Is it possible to calibrate an image with the grid only filling a part of the image? If so, how? Note: I have attached as much information as I can. I am currently machining a fixture to allow me to image and provide an analysis image. Attached images have restricted information blacked out.
My image plane is not large enough to have the full calibration grid inside it -- only a few dots on a 20% scale fit. The calibration grid is the NI PDF that came with the software. The real space for the camera focal plane is circularly shaped with a 15mm diameter. Due to space constraints, this region cannot be made larger. I believe I fulfill all the requirements for an NI Vision suitable grid based on the documentation I found. The only difference I can find from the youtube videos is that my grid does not cover camera's entire FOV.
When attempting a calibration, some of the Point Distortion Overlay points are displayed off the grid. When I define a rotated rectangle ROI, the points are all on the grid, but the "corrected image" is not accurate.
I only need to correct the central region of the image (inscribe a circle within the camera field of view and that is the central region of interest). The ROI is constantly in the same location with relation to the camera. Unfortunately, the camera is at a slight angle due to space restrictions -- hence the need for a grid calibration. How can I calibrate this system?
