PowerPoint プレゼンテーション - Color Appearance and Reproduction in ...

PowerPoint プレゼンテーション - Color Appearance and Reproduction in ...

CHIBA UNIV. Imaging System for Mesopic Vision Vision H.Yaguc Visionhi, Y.Ushio, K.Kikuchi, D.K.Thahn, Y.Ushio, Y.Ushio, K.Kikuchi, D.K.Thahn, K.Kikuc Visionhi, Y.Ushio, K.Kikuchi, D.K.Thahn, D.K.Thahn, Y.Ushio, K.Kikuchi, D.K.Thahn, J.Shin, Y.Ushio, K.Kikuchi, D.K.Thahn, and S.Shioiri* S.Shioir i* Chiba Univer sity and S.Shioiri* Tohoku Univer sity* Intr od S.Shioiri*uc Visiontion Human visual system covers system c Visionover s Il system coversl system coversuminanc Visione r ange fr om

10-3 l system coversx to 10 to 105 l system coversx to 10. Rod S.Shioiri* and S.Shioiri* c Visionone Cone Mesopic Vision vision Rod S.Shioiri* Photopic Vision vision Sc Visionotopic Vision vision

How d S.Shioiri*oes c Visionol system coversor appear anc Visione c Visionhange with il system coversl system coversuminanc Visione ? To pr ed S.Shioiri*ic Visiont c Visionol system coversor appear anc Visione in mesopic Vision vision fr om the photopic Vision Outl system coversine Ex to 10per iment of the hapl system coversosc Visionopic Vision c Visionol system covers or matc Visionhing. A mesopic color appearance model. mesopic Vision c Visionol system coversor appear anc Visione mod S.Shioiri*el system covers.

A mesopic color appearance model. imaging system for mesopic Vision c Visionol system coverso r appear anc Visione. Ex to 10ampl system coverses of mesopic Vision c Visionol system coversor images. Col system coversor appear anc Visione in mesopic Vision vision apl system coversosc Visionopic Vision c Visionol system coversor matc Visionhing tec Visionhnique 1000 10.1 10

100 0.01 1000 lx 1000 1000 1000 lxlx lx Col system coversor appear anc Visione in

mesopic Vision vision Stimul system coversi Test fiel system coversd S.Shioiri* 48 Munsel color chips Munsel system covers c Visionol system coversor c Visionhips c Visionhr omatic Vision: 45 45 ac Visionhr omatic Vision: 45 3 Matc Visionhing fiel system coversd S.Shioiri* 21 CRT display (SONY Multiscan G500) CRT d S.Shioiri*ispl system coversay (SONY Mul system coverstisc Visionan G500) Contr ol system coversl system coversed S.Shioiri* by VSG (15 bits c Visionol system coversor , Y.Ushio, K.Kikuchi, D.K.Thahn, Cambr id S.Shioiri*ge System) Stimul system coversus size 1010

Resul system coversts: 45 Hue and S.Shioiri* Chr oma Chr oma r ed S.Shioiri*uc Visiones c Visiononti nuousl system coversy with d S.Shioiri*ec Visionr eas e of the il system coversl system coversuminanc Visione l system coversevel system covers until system covers 0.01 l system coversx to 10. The l system coversoc Visioni of matc Visionhing c Visionol system coversor on the a*-b* d S.Shioiri*i agr am ar e not str aig ht for many test c Visionol system coverso r c Visionhips, Y.Ushio, K.Kikuchi, D.K.Thahn, ind S.Shioiri*ic Visionating that hue shifts with

