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On 23/05/2017 01:15 p.m., Ben Coman wrote:<br>
<blockquote
cite="mid:CAProBTkpJd_MmeJJcA3+WkNkqdWazTCY_HO5_wn2cjv5LwmUMw@mail.gmail.com"
type="cite">
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, May 23, 2017 at 11:47 PM,
Juan Vuletich <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:JuanVuletich@zoho.com" target="_blank">JuanVuletich@zoho.com</a>></span>
wrote:<br>
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0.8ex; border-left: 1px solid rgb(204, 204, 204);
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Hi Folks,<br>
<br>
Satellogic was featured today at Nature News! <a
moz-do-not-send="true"
href="http://www.nature.com/news/earth-observing-companies-push-for-more-advanced-science-satellites-1.22034"
rel="noreferrer" target="_blank">http://www.nature.com/news/ear<wbr>th-observing-companies-push-<wbr>for-more-advanced-science-<wbr>satellites-1.22034</a><br>
<br>
I helped design and build the hyperspectral cameras in our
satellites Fresco and Batata. And I wrote the geometric
and spectral processing software for that image. This is
not completely off topic, though: The geometric software
(image rectification and correction), the most complex
part of the processing, was written by me in Cuis
Smalltalk, and runs in a Cuis Smalltalk + OpenCL
application.<br>
<br>
Please share my joy today!<span class="gmail-HOEnZb"><font
color="#888888"><br>
<br>
-- <br>
Juan Vuletich<br>
<a moz-do-not-send="true"
href="http://www.cuis-smalltalk.org"
rel="noreferrer" target="_blank">www.cuis-smalltalk.org</a><br>
<a moz-do-not-send="true"
href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev"
rel="noreferrer" target="_blank">https://github.com/Cuis-Smallt<wbr>alk/Cuis-Smalltalk-Dev</a><br>
@JuanVuletich<br>
<br>
<br>
</font></span></blockquote>
</div>
<br class="gmail-Apple-interchange-newline">
Its great to hear of joy in work. It was interesting to read
"The company announced in January that it would give
researchers free access to its 30-metre-resolution
hyperspectral data. These span optical and near-infrared
wavelengths and can help track water pollution and oil spills,
and monitor the health of forests and crops." <br>
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</div>
</blockquote>
<br>
Yes. We hope to make a difference.<br>
<br>
<blockquote
cite="mid:CAProBTkpJd_MmeJJcA3+WkNkqdWazTCY_HO5_wn2cjv5LwmUMw@mail.gmail.com"
type="cite">
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<div>Is your geometric software useful dataset users? Or is it
just for preprocessing to prepare saleable data?</div>
<div>Is its available to end-users? Or is it secret sauce?</div>
<div><br>
</div>
<div>cheers -ben </div>
</div>
</blockquote>
<br>
The image rectification and geolocation is used to produce the
images most people can use. The idea is to go from pictures taken
from the point of view of the satellite at the moment they were
taken (each with a different perspective) and turn them into a
map-like (or Google Maps like) geometry. This is especially
important to be able to track the evolution of stuff at some point
on Earth: you need images from different points in time, and they
need to be able to "stack" them. You also need to know exactly where
each pixel is located (i.e. latitude and longitude). End users don't
need this software: the images we provide are already corrected.<br>
<br>
There are various ways to do this in the industry. We are using a
rather unusual approach and I have developed some novel techniques,
that lets us do this with far less computational cost that usual.
These is currently proprietary technology. I intend to be able to
publish them as part of a Ph.D. thesis on C.S. in a not too distant
future. I talked about all this at
<a class="moz-txt-link-freetext" href="https://www.youtube.com/watch?v=bgIwbx-eDcI&index=44&list=PLCGAAdUizzH027lLWKXh_44cGuEsay7-R">https://www.youtube.com/watch?v=bgIwbx-eDcI&index=44&list=PLCGAAdUizzH027lLWKXh_44cGuEsay7-R</a>
and
<a class="moz-txt-link-freetext" href="https://www.youtube.com/watch?v=fx9dgLW9m7w&t=8s&list=PLCGAAdUizzH06AkHg6_UxZ6QZBgz84yAc&index=30">https://www.youtube.com/watch?v=fx9dgLW9m7w&t=8s&list=PLCGAAdUizzH06AkHg6_UxZ6QZBgz84yAc&index=30</a>
.<br>
<br>
Cheers,<br>
<pre class="moz-signature" cols="72">--
Juan Vuletich
<a class="moz-txt-link-abbreviated" href="http://www.cuis-smalltalk.org">www.cuis-smalltalk.org</a>
<a class="moz-txt-link-freetext" href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev">https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev</a>
@JuanVuletich</pre>
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