Proceedings Article | 1 May 2017
KEYWORDS: Target recognition, Holography, Phase shifting, Digital holography, Light emitting diodes, Image resolution, LIDAR, Light sources, Michelson interferometers, 3D image reconstruction, Holograms, Target detection, 3D acquisition, 3D image processing, Mirrors
In this study, we proposed the Incoherent Digital Holographic Imaging (IDHI) for recognition and phase information of
dedicated target. Although recent development of a number of target recognition techniques such as LIDAR, there have
limited success in target discrimination, in part due to low-resolution, low scanning speed, and computation power. In
the paper, the proposed system consists of the incoherent light source, such as LED, Michelson interferometer, and
digital CCD for acquisition of four phase shifting image. First of all, to compare with relative coherence, we used a
source as laser and LED, respectively. Through numerical reconstruction by using the four phase shifting method and
Fresnel diffraction method, we recovered the intensity and phase image of USAF resolution target apart from about 1.0m
distance. In this experiment, we show 1.2 times improvement in resolution compared to conventional imaging. Finally,
to confirm the recognition result of camouflaged targets with the same color from background, we carry out to test
holographic imaging in incoherent light. In this result, we showed the possibility of a target detection and recognition
that used three dimensional shape and size signatures, numerical distance from phase information of obtained
holographic image.
