Hello, is there any sensor which provide the requirement of both vision based navigation and night vision technique? Or the sensors needed to be integrated?
yes vision based navigation of early period of aviation had night landing aids like runway lights aligned in such a way that the pilot gets guidance for landing. also while flying low the pilot gets ideas of terrains due to ordinary lights glowing on the sides of roads and on tall buildings(colored Red).
For your sensors part of the question - there are definitely blended/fused solutions such as a FLIR overlay for a HUD/camera visualization. As for a sensor that includes both, I think the difference is mainly in the amount of signal amplification in an electro-optical sensor setup, e.g. the backup camera on cars will use some type of auto-gain to adjust in low light situations...
Dear Asma,
In the aviation context, Vision Based Navigation (VBN) techniques employ image flow and feature recognition to estimate aircraft navigation states (attitude angles and relative position) can be obtained employing either single camera VBN or stereo-vision (i.e., two cameras imaging the same scene).
Night Vision Imaging Systems (NVIS) include Night Vision Goggles (NVG) and NVIS sighting systems, which can be mounted on an external turret or in a pod. NVIS topically do not provide a navigation sate vector.
Kind regards,
Rob
A data fusion algorithm is required to optimally expoit NVIS and VBN. One difficulty is that NVIS does not provide depth information. The fusion with stero-vision VBN (providing such information) would therefore be a promising implementation.
Hello
yes for night vision navigation you will need IR or IIR camera. and another way is using flash at the designed altitude.