How to find direction in xrcpuimage?

I'm in the process of getting the distance from the xrcpuimage and converting it to coordinates. The center point could be converted to coordinates by putting the following directions.

Vector3 direction = camera.transform.forward; Vector3 coordi = camera.transform.position + direction.normalized * depthInMeters;

But I want to get the coordinates of other points, but it's impossible because I don't know the direction. How to find direction in xrcpuimage? Or please tell me any way to get the direction using the starting point(0, 0, 0) and distance.

Thanks in advance for your reply.