function XYZ=XYZ_fromSR(SR,S,deg)% 由光谱反射率计算颜色的三刺激值% 输入参数：% SR--光谱反射率，n×2的矩阵，第一列是波长，第2~m列是光谱反射率数据% S－光源，'A'表示A光源，'C'表示C光源，'D50','D55','D65','D75',默认D65% deg--视场，2表示2°视场，10表示10°视场，默认2°视场% 输出参数：% XYZ－颜色的三刺激值%% 编写： % 2007-8-28% if nargin==0 % 如果没有参数 dis('请输入光谱反射率数据，注意是n×2的矩阵，第一列是波长，第2列是光谱反射率数据'); return;else if nargin ==1 % 如果 是一个参数 Illcode = 'D65' ; % 光源默认为D65 degcode = 2; % 默认2°视场 else if nargin ==2 % 如果 是二个参数 视场默认2° Illcode = S; % 光源 degcode = 2; % 默认2°视场 else if nargin ==3 % 如果 是3个参数 Illcode = S; % 光源 degcode = deg; % 2°视场 else Illcode = 'D65' ; % 光源默认为D65 degcode = 2; % 默认2°视场 end end endend % 获得光源的相对光谱功率分布 RSPD=getRSPD(Illcode);% 获得CIE标准观察者的数据if degcode== 10 CIE_Std = CIE1964Std_XYZ; else CIE_Std = CIE1931Std_XYZ; end % SR和RSPD波长的范围和间隔可能不一样，下面找出两者共有的波长[comn,iColorS,iIll] = intersect(SR(:,1),RSPD(:,1));% SR和RSPD以及CIE_Std波长的范围和间隔可能不一样，下面找出3者共有的波长[comn,iCIE_Std,ic] = intersect(CIE_Std(:,1),comn);[c,iSR,ic] = intersect(SR(:,1),comn);[c,iRSPD,ic] = intersect(RSPD(:,1),comn);if RSPD(iRSPD,2)==0 XYZ= [0 0 0]; returnend K=100/sum(RSPD(iRSPD,2).CIE_Std(iCIE_Std,3)); % 计算K值 [a,sample_num]=size(SR);XYZ=zeros(sample_num-1,3);for ii=2:sample_num Xt=Ksum(RSPD(iRSPD,2).CIE_Std(iCIE_Std,2).SR(iSR,ii)); % 计算X刺激值 Yt=Ksum(RSPD(iRSPD,2).CIE_Std(iCIE_Std,3).SR(iSR,ii)); % 计算Y刺激值 Zt=Ksum(RSPD(iRSPD,2).CIE_Std(iCIE_Std,4).SR(iSR,ii)); % 计算Z刺激值 XYZ(ii-1,:)=[Xt,Yt,Zt];end
getRSPD.m 文件如下：
function RSPD=getRSPD(illuCode)%% 获得光源的相对光谱功率分布数据% 输入参数：光源代码，如 a、c、d50、d65、f4等% 输出参数：光源的相对光谱功率分布，n×2,第一列是波长，第二列是数据%% Zhengyuanlin@163.comilluCode=lower(illuCode);if isempty(findstr(illuCode,'f')) % 如果光源代码中不包含f字母，在说明不是F系列光源 switch illuCode case {'A' ,'a'} RSPD=SPD_CIE_A; case {'C' ,'c'} RSPD=SPD_CIE_C; case {'D50','50','d50',50} RSPD = SPD_CIE_D50; case {'D55','55','d55',55} RSPD=SPD_CIE_D55; case {'D65','65','d65',65} RSPD=SPD_CIE_D65; case {'D75','75','d75',75} RSPD=SPD_CIE_D75; otherwise % 不存在的光源，或代码没写对 RSPD=0; msgbox('没有此光源!','出错','error'); return endelse % 否则就是F系列光源 [a,len]=size(illuCode); illuCode=illuCode(2:len); illuCode=str2num(illuCode); if isempty(illuCode) RSPD=0; msgbox('没有此光源!','出错','error'); return end data=SPD_Fser; RSPD=[data(:,1),data(:,illuCode+1)];end
SPD_CIE_D50.m 文件如下：
function data=SPD_CIE_D50()% D50光源的光谱相对能量分布data=[3000.023051.033102.053154.913207.7832511.2633014.7533516.3534017.9534519.4835021.0135522.4836023.9436525.4537016.9637525.7238024.4938527.1839029.8739539.5940049.3140552.9141056.5141558.2742060.0342558.9343057.8243566.3244074.8244581.0445087.2545588.9346090.6146590.9947091.3747593.2448095.1148593.5449091.9649593.8450095.7250596.1751096.6151596.8752097.1352599.61530102.10535101.43540100.75545101.54550102.32555101.16560100.0056598.8757097.7457598.3358098.9258596.2159093.5059595.5960097.6960598.4861099.2761599.1662099.0462597.3863095.7263597.2964098.8664597.2665095.6765596.9366098.19665100.60670103.00675101.0768099.1368593.2669087.3869589.4970091.6070592.2571092.8971584.8772076.8572581.6873086.5173589.5574092.5874585.4075078.2375567.9676057.6976570.3177082.9277580.6078078.2778578.9179079.5579576.4880073.4080568.6681063.9281567.3582070.7882572.6183074.44];
