Here in this thread, including everyone, of course.
My first impression is: the threads you started here so far will not get many/any responses from the sub-community of this forum, because they are merely external links without any easy-to-read description of the problem. It would help if whoever is posting these new threads takes the time to transform them into forum-friendly discussions, rather than simply link to existing content off-site. I know it is more work, but if you want experts to respond, you have to make it easy, tempting them into doing so.
Besides that concern, I think discussing Call4Help image analysis problems here is great: people will hear about how ImageJ, KNIME and other SciJava tools can be brought to bear on the problem, and the existing community here might also learn more about additional tools effective for solving these sorts of problems.