Thanks again all. I feel like I’m getting closer, but still struggling with a few things.
I like the idea of a light box and an egg shell tray. If I decide to pursue this further, I will buy a rectangular egg shell light panel like the one here, and place it over a light box https://www.homedepot.com/p/Plaskolite-4-ft-x-2-ft-Suspended-Egg-Crate-Light-Ceiling-Panel-1199233A/202025149
Anyways, where I am still having trouble is the measurements I am receiving still do not make sense. Below is my process:
Base photo is 321 berries on top of a plastic bag. I realize that my lighting and staging could be better, but that is not the issue at the moment:
After converting to 8 bit, then Threshold Li, I set the scale with a line along the ruler, then set that to 300 mm:
Then I set the circularity to 0.3 and the minimum size to 5 mm2, because some of the berries could be as small 3 mm in diameter.
Quick question: Should I be checking the box for “Pixel Units”?
Finally, these are the results:
Now, the number of measurements is close enough (279, compared to an actual of 321) for the time being, and can be refined with better lighting and staging. What does not make sense to me are the Major Axis and Feret’s Diameter. Assuming I set the scale correctly, all of these measurements should be well over 3-4 mm, if not upwards of 8-10 mm plus. However nearly all of these measurements are less than 1.
What am I doing wrong? Thanks again in advance.