其它的D65、D75、C、A等照明体，可以参照SPD_CIE_D50.m文件
CIE1931Std_XYZ.m是1931标准观察者，如下
function data= CIE1931Std_XYZ()% CIE 1931 XYZ 系统的数据，% 第一列是波长% 第二列是X刺激值% 第三列是Y刺激值% 第四列是Z刺激值%data=[3600.00012993.92E-060.00060613610.00014584.39E-060.00068093620.00016384.93E-060.00076513630.0001845.53E-060.000863640.00020676.21E-060.00096663650.00023216.97E-060.0010863660.00026077.81E-060.00122063670.00029318.77E-060.00137273680.00032949.84E-060.00154363690.00036991.10E-050.00173433700.00041491.24E-050.0019463710.00046421.39E-050.00217783720.0005191.56E-050.00243583730.00058191.74E-050.0027323740.00065521.96E-050.00307813750.00074162.20E-050.0034863760.0008452.48E-050.00397523770.00096452.80E-050.00454093780.00109493.15E-050.00515833790.00123123.52E-050.00580293800.0013680.0000390.006453810.00150214.28E-050.00708323820.00164234.69E-050.00774553830.00180245.16E-050.00850123840.00199585.72E-050.00941453850.0022360.0000640.010553860.00253547.23E-050.01196583870.00289268.22E-050.01365593880.00330089.35E-050.01558813890.00375320.00010610.01773023900.0042430.000120.020053910.00476240.0001350.02251143920.005330.00015150.02520293930.00597870.00017020.02827973940.00674110.00019180.0318973950.007650.0002170.036213960.00875140.00024690.04143773970.01002890.00028120.04750373980.01142170.00031850.05411993990.0128690.00035730.0609984000.014310.0003960.067854010.01570440.00043370.07448634020.01714740.0004730.08136164030.01878120.00051790.08915364040.0207480.00057220.09854054050.023190.000640.11024060.02620740.00072460.12461334070.02978250.00082550.14170174080.03388090.00094120.16130354090.03846820.00106990.18325684100.043510.001210.20744110.04899560.00136210.23369214120.05502260.00153080.26261144130.06171880.00172040.29477464140.0692120.00193530.33079854150.077630.002180.37134160.08695810.00245480.41620914170.09717670.0027640.46546424180.10840630.00311780.51969484190.12076720.00352640.57953034200.134380.0040.64564210.14935820.00454620.71848384220.16539570.00515930.79671334230.18198310.00582930.87784594240.1986110.00654620.9594394250.214770.00731.03905014260.23018680.00808651.11536734270.24487970.00890871.18849714280.25877730.00976771.25812334290.27180790.01066441.32392964300.28390.01161.38564310.29494380.01257321.44263524320.30489650.01358271.49480354330.31378730.01462971.54219034340.32164540.01571511.58488074350.32850.016841.622964360.33435130.01800741.65640484370.33921010.01921451.68529594380.34312130.02045391.70987454390.34612960.02171821.73038214400.348280.0231.747064410.34959990.02429461.76004464420.35014740.02561021.76962334430.3500130.02695861.77626374440.3492870.02835131.78043344450.348060.02981.78264460.34637330.03131081.78296824470.34426240.03288371.78169984480.34180880.03452111.77919824490.33909410.03622571.77586714500.33620.0381.772114510.33319770.03984671.76825894520.33004110.0417681.7640394530.32663570.0437661.75894384540.32288680.04584271.75246634550.31870.0481.74414560.31402510.05024371.73355954570.3088840.0525731.72085814580.30329040.05498061.70593694590.29725