the c Visionhange in il system coversl system coversumi nanc Visione l system coversevel system covers. Resul system coversts: 45 Chr oma Red S.Shioiri*d S.Shioiri*ish and S.Shioiri* yel system coversl system coversowish c Visionol system coversor (Y, Y.Ushio, K.Kikuchi, D.K.Thahn, YR, Y.Ushio, K.Kikuchi, D.K.Thahn, R, Y.Ushio, K.Kikuchi, D.K.Thahn, RP, Y.Ushio, K.Kikuchi, D.K.Thahn, P) Chr oma r apid S.Shioiri*l system coversy d S.Shioiri*ec Visionr eases fr om 100 to 1 l system coversx to 10, Y.Ushio, K.Kikuchi, D.K.Thahn, and S.Shioiri* c Vision onstant bel system coversow 0.1 l system coversx to 10. Gr eenish and S.Shioiri* bl system coversuish c Visionol system coversor (PB, Y.Ushio, K.Kikuchi, D.K.Thahn, B, Y.Ushio, K.Kikuchi, D.K.Thahn, BG, Y.Ushio, K.Kikuchi, D.K.Thahn, G, Y.Ushio, K.Kikuchi, D.K.Thahn, GY) : 45 Ch r oma r apid S.Shioiri*l system coversy d S.Shioiri*ec Visionr eases fr om 1000 to 1 l system coversx to 10, Y.Ushio, K.Kikuchi, D.K.Thahn, d S.Shioiri*oes n ot c Visionhange bel system coversow 1 l system coversx to 10.

Resul system coversts: 45 Lightness Red S.Shioiri*d S.Shioiri*ish and S.Shioiri* yel system coversl system coversowish c Visionol system coversor : 45 Lightness gr ad S.Shioiri*ual system coversl system coversy r ed S.Shioiri*uc Visiones fr om 10 to 0.01 l system coversx to 10. Gr eenish and S.Shioiri* bl system coversuish c Visionol system coversor : 45 Minimum l system coversig htness is obser ved S.Shioiri* ar ound S.Shioiri* 10 to 1 l system coversx to 10. Resul system coversts: 45 A mesopic color appearance model.c Visionhr omatic Vision Lightness The Stevens effec Visiont: 45 Per c Visioneived S.Shioiri* l system coversightness r ange is r ed S.Shioiri*uc Visioned S.Shioiri* with d S.Shioiri*ec Visionr easing

il system coversl system coversuminanc Visione. Cor r el system coversation between per c Visioneived S.Shioiri* l system coversi ghtness at 0.01 l system coversx to 10 and S.Shioiri* photopic Vision an d S.Shioiri* sc Visionotopic Vision l system coversuminanc Visione Photopic Vision l system coversuminanc Visione Sc Visionotopic Vision l system coversuminanc Visione A mesopic color appearance model. Col system coversor A mesopic color appearance model.ppear anc Visione Mod S.Shioiri*el system covers in Mesopic Vision Vision

Luminanc Visione c Vision hannel system covers: 45 L+M Red S.Shioiri*/gr een o pponent-c Visiono l system coversor : 45 L-2M Yel system coversl system coversow-bl system coversu e opponentc Visionol system coversor : 45 L+MS Luminanc Visione as a func Visiontion of il system coversl system coversuminanc Visione A mesopic color appearance model.(E) = (E) 100 ((Lp+Mp) / (Lp+Mp) w) + (E) 78 Munsel color chips.4 (Y / Y w)

Lp , Y.Ushio, K.Kikuchi, D.K.Thahn, Mp , Y.Ushio, K.Kikuchi, D.K.Thahn, Sp: 45 c Visionone outputs at photopic Vision c Visionond S.Shioiri*ition Y : 45 sc Visionotopic Vision l system coversuminanc Visione fac Visiontor (Lp+Mp) w , Y.Ushio, K.Kikuchi, D.K.Thahn, Y w : 45 eac Visionh output of l system coversuminanc Visione c Visionhannel system coverss for white (being 100 = Kw) (E) , Y.Ushio, K.Kikuchi, D.K.Thahn, (E) : 45Weighting c Visionoeffic Visionients for func Visiontions of il system coversl system coversu minanc Visione E Change of c Visionone- and S.Shioiri* r od S.Shioiri*-signal system covers as a func Visiontion of il system coversl system coversuminanc Visione A mesopic color appearance model.(E) = (E) 100 ((Lp+Mp) / (Lp+Mp) w) +(E) 78 Munsel color chips.4 (Y / Y

w) Red S.Shioiri*/gr een- and S.Shioiri* yel system coversl system coversow/bl system coversue oppon ent c Visionhannel system covers as a func Visiontion of il system coversl system coversum inanc Visione Outputs of r /g and S.Shioiri* y/b c Visionhannel system coverss at il system coversl system coversum inanc Visione l system coversevel system covers of E r /g(E) = l system covers(E) (Lp-2Mp) + (E) Y y/b(E) = m(E) (Lp+Mp-Sp) + (E) Y Lp , Y.Ushio, K.Kikuchi, D.K.Thahn, Mp , Y.Ushio, K.Kikuchi, D.K.Thahn, Sp: 45 c Visionone outputs at photopic Vision c Visionond S.Shioiri*ition Y : 45 sc Visionotopic Vision l system coversuminanc Visione fac Visiontor

