Proceedings ArticleDOI
Analysis And Processing Of Phase-Only Reconstruction In Acoustical Imaging
TLDR
This paper analyzes phase-only reconstruction, considers bit-rate reduction both in sampling and quantization, and develops the resolution enhancement algorithm associated with the phase- only technique.Abstract:
Data acquisition and image reconstruction in acoustical imaging often requires high bit rates and complicated calculations in order to achieve good quality images in reasonable time. Therefore reducing the bit rates and simplifying the reconstruction algorithms are of great importance in this technology. It is possible to produce high-quality images by using only the phase information of the detected signal. The phase-only technique constitute a way of performing high-quality imaging at lower bit rates. This paper analyzes phase-only reconstruction, considers bit-rate reduction both in sampling and quantization, and develops the resolution enhancement algorithm associated with the phase-only technique.read more
Citations
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Journal ArticleDOI
Formulation of the Generalized Backward-Projection Method for Acoustical Imaging
TL;DR: In this paper, the generalized backward-projection (GPR) method is proposed for acoustic image reconstruction. But the formulation of the GPR is different from ours in terms of objectives and structures, and it is not applicable to all linear imaging systems.
Book ChapterDOI
Performance Evaluation of Phase-Only Technique for High-Resolution Holographic Imaging
Hua Lee,Jen-Hui Chuang +1 more
TL;DR: Phase-only image reconstruction is a widely used technique in holography that utilizes only the phase information of the complex amplitude of the resultant wave-field for image formation.
Book ChapterDOI
Computation simplification for high-speed acoustical image reconstruction.
Hua Lee,Jen-Hui Chuang +1 more
TL;DR: This paper is able to reduce the computation complexity by replacing the exponential and trigonometric operators by real and symmetric weighting functions and will not only significantly enhance the potential for high-speed acoustical image reconstruction, but also simplify the filter structure for VLSI hardware implementation.
Book ChapterDOI
Acoustical Imaging: History, Applications, Principles and Limitations
Glen Wade,Hua Lee,Carl Schueler +2 more
TL;DR: There are many other applications for sonic images as discussed by the authors, such as oceanic search, seismic exploration, non-destructive evaluation, and microscopy, but the more detailed descriptions in this chapter will be restricted to systems employed for microscopy and diagnostic medicine.
References
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Journal ArticleDOI
The importance of phase in signals
Alan V. Oppenheim,Jae Lim +1 more
TL;DR: Specific conditions under which a sequence can be exactly reconstructed from phase are reviewed, both for one-dimensional and multi-dimensional sequences, and algorithms for both approximate and exact reconstruction of signals from phase information are presented.
Book ChapterDOI
The Relative Importance of Phase and Amplitude in Acoustical Holography
TL;DR: In this article, the phase-only hologram was used to detect the phase of the object wave rather than both the phase and the amplitude of the wave, which can reduce the amount of data to be acquired because only the phase needs to be measured and the full dynamic range of the recording equipment can be used over the entire hologram aperture.