790.05745871.68873724600.29080.061.66924610.28397010.0626021.64752874620.27672140.06527751.62341274630.26891780.06804211.59602234640.26042270.07091111.5645284650.25110.07391.52814660.24084750.0770161.48611144670.22985120.08026641.43952154680.21840720.08366681.38987994690.20681150.08723281.33873624700.195360.090981.287644710.18421360.09491761.23742234720.17332730.09904581.18782434730.16268810.10336741.13876114740.15228330.10788461.0901484750.14210.11261.04194760.13217860.1175320.99419764770.12256960.12267440.94734734780.11327520.12799280.90145314790.10429790.13345280.85661934800.095640.139020.81295014810.08729960.14467640.77051734820.0793080.15046930.72944484830.07171780.15646190.68991364840.0645810.16271770.65210494850.057950.16930.61624860.05186210.17624310.58232864870.04628150.18355810.55041624880.04115090.19127350.52033764890.03641280.1994180.49196734900.032010.208020.465184910.02791720.21711990.43992464920.02414440.22673450.41618364930.0206870.23685710.39388224940.01754040.24748120.37294594950.01470.25860.35334960.01216180.27018490.33485784970.009920.28229390.31755214980.00796720.29505050.30133754990.00629630.3085780.28616865000.00490.3230.2725010.00377720.33840210.25881715020.00294530.35468580.24648385030.00242490.37169860.23477185040.00223630.38928750.22345335050.00240.40730.21235060.00292550.42562990.20116925070.00383660.44430960.19011965080.00517480.46339440.17922545090.00698210.48293950.16856085100.00930.5030.15825110.01214950.52356930.14813835120.01553590.5445120.13837585130.01947750.565690.12899425140.02399280.58696530.12007515150.02910.60820.11175160.03481490.62934560.10390485170.04112020.65030680.09666755180.0479850.67087520.08998275190.05537860.69084240.08384535200.063270.710.078255210.0716350.72818520.0732095220.08046220.74546360.06867825230.089740.76196940.06456785240.09945650.77783680.06078845250.10960.79320.057255260.12016740.80811040.05390445270.13111450.82249620.05074665280.14236790.83630680.04775285290.15385420.84949160.04489865300.16550.8620.042165310.17725710.87381080.03950735320.189140.88496240.03693565330.20116940.89549360.03445845340.21336580.90544320.03208875350.22574990.91485010.029845360.23832090.92373480.02771185370.25106680.93209240.02569445380.26399220.93992260.02378725390.27710170.94722520.02198935400.29040.9540.02035410.30389120.96025610.01871815420.31757260.96600740.01724045430.33143840.97126060.01586365440.34548280.97602250.01458465450.35970.98030.01345460.37408390.98409240.01230725470.38863960.98741820.01130195480.40337840.99031280.01037795490.41831150.99281160.00952935500.43344990.99495010.008755510.44879530.99671080.00803525520.4643360.99809830.00738165530.4800640.9991120.00678545540.49597130.99974820.00624285550.512050110.005755560.52829590.99985670.00530365570.54469160.99930460.00489985580.56120940.99832550.00453425590.57782150.99689870.00420245600.59450.9950.00395610.61122090.99260050.00362325620.62797580.98974260.00337065630.64476020.98644440.00314145640.66156970.98272410.00293485650.67840.97860.002755660.69523920.97408370.00258525670.71205860