<h5 dir="auto">System information (version)</h5>
<ul dir="auto">
<li>OpenCV =&gt; 4.2</li>
<li>Operating System / Platform =&gt; Fedora Rawhide</li>
<li>Compiler =&gt; GCC 10</li>
</ul>
<h5 dir="auto">Detailed description</h5>
<p dir="auto">opencv fails to build with vtk 9.0.  First issue is that VTK 9 no longer sets VTK_RENDERING_BACKEND.  This at least can worked around by passing that option to cmake.</p>
<p dir="auto">Testing builds here: <a href="https://copr.fedorainfracloud.org/coprs/orion/vtk9.0/builds/" rel="nofollow">https://copr.fedorainfracloud.org/coprs/orion/vtk9.0/builds/</a></p>
<h5 dir="auto">System information (version)</h5>
<ul dir="auto">
<li>OpenCV =&gt; 4.5</li>
</ul>
<h5 dir="auto">Detailed description</h5>
<p dir="auto">The documentation for color conversions does not explain what _FULL does, e.g. <a href="https://docs.opencv.org/4.5.0/d8/d01/group__imgproc__color__conversions.html#gga4e0972be5de079fed4e3a10e24ef5ef0ae0070d7e97f1e565cc0992d038e5498e" rel="nofollow">https://docs.opencv.org/4.5.0/d8/d01/group__imgproc__color__conversions.html#gga4e0972be5de079fed4e3a10e24ef5ef0ae0070d7e97f1e565cc0992d038e5498e</a><br>
I believe this should be explained for each color conversion as there are different interpretations on forums.</p>
<h5 dir="auto">Issue submission checklist</h5>
<ul dir="auto">
<li>[*] I report the issue, it's not a question</li>
<li>[*] I checked the problem with documentation, FAQ, open issues,<br>
answers.opencv.org, Stack Overflow, etc and have not found solution<br>
There are some places with answers like:<br>
<a href="https://stackoverflow.com/questions/34200353/why-isnt-inrange-function-detecting-blue-color-when-i-have-given-it-the-entire" rel="nofollow">https://stackoverflow.com/questions/34200353/why-isnt-inrange-function-detecting-blue-color-when-i-have-given-it-the-entire</a><br>
or<br>
<a href="https://stackoverflow.com/questions/21782420/difference-between-hsv-and-hsv-full-in-opencv" rel="nofollow">https://stackoverflow.com/questions/21782420/difference-between-hsv-and-hsv-full-in-opencv</a></li>
</ul>
<p dir="auto">but they actually give different answers (full gives H in [0,255] in one, [0,360] in the other).</p>