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<div class="moz-cite-prefix">Hi Jaye,<br>
<br>
That is not how "compressed sensing" works.<br>
If you only receive 75% of the packets, your computer can still
reproduce a representation of the original image, but the picture
quality won't be as good as what you would see if your computer
had received 100% of the packets.<br>
This is a good intro to compressed sensing:<br>
<a moz-do-not-send="true"
href="http://www.pyrunner.com/weblog/2016/05/26/compressed-sensing-python/">http://www.pyrunner.com/weblog/2016/05/26/compressed-sensing-python/</a><br>
<br>
One possible mode of operation might be as a "digital fountain"
(search term: "fountain code") where the sending machine keeps
sending packets until the recipient(s) machines tell the sending
machine that they have successfully received enough packets and it
can now stop sending.<br>
It doesn't matter which recipients receive which packets, provided
that each receiver receives enough packets, which means that there
is no need to send the same packet twice (which wastes air-time
for those who have already received the duplicated packet).<br>
<br>
<br>
73 ZL2WRW<br>
Ross Whenmouth<br>
<br>
<br>
On 8/07/20 4:00 am, <a class="moz-txt-link-abbreviated" href="mailto:aprssig-request@lists.tapr.org">aprssig-request@lists.tapr.org</a> wrote:<br>
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<div class="headerdisplayname" style="display:inline;">Subject:
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Re: [aprssig] Packet Compressed Sensing Imaging (PCSI)</td>
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<div class="headerdisplayname" style="display:inline;">From:
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MJ Inabnit <a class="moz-txt-link-rfc2396E" href="mailto:ke6sls@arrl.net"><ke6sls@arrl.net></a></td>
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<div class="headerdisplayname" style="display:inline;">Date:
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7/07/20, 4:50 pm</td>
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<div class="headerdisplayname" style="display:inline;">To:
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<a class="moz-txt-link-abbreviated" href="mailto:aprssig@lists.tapr.org">aprssig@lists.tapr.org</a></td>
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<pre class="moz-quote-pre" wrap="">If we're dreaming, then lets add one more idea. FLamp (from the FLdigi
software) has the ability to copy part of a message, then request fills
of only what it didn't get. So perhaps this new mode can add that
element so if a user QSY's and only gets 75% of image, it would only ask
for fills of the 25% it didn't get.
Dreaming <span class="moz-smiley-s1" title=":)"><span>:)</span></span>
73
Jaye ke6sls
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