.96917120.00243865680.72882840.96385680.00230945690.74551880.95813490.00219685700.76210.9520.00215710.77854320.94545040.00201775720.79482560.93849920.00194825730.81092640.93116280.00188985740.82682480.92345760.00184095750.84250.91540.00185760.85793250.90700640.00176635770.87308160.89827720.00173785780.88789440.88920480.00171125790.90231810.87978160.00168315800.91630.870.001655810.92979950.85986130.00161015820.94279840.8493920.00156445830.95527760.8386220.00151365840.96721790.82758130.00145855850.97860.81630.00145860.98938560.80479470.00133675870.99954880.7930820.001275881.00908920.7811920.0012055891.01800640.76915470.00114675901.02630.7570.00115911.03398270.74475410.00106885921.0409860.73242240.00104945931.0471880.72000360.00103565941.05246670.70749650.00102125951.05670.69490.0015961.05979440.68221920.00096865971.06179920.66947160.00092995981.06280680.65667440.00088695991.06290960.64384480.00084266001.06220.6310.00086011.06073520.61815550.0007616021.05844360.60531440.00072376031.05522440.59247560.00068596041.05097680.57963790.00064546051.04560.56680.00066061.03903690.55396110.00054796071.03136080.54113720.00049166081.02266620.52835280.00043546091.01304770.51563230.00038356101.00260.5030.000346110.99136750.49046880.00030736120.97933140.47803040.00028326130.96649160.46567760.00026546140.95284790.45340320.00025186150.93840.44120.000246160.9231940.429080.00022956170.9072440.4170360.00022066180.8905020.4050320.0002126190.872920.3930320.00020226200.85444990.3810.000196210.8350840.36891840.00017426220.8149460.35682720.00015566230.7941860.34477680.0001366240.7729540.33281760.00011696250.75140.3210.00016260.72958360.30933818.61E-056270.70758880.29785040.00007466280.68560220.28659360.0000656290.66381040.27562455.69E-056300.64240.2655.00E-056310.62151490.25476324.42E-056320.60111380.24488963.95E-056330.58110520.23533443.57E-056340.56139770.22605283.26E-056350.54190.2170.000036360.52259950.20816162.77E-056370.50354640.19954882.56E-056380.48474360.19115522.36E-056390.46619390.18297442.18E-056400.44790.1750.000026410.42986130.16722351.81E-056420.4120980.15964640.00001626430.3946440.15227760.00001426440.37753330.14512591.21E-056450.36080.13820.000016460.34445630.13150037.73E-066470.32851680.12502480.00000546480.31301920.11877920.00000326490.29800110.11276911.33E-066500.28350.10706510.26954480.101476206520.25611840.096188606530.24318960.09112306540.23072720.086264906550.21870.081606560.20709710.077120606570.19592320.072825506580.18517080.068710106590.17483230.064769806600.16490.06106610.15536670.057396206620.146230.05395506630.137490.050673806640.12914670.047549706650.12120.0445806660.11363970.041758706670.1064650.03908506680.09969040.036563806690.09333060.034200506700.08740.03206710.0819010.029962606720.07680430.028076606730.07207710.026329406740.06768660.024708106750.06360.023206760.05980690.021800806770.05628220.020501106780.0529710.019281106790.04981860.018120706800.046770.01706810.04378410.015903806820.04087540.014837206830.03807260.013810706840.03540460.012834806850.03290.0119206860.03056420.011068