hi, I'm trying to figure out length and width of an object on a picture with pixels. Camera that takes the picture is always in the same position, only objects will change.... as example I take a picture from a US quarter from a distance of 10 inches.. to calibrate I calculate how many pixels the US quarter has (in my instance lets call it 150 pixels per 0.955 inches).. if I stack 25 quarters on top of each other will I still be able to get a somewhat accurate measurement or is this not possible?
Also would it work any better if I have an image from the top and one from the front?
Thanks for helping at this project!