<div dir="ltr"> You are correct, hat the comment is no longer correct and should be removed. There was a time when the elements were sorted by default. Now the elements can be retrieved in an ordered fashion using the select() methods and are only sorted on request.<div><br></div><div>-Linus</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Mar 12, 2019 at 4:18 PM Matt Brown via Kwiver-users <<a href="mailto:kwiver-users@public.kitware.com">kwiver-users@public.kitware.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>I notice that the documentation for <b>detected_object_set</b> says <a href="https://github.com/Kitware/kwiver/blob/master/vital/types/detected_object_set.h#L61" target="_blank">"detections are ordered on their basic confidence value."</a> I'm not quite sure what is meant by "basic confidence value" or the full implications for cases where a detection has a confidence for multiple classes.<br></div><div><br></div><div>An example where this becomes a problem is my current debugging of a non-maximum suppression filter, which tries to identify overlapping detections and only take the highest-confidence one. The current non-max filter assumes the detections in <b>detected_object_set</b> are sorted by confidence, and as it loops over the set, if there is bounding box overlap, the detection earlier in the set wins. The problem is, the <b>detected_object_set </b>will at most be sorted on one class's confidence, and I believe there are several examples already where other algorithms add or merge sets without enforcing that they remain sorted. In fact, the <a href="https://github.com/Kitware/kwiver/blob/master/vital/types/detected_object_set.cxx#L121" target="_blank">add function</a> for <b>detected_object_set</b> itself just appends to the end of the vector.</div><div><br></div><div>My suggestion is that we remove the specification that <b>detected_object_set</b> is sorted by confidence. This makes sense, at least nominally, since a set implies an unordered group (versus a list, tuple, vector, etc.). Otherwise, I think we'd need a way to ask <b>detected_object_set</b> if it is sorted on a particular class,</div><div><br></div><div>Best,</div><div>Matt<br></div></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><b style="color:rgb(136,136,136)">Linus Sherrill</b><div><div dir="ltr"><div dir="ltr"><div><font color="#888888">Facility Security Officer<br></font><font color="#888888">Kitware, Inc.<br>1712 Route 9, Suite 300<br>Clifton Park, NY 12065<br>E: <a href="mailto:linus.sherrill@kitware.com" style="color:rgb(17,85,204)" target="_blank">linus.sherrill@kitware.com</a><br>P: 518.881.4400</font></div><div><font color="#888888"><pre cols="72"><font face="arial, helvetica, sans-serif">The information transmitted is intended only for the person or entity to which
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