Title :
Digital image construction from off-axis microwave hologram by angular spectrum backward propagation algorithm
Author :
Srongprapa, Anupong ; Vimonkiattikun, Thammasak
Author_Institution :
Dept. of Appl. Phys., King Mongkut´´s Inst. of Technol., Bangkok, Thailand
Abstract :
The angular spectrum backward propagation method has been proposed as another mean to numerically reconstruct an image from a microwave hologram, produced by the inteference between an off-axis reference plane wave and wave reflected from an object. The experimental verification has been carried out at a wavelength and hologram aperture size of 3.26 cm. and 148.48 cm. respectively. The quality of the image for object-hologram distance in the Fresnel zone is comparable to one obtained from the conventional Fresnel transform algorithm despite using a smaller processing aperture
Keywords :
image reconstruction; microwave holography; spectral analysis; 148.48 cm; 3.26 cm; Fresnel transform algorithm; Fresnel zone; angular spectrum backward propagation algorithm; digital image construction; hologram aperture size; image quality; image reconstruction; object-hologram distance; off-axis microwave hologram; off-axis reference plane wave; processing aperture; reflected wave; wavelength; Apertures; Diffraction; Digital images; Holography; Image reconstruction; Microwave propagation; Microwave theory and techniques; Signal processing; Structural beams; Transducers;
Conference_Titel :
Signal Processing and its Applications, Sixth International, Symposium on. 2001
Conference_Location :
Kuala Lumpur
Print_ISBN :
0-7803-6703-0
DOI :
10.1109/ISSPA.2001.950225
