Fast iterative sectional image reconstruction in optical scanning holography
نویسنده
چکیده
Abstract: Inverse imaging is a versatile technique for sectional image reconstruction in optical scanning holography. However, the matrix computation involved in the iterative process imposes a significant constraint on the size of the images. In this work, we develop a fast iterative method that circumvents the problem by taking advantage of the structures in the matrices. Experimental results show that we can handle large-size images about 64 times the previous size with a comparable amount of computation. c © 2009 Optical Society of America OCIS codes: (090.1760) Computer holography; (180.6900) Three-dimensional microscopy; (100.3190) Inverse problems;
منابع مشابه
Solving inverse problems for optical scanning holography using an adaptively iterative shrinkage-thresholding algorithm.
Optical scanning holography (OSH) records a three-dimensional object into a two-dimensional hologram through two-dimensional optical scanning. The recovery of sectional images from the hologram, termed as an inverse problem, has been previously implemented by conventional methods as well as the use of l₂ norm. However, conventional methods require time consuming processing of section by section...
متن کاملBlind sectional image reconstruction for optical scanning holography.
Optical scanning holography is a powerful holographic recording technique in which only a single two-dimensional scan is needed to record three-dimensional information. As in standard digital holography, for the reconstruction of a sectional image, the resulting data must then be postprocessed to obtain sectional content. We propose a blind sectional image reconstruction technique to automate t...
متن کاملPhase Only Synthesis of Antenna Patterns Using Iterative Restoration Methods
In this work, the method of iterative Fourier transform phase reconstruction, conventionally used in holography and optical image reconstruction, is applied to phase only synthesis of antenna patterns. The method is applied to two types of pattern synthesis problems: "main lobe beam shaping" and "side-lobe-level reduction". The proposed method is most useful in the efficient employment of attai...
متن کاملEdge-preserving sectional image reconstruction in optical scanning holography.
Optical scanning holography (OSH) enables us to capture the three-dimensional information of an object, and a post-processing step known as sectional image reconstruction allows us to view its two-dimensional cross-section. Previous methods often produce reconstructed images that have blurry edges. In this paper, we argue that the hologram's two-dimensional Fourier transform maps into a semi-sp...
متن کاملFast System Matrix Calculation in CT Iterative Reconstruction
Introduction: Iterative reconstruction techniques provide better image quality and have the potential for reconstructions with lower imaging dose than classical methods in computed tomography (CT). However, the computational speed is major concern for these iterative techniques. The system matrix calculation during the forward- and back projection is one of the most time- cons...
متن کامل