I would love to see a count of discreet selections in an image. My main motivation is biology research, where it is often vital to perform cell counts in an image.
It's incredibly easy to create a selection of luminescent cells on a plate via channels or the color range tool, and both methods account for variations in cell shape really well. But there's no way to see how many selections have been made. I really don't want to count to 30,000 by hand, even with the count tool!
Attached: A plate sample! 🙂 Would be great to have an "Add count" option that let me set min and max size or luminosity and then drop the result into the measurements log.