Journal ArticleDOI
Method for reduction of background artifacts of images in scanning holography with a Fresnel-zone-plate coded aperture.
Ping Sun,Jinghui Xie +1 more
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TLDR
A novel method termed as the composite hologram is proposed to reduce the artifacts in near-infrared scanning holography with a Fresnel zone plate (FZP) coded aperture and demonstrated improvements in the contrast and the signal-to-noise ratio (SNR) of the reconstructed images.Abstract:
Near-infrared scanning holography with a Fresnel zone plate (FZP) coded aperture has potential applications in imaging through turbid media. However, the nonnegative intensity-distribution function of the FZP coded aperture introduces the background artifacts into the reconstructed images, reducing the contrast and the signal-to-noise ratio (SNR) of the images. A novel method termed as the composite hologram is proposed to reduce the artifacts. The computer simulations showed that the contrast and the SNR of the reconstructed images had improvements of at least 50.2% and 5.58-dB, respectively, compared with the conventional method. The composite hologram of a metal ring with a 6.0-mm diameter made by a wire with a 0.4-mm diameter immersing in 1% intralipid solution was recorded, and the reconstruction was performed numerically. The experimental results demonstrated that the contrast and the SNR of the reconstructed image had improvements of at least 32.3% and 2.51-dB, respectively.read more
Citations
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Journal ArticleDOI
Digital in-line holographic microscopy.
Jorge Garcia-Sucerquia,W. Xu,Stephan K. Jericho,P. Klages,Manfred H. Jericho,H. Jürgen Kreuzer +5 more
TL;DR: The state of the art of digital in-line holographic microscopy with numerical reconstruction is reviewed and some technical issues, such as lateral and depth resolution, depth of field, twin image, four-dimensional tracking, and reconstruction algorithm are discussed.
Journal ArticleDOI
Digital In-line Holographic Microscopy
TL;DR: The state of the art of digital in-line holographic microscopy with numerical reconstruction is reviewed and some technical issues, such as lateral and depth resolution, depth of field, twin image, four-dimensional tracking, and reconstruction algorithm are discussed.
Patent
Coded aperture imaging system
TL;DR: In this article, the use of coded aperture imaging for imaging through a curved optical element is described as the image decoding can automatically remove any aberrations introduced by the curved element.
Journal ArticleDOI
Optical Scanning Holography - A Review of Recent Progress
TL;DR: Optical scanning holography (OSH) is a distinct digital holographic technique in that real-time holographic recording a three-dimensional (3-D) object can be acquired by using two-dimensional active optical heterodyne scanning as mentioned in this paper.
Patent
Processing methods for coded aperture imaging
TL;DR: In this paper, a coded aperture image processing method was proposed to reduce image blurring by dividing the processed image into image regions having a spatially invariant point spread function and solving an inverse problem for each image region.
References
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Book ChapterDOI
Optical Coherence Tomography
Eric A. Swanson,J. Izatt,M. Bee,David Huang,Charles P. Lin,Carmen A. Puliafito,Carmen A. Puliafito,James G. Fujimoto +7 more
TL;DR: Optical coherence tomography (OCT) has developed rapidly since its first realisation in medicine and is currently an emerging technology in the diagnosis of skin disease as mentioned in this paper, where OCT is an interferometric technique that detects reflected and backscattered light from tissue.
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Coded aperture imaging with uniformly redundant arrays
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TL;DR: Computer simulations show that the URA with significant shot and background noise is vastly superior to random array techniques without noise, and permits a detector which is smaller than its random array counterpart.
Journal ArticleDOI
Spectroscopy and Imaging with Diffusing Light
Arjun G. Yodh,Britton Chance +1 more
TL;DR: Visually opaque media are ubiquitous in nature as mentioned in this paper, and light is transported through these materials in a process similar to heat diffusion, where a vanishingly small number of photons travel straight through such substances.
Journal ArticleDOI
Optical reflectance and transmittance of tissues: principles and applications
TL;DR: In this article, a discussion of diagnostic and dosimetric optical measurements in medicine and biology is presented, including tissue optical properties, tissue boundary conditions, and invasive versus noninvasive measurements.