<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-ligatures:standardcontextual;
mso-fareast-language:EN-US;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-GB" link="#0563C1" vlink="#954F72" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal" style="margin-bottom:8.0pt;line-height:105%"><span style="mso-ligatures:none;mso-fareast-language:EN-GB">We have just published a paper in Color Research & Application in which we define the LMS cone absorbance spectra, macular and lens
pigment optical densities and thus the LMS cone spectral sensitivities as continuous functions of wavelength from 360 to 850 nm (</span><span style="mso-ligatures:none">Stockman & Rider, 2023,
<i>Color Research and Application</i>). (The paper is open access and can be found
</span><span style="mso-ligatures:none;mso-fareast-language:EN-GB"><a href="https://doi.org/10.1002/col.22879"><span style="color:blue;mso-fareast-language:EN-US">here</span></a></span><span style="mso-ligatures:none">.) These continuous functions reproduce
the tabulated, discrete CIE2006 cone spectral sensitivities with negligible error, but also allow the easy generation of individual cone spectral sensitivities with different spectral shifts (due to polymorphic or hybrid photopigments) and with different macular
and lens optical densities and photopigment densities. Thus, cone spectral sensitivities can be generated for trichromats, anomalous trichromats (with selected LM hybrid photopigments), dichromats and monochromats that can cover the range of individual differences
likely to be found in the population. </span><span style="mso-ligatures:none;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt;line-height:105%"><span style="mso-ligatures:none;mso-fareast-language:EN-GB">To facilitate these calculations, we have written a program in Python that generates the linear or logarithmic L-, M- and S-cone spectral
sensitivities as a graphical output or as an Excel file. The program interface allows the selection of L- and M-cone spectral shifts (specified in nm or by hybrid photopigment type), macular and lens optical densities and photopigment optical densities. Standard
2° or 10° functions can also be chosen. <o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt;line-height:105%"><span style="mso-ligatures:none;mso-fareast-language:EN-GB">We have placed the software code and instructions on GitHub at:
<a href="https://github.com/CVRL-IoO/Individual-CMFs.git"><span style="color:blue">https://github.com/CVRL-IoO/Individual-CMFs.git</span></a><u><span style="color:blue">.</span></u> Our intention is to make the code available for others to improve and modify,
and to incorporate in their own software. Use at your own risk. There may be bugs. Please let us know when you find them!<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt;line-height:105%"><span style="mso-ligatures:none;mso-fareast-language:EN-GB">Andrew Stockman and Andy Rider</span><span style="mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:8.0pt;line-height:105%"><span style="mso-ligatures:none">DOI: 10.5281/zenodo.8266884<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US" style="font-size:10.0pt;mso-ligatures:none;mso-fareast-language:EN-GB">
<hr size="1" width="100%" align="center">
</span></div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;mso-ligatures:none;mso-fareast-language:EN-GB">Andrew Stockman<br>
</span><span lang="EN-US" style="mso-ligatures:none;mso-fareast-language:EN-GB"><a href="mailto:a.stockman@ucl.ac.uk"><span style="font-size:10.0pt;color:black">a.stockman@ucl.ac.uk</span></a></span><span lang="EN-US" style="font-size:12.0pt;mso-ligatures:none;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-ligatures:none;mso-fareast-language:EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;mso-ligatures:none;mso-fareast-language:EN-GB">Colour & Vision Research Labs database at
</span><span lang="EN-US" style="mso-ligatures:none;mso-fareast-language:EN-GB"><a href="http://www.cvrl.org/"><span style="font-size:10.0pt;color:black">http://www.cvrl.org</span></a><o:p></o:p></span></p>
<div class="MsoNormal" align="center" style="text-align:center"><span style="color:#1F497D;mso-ligatures:none;mso-fareast-language:EN-GB">
<hr size="1" width="100%" align="center">
</span></div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>