I'm at a bit of a loss as to how to determine the error in measurement in a project I'm working on. The project involves taking a picture of an object, and then using the image to determine the width of the object.
So, a sample image would be like the one below:
Things we know:
- Distance from the object (via a sensor)
- Field of view of camera (measured at 48.8 degrees)
So I came up with the following to calculate the width of the frame of view:
The example is based on the object taking up the entire field of view, but that doesn't have to be the case. The object could be smaller, say 1/2 of the frame of view; to find the width you would simply take half of the field of view.
Now my question is, how do you determine the measurement error?