I am working with cells produced by Comet Assays. Is there a way to isolate only the tail of the image? I would like to get the center of gravity of the tail, olive tail moment, etc. The closest I can get is removing the head region but what’s left isn’t only the tail (I did this by creating a tertiary object). I would like the tail region to be the part of the image to the right of the edge of the head.