blue channels.
BTW, if SSE or AVX (vectorized) instructions are used to apply WB, it is cheaper to multiply green to 1.0 than split-multiply-join the pixel data.