Methods and apparatuses of registering on a camera display separate fields
of view of a visible light camera module and an infrared camera module by
focusing the IR camera module. The fields of view can be displayed in
several display modes including 1) full screen visible, infrared and/or
blended, 2) picture-in-a-picture such as partial infrared image in a full
screen visible image, and 3) infrared color alarms in visible-light
images.