<p>Sites which have a computer vision tag might be interesting. The number of quesions asked there is an indicator for how relevant this might be. However, you should also consider that some sites (like StackOverflow) are much bigger than others (like datascience, which might be a good fit for you).</p>

<ul>
<li><a href="https://stackoverflow.com/questions/tagged/computer-vision">StackOverflow</a>: 5665 questions (I guess mainly about implementation; rather not about the algorithms themselves)</li>
<li><a href="https://dsp.stackexchange.com/questions/tagged/computer-vision">DSP</a>: 498 questions</li>
<li><a href="https://cs.stackexchange.com/questions/tagged/computer-vision">CS</a>: 114 questions</li>
<li><a href="https://stats.stackexchange.com/questions/tagged/computer-vision">Stats</a>: 104</li>
<li><a href="https://robotics.stackexchange.com/questions/tagged/computer-vision">Robotics</a>: 98 questions</li>
<li><a href="https://scicomp.stackexchange.com/questions/tagged/computer-vision">SciComp</a>: 31 questions</li>
<li><a href="https://datascience.stackexchange.com/questions/tagged/computer-vision">Datascience</a>: 14 questions</li>
</ul>
