Fusing multispectral images, Enhanced Vision (EV) has been proven helpful to improve pilot's Situation Awareness
(SA) under Degraded Vision Environment (DVE), such as low visibility or adverse observation conditions, which caused
by fog, dust, weak light, backlighting, etc. Numerous methods are applied to enhance and fuse optical and infrared (IR)
images for visual details to provide pilot with enough information as far as possible. However, most existing optical and
IR imaging devices, for their inherent defects, fail to acquire wide span of light and only generate Low Dynamic Range
images (LDR, Dynamic Range: range between the lightest and darkest areas), which causes the loss of useful details.
Normal display devices can't reveal HDR details as well.
The proposed paper introduces and expands High Dynamic Range (HDR) technologies to fuse optical and IR images,
which has rarely been involved in the study of HDR Imaging to our knowledge, for Enhanced Vision to better pilot's
Situation Awareness. Two major problems should be discussed. (1) The way to generate fused image with HDR
information under DVE. (2) The method to effectively display fused HDR image with normal LDR monitors. Aiming at
application environment, HDR fusion scheme is proposed and relevant methods are explored. The experimental results
prove that our scheme is effective and would be beneficial to enhancing pilot's Situation Awareness under DVE.