/usr/share/psychtoolbox-3/PsychRadiometric/PsychAnsiZ136MPE/AnsiZ136MPEComputeCc.m is in psychtoolbox-3-common 3.0.11.20140816.dfsg1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | function Cc = AnsiZ136MPEComputeCc(stimulusWavelengthNm)
% Cc = AnsiZ136MPEComputeCc(stimulusSizeDeg)
%
% ****************************************************************************
% IMPORTANT: Before using the AnsiZ136 routines, please see the notes on usage
% and responsibility in PsychAnsiZ136MPE/Contents.m (type "help PsychAnsiZ136MPE"
% at the Matlab prompt.
% ****************************************************************************
%
% Compute constant Cc, ANSI Z136.1-2007, Table 6, p. 76.
%
% This is only defined between 400 and 1400 nm.
%
% 2/20/13 dhb Wrote it.
%% Implement formula.
if (stimulusWavelengthNm < 1050)
error('Cc not defined for wavelengths less than 1050 nm');
elseif (stimulusWavelengthNm >= 1050 && stimulusWavelengthNm < 1150)
Cc = 1;
elseif (stimulusWavelengthNm >= 1150 && stimulusWavelengthNm < 1200)
Cc = 10^(18*(stimulusWavelengthNm/1000 - 1.150));
elseif (stimulusWavelengthNm >= 1200 && stimulusWavelengthNm < 1400)
Cc = 8;
else
error('Cc not defined for wavelengths greater than or equal to 1400 nm');
end
end
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