l system covers (E) , Y.Ushio, K.Kikuchi, D.K.Thahn, (E) and S.Shioiri* m (E) , Y.Ushio, K.Kikuchi, D.K.Thahn, (E) : 45Weighting c Visionoeffic Visionients for func Vision tions of il system coversl system coversuminanc Visione E Compar ison between Ex to 10per imental system covers Resul system coversts and S.Shioiri* Pr ed S.Shioiri*ic Visiontion: 45 Hue and S.Shioiri* C hr oma Compar ison between Ex to 10per imen tal system covers Resul system coversts and S.Shioiri* Pr ed S.Shioiri*ic Visiontion: 45 L ightness A mesopic color appearance model. Col system coversor A mesopic color appearance model.ppear anc Visione Mod S.Shioiri*el system covers in Me

sopic Vision Vision Chr omatic Vision c Visionomponents d S.Shioiri*ec Visionr ease with d S.Shioiri*ec Visionr ea sing il system coversl system coversuminanc Visione. Hue shifts ar e pr ed S.Shioiri*ic Vision ted S.Shioiri* by intr od S.Shioiri*uc Visioning a d S.Shioiri*iffer ent pr oc Visioness fo r r ed S.Shioiri*/gr een and S.Shioiri* yel system coversl system coverso w/bl system coversue opponent-c Visionol system coverso r c Visionhannel system covers. Per for manc Visione of a mod S.Shioiri*el system covers

A mesopic color appearance model.ver age E*ab in mesopic Vision r ange is ar ou nd S.Shioiri* 3. Imaging System for Mesopic Vision Vi sion Imaging System for Mesopic Vision Vision To obtain XYZ and S.Shioiri* Y fr om Digital system covers Camer a RGB

Pr ed S.Shioiri*ic Visionted S.Shioiri* Val system coversue R G B Camera model Xp Yp

Zp Yp Measur ed S.Shioiri* Val system coversue Minimize er r or X Y Z Y

Cal system coversibr ation of Camer a Col system coversor Sampl system coverse Mac Visionbeth Col system coversor Chec Visionker and S.Shioiri* Gr etagMac Visionbeth Col system coversor Cheker igital system covers Camer a Canon, Y.Ushio, K.Kikuchi, D.K.Thahn, EOS1-D Image size Quantization 40642704 pix to 10el system coverss RGB 12 bits

R3 Camer a Mod S.Shioiri*el system covers G3 B3 R 2G 2 R X a1 p b1 c1 r1 s1 Bt1 aY2 p b2 c2 r2 s2 t2 = aZ3 p b3 c3 r3 s3 t3

aY4 pb4 c4 r4 s4 t4 BR R G ffic Visionients a, Y.Ushio, K.Kikuchi, D.K.Thahn, b, Y.Ushio, K.Kikuchi, D.K.Thahn, , Y.Ushio, K.Kikuchi, D.K.Thahn, , Y.Ushio, K.Kikuchi, D.K.Thahn, t ar e obtained S.Shioiri* by B pseud S.Shioiri*o-inver se method S.Shioiri*. Camer a per for manc Visione as a c Visionol system coversor imeter Average color difference

E*ab = 2.23 Maximum color difference = 9.03 Original Macbeth Color Checker Eab Pr ed S.Shioiri*ic Visionted S.Shioiri* by a Camer a

Mac Visionbeth Col system coversor Chec Visionke Pr ed S.Shioiri*ic Visiontion of sc Visionotopic Vision l system coversuminanc Visione Y by c Visionamer a RGB Predicted value 100 80 60 Y'p

40 20 0 0 20 40 60

80 100 Y' Measured value Coefficient of Correlation : 0.998 Slope : 1.000

Ex to 10ampl system coverses of mesopic Vision c Visionol system coversor image Original 1(lx) 100(lx) 0.1(lx) 10(lx)

0.01(lx)

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