Thanks for the tips John1. I have been playing with how to change the light reflection from the USB camera by inserting the tip of my finger, the black end of a pen or something else which causes the light brightness to adjust.
I am also trying various filter materials.
I would really like to find a standalone piece of software that would work with either camera but no joy so far. I like the Dinolite SW features I saw in the videos for making lines, measuring, etc.
Someone smarter than me should invent the "The Jetson's Coin Hunting Dream Machine", it measures the radius, weighs the coin, immediately recognizes errors and varieties, takes the imagery, labels it and inserts a link to the right reference. Lol