Instead of writing the counting tool he could have used the Multi-Point Tool in ImageJ [1] [2]. I used it just this morning for counting some embryos I collected.
[1] https://www.youtube.com/watch?v=BhFNiPsVRoM
[2] https://fiji.sc/
[1] https://www.youtube.com/watch?v=BhFNiPsVRoM
[2] https://fiji.sc/
"Sentences that flashbang people not in biology"
> There are some clunky old Windows programs, niche scientific tools, and image analysis software that assumes you’re trying to count cells under a microscope...