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<div class="moz-cite-prefix">On 7/17/18 4:45 AM, Gabriel Diaz wrote:<br>
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<blockquote type="cite"
cite="mid:CAFvLWO19fCEMBH07JmgsFNUTczbw9b8r3Reo9VfoJgmKN6ar4g@mail.gmail.com">
<div class="gmail_default" style="font-size:small"><font
color="#000000"><i><span
style="background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;font-size:small;float:none;display:inline">3.
Are there multi-camera eye-tracker systems that we can
set-up from<span> </span></span><span
class="m_-3789227149921482451gmail-m_-4754232528054036665gmail-im"
style="background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;font-size:small">different
view points so that one or more can always have a clear
view<span> </span></span><span
style="background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;font-size:small;float:none;display:inline">of
the animal?</span></i><br>
</font></div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><span
style="color:rgb(0,0,0);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br>
</span></div>
<blockquote style="margin:0 0 0 40px;border:none;padding:0px">
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;font-size:small"><span
style="color:rgb(0,0,0);font-family:arial,sans-serif;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Not
that I've seen. I have discussed building something like
this before with colleagues. That would be a feat of
engineering and software development that requires a very
firm grasp of multiview geometry. That is a multi-year
project. </span></div>
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style="font-family:arial,helvetica,sans-serif;font-size:small"><br>
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<p>The SmartEye system uses multiple cameras. The have built-in
head and facial feature models that can often track a new subject
reasonably well, but for best performance the models need to be
tuned for each subject, which is a procedure that is done from
within their software. It might be possible to get this to work
with a macaque, but you would need to talk to their engineers.</p>
<p>I don't have much first-hand experience with this system, but
gaze accuracy is to a first approximation proportional to the
number of pixels devoted to the eye, and so any system where the
camera captures a large head box will necessarily suffer (unless
you have a camera with a LOT of pixels). So it depends on what
your accuracy requirements are.</p>
<p>good luck!</p>
<p>-Jeff</p>
<p><br>
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