I have an HDL-20D digital camera with 1000TVL horizontal resolution, S/N ratio 54dB and 2200k-pixel 2/3-inch 2x IT-CCD and these are the specifications:
How do I calculate PPI from these details?
Context: Trying to recreate the camera parameters for simulating images from the camera. I need focal length to set in the Camera object for Unity renderer. I have a Camera matrix (intrinsic matrix), obtained through Calibration using OpenCV. Camera matrix has focal length in pixel units. My plan is to calculate PPI from Camera specs, and then use that to figure out focal length in mm, and set that on the Unity renderer.