306870.02838060.010273406880.02634480.009533306890.02445280.008846206900.02270.0082106910.02108430.007623806920.01959990.007085406930.01823730.006591506940.01698720.006138506950.015840.00572306960.01479060.005343106970.01383130.004995806980.01294870.004676406990.01212920.004380107000.01135920.00410207010.01062940.003838507020.00993880.003589107030.00928840.003354207040.00867890.003134107050.00811090.00292907060.00758240.002738107070.00708870.002559907080.00662730.002393207090.00619540.002237307100.00579030.00209107110.00540980.001953607120.00505260.001824607130.00471750.001703607140.00440350.001590207150.00410950.00148407160.00383390.001384507170.00357570.001291307180.00333430.001204107190.00310910.001122707200.00289930.00104707210.00270430.000976607220.0025230.000911107230.00235420.000850107240.00219660.000793207250.00204920.0007407260.0019110.000690107270.00178140.000643307280.00166010.000599507290.00154650.000558507300.001440.0005207310.001340.000483907320.00124630.000450107330.00115850.000418307340.00107640.000388707350.00099990.000361107360.00092870.000335407370.00086240.000311407380.00080080.000289207390.00074340.000268507400.00069010.000249207410.00064050.000231307420.00059450.000214707430.00055190.000199307440.00051240.00018507450.0004760.000171907460.00044250.000159807470.00041150.000148607480.0003830.000138307490.00035660.000128807500.00033230.0001207510.00030980.000111907520.00028890.000104307530.00026959.73E-0507540.00025169.09E-0507550.00023480.000084807560.00021927.92E-0507570.00020457.39E-0507580.00019086.89E-0507590.00017816.43E-0507600.00016620.0000607610.0001555.60E-0507620.00014465.22E-0507630.00013494.87E-0507640.00012594.55E-0507650.00011740.000042407660.00010963.96E-0507670.00010223.69E-0507689.54E-053.45E-0507698.90E-053.22E-0507708.31E-050.0000307717.75E-052.80E-0507727.23E-052.61E-0507736.75E-052.44E-0507746.29E-052.27E-0507755.87E-050.000021207765.48E-051.98E-0507775.11E-051.85E-0507784.77E-051.72E-0507794.45E-051.61E-0507804.15E-051.50E-0507813.87E-051.40E-0507823.61E-051.31E-0507833.37E-051.22E-0507843.15E-051.14E-0507852.94E-050.000010607862.74E-059.89E-0607872.55E-059.22E-0607882.38E-058.59E-0607892.22E-058.01E-0607902.07E-057.47E-0607911.93E-056.96E-0607921.80E-056.49E-0607931.68E-056.05E-0607941.56E-055.64E-0607951.46E-055.26E-0607961.36E-054.90E-0607971.27E-054.57E-0607981.18E-054.26E-0607991.10E-053.97E-0608001.03E-053.70E-0608019.56E-063.45E-0608028.91E-063.22E-0608038.31E-063.00E-0608047.75E-062.80E-0608057.22E-062.61E-0608066.73E-062.43E-0608076.28E-062.27E-0608085.85E-062.11E-0608095.46E-061.97E-0608105.09E-061.84E-0608114.74E-061.71E-0608124.42E-061.60E-0608134.12E-061.49E-0608143.84E-061.39E-0608153.58E-061.29E-0608163.34E-061.21E-0608173.11E-061.12E-0608182.90E-061.05E-0608192.71E-069.77E-0708202.52E-069.11E-0708212.35E-068.49E-0708222.19E-067.92E-0708232.04E-067.38E-0708241.91E-066.88E-0708251.78E-066.42E-0708261.66E-065.98E-0708271.54E-065.58E-0708281.44E-065.20E-0708291.34E-064.85E-0708301.25E-064.52E-070];
CIE1964Std.m也是参照CIE1931Std_XYZ.m即可
