▁scene ▁space ▁color ▁enc od ings ▁known ▁as ▁R I MM ▁R GB ▁intended ▁to ▁encode ▁standard ▁dynamic ▁range ▁scene ▁space ▁images , ▁and ▁E RI MM ▁R GB ▁intended ▁to ▁encode ▁extended ▁dynamic - range ▁scene ▁space ▁images . ▁ ▁Development ▁ ▁The ▁development ▁of ▁Pro Photo ▁R GB ▁and ▁other ▁color ▁spaces ▁is ▁documented ▁in ▁an ▁article ▁summar izing ▁a ▁presentation ▁by ▁one ▁of ▁its ▁developers ▁Dr . ▁Geoff ▁Wol fe ▁at ▁K od ak , ▁now ▁Senior ▁Research ▁Manager ▁at ▁Can on ▁Information ▁Systems ▁Research ▁Australia , ▁at ▁the ▁IS & T / S PI E ▁Color ▁Im aging ▁Conference ▁in ▁ 2 0 1 1 . ▁ ▁Pro Photo ▁R GB ▁( ROM M ▁R GB ) ▁Enc oding ▁Prim aries ▁ ▁View ing ▁environment ▁▁ ▁L umin ance ▁level ▁is ▁in ▁the ▁range ▁of ▁ 1 6 0 – 6 4 0   cd / m 2 . ▁ ▁View ing ▁surr ound ▁is ▁average . ▁ ▁There ▁is ▁ 0 . 5 – 1 . 0 % ▁view ing ▁f lare . ▁ ▁The ▁adapt ive ▁white ▁point ▁is ▁specified ▁by ▁the ▁chrom atic ity ▁values ▁for ▁C IE ▁Standard ▁ill umin ant ▁D 5 0 ▁( x ▁= ▁ 0 . 3 4 5 7 0 4 , ▁y ▁= ▁ 0 . 3 5 8 5 4 0 ). ▁ ▁The ▁image ▁color ▁values ▁are ▁assumed ▁to ▁be ▁encoded ▁using ▁f lare less ▁( or ▁f lare ▁corrected ) ▁color imet ric ▁measurements ▁based ▁on