Speckle reducing oct using optical chopper
WebJul 2, 2024 · Optical methods are non-contact and can be used for remote measurements. Laser Doppler Vibrometers are commonly used for vibration measurement and damage detection (Ehrhardt et al., 2024; Siringoringo and Fujino, 2006; Srivastava and Baqersad, 2024; Tuononen, 2011; Warren et al., 2011); however, it is challenging to use them for … WebApr 13, 2024 · Visible light optical coherence tomography (vis-OCT) provides a unique tool for imaging both structure and oxygen metabolism in ophthalmology. ... Kopriva, F. Shi, and X. Chen, “ Enhanced low-rank + sparsity decomposition for speckle reduction in optical coherence tomography,” J. Biomed. Opt. 21, 076008 (2016). ... The optical properties of ...
Speckle reducing oct using optical chopper
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WebSpeckle noise exists inherently in the synthetic aperture radar (SAR) image. Its multiplicative property leads to lots of difficulties in SAR image processing. A novel guidance-aided triple-adaptive Frost filter is proposed in this paper, which has potential for real-time processing platforms. Firstly, a scale-adaptive sliding window sizing method is adopted to determine … WebJun 17, 2007 · Two novel speckle noise reduction algorithms based on interval type II fuzzy sets has been developed to improve the quality of the OCT images and a novel even-order dispersion cancellation interferometry via a linear, classical interferometer has …
WebDec 8, 2024 · Speckle noise is ubiquitous in the optical coherence tomography (OCT) image of the anterior segment, which greatly affects the image quality and destroys the relevant … WebJan 1, 2024 · To effectively reduce the speckle noise of OCT images, we propose an edge feature-guided HOSVD method, which consists of five coherent parts: blocks grouping, Eckar-Young-Mirsky theorem based core tensor thresholding, edge feature-guided core tensor shrinking, blocks aggregation, and adaptive backward projection.
WebSpeckle reduction is generally used before image segmentation and registration as a preprocessing step. Existing techniques of speckle reduction include averaging, resolution enhancement, and postprocessing approaches. WebDec 8, 2024 · Speckle noise is ubiquitous in the optical coherence tomography (OCT) image of the anterior segment, which greatly affects the image quality and destroys the relevant structural information. In order to reduce the influence of speckle noise in OCT images, a denoising algorithm based on a convolutional neural network is proposed in this paper.
WebDec 23, 2024 · In this paper we propose a novel speckle noise suppression technique which changes the spatial distribution of sample beam using a special optical chopper. Then a …
WebNov 1, 2011 · Signal-degrading speckle is one factor that can reduce the quality of optical coherence tomography images. We demonstrate the use of a hierarchical model-based motion estimation processing scheme based on an affine-motion model to reduce speckle in optical coherence tomography imaging, by image registration and the averaging of … essential gear for police officersWebApr 6, 2024 · Spectral-domain optical coherence tomography (SD-OCT) images inevitably suffer from multiplicative speckle noise caused by random interference. This study proposes an unsupervised domain adaptation approach for noise reduction by translating the SD-OCT to the corresponding high-quality enhanced depth imaging (EDI)-OCT. We … essential gear for road cyclingWebJournal Of The Optical Society Of America A-Optics Image Science And Vision, 2024, 38(7): 973-984. (SCIE, JCR Q3,中科院3区,影响因子IF= 2.104) [34] Huang Z, Tang C,Xu M, et al. Both speckle reduction and contrast enhancement for optical coherence tomography via sequential optimization in the logarithmic domain based on a refined Retinex ... finwizard technology services pvt. ltdWebNov 10, 2024 · Optical coherence tomography (OCT) is widely used in clinical diagnosis due to its non-invasive, real-time, and high-resolution characteristics. However, the inherent speckle nois essential gear for shore fishingWebMar 22, 2024 · The speckle noise from the OCT images can also be reduced by sparse and redundant representation of image along with K-SVD algorithm [ 15 ]. Discrete wavelet transform with Bayesian threshold is also used for speckle noise removal from OCT images [ 16 ]. Recently, a number of combinational techniques are also used to de-noising the … essential gear outfitters texasWebApr 21, 2024 · In this paper, we improve the cGAN model and apply it to our in-house OCT scanner (scanner B) for speckle noise suppression. The proposed model consists of two steps: 1) We train a Cycle-Consistent GAN (CycleGAN) to learn style transfer between two OCT image datasets collected by different scanners. essential gear for violinWebAug 1, 2024 · Two categories of methods were used to reduce noise, including hardware-based and image-processing-based methods. Hardware-based methods include optical chopper [7], angular compounding [8,9], spatial compounding [10,11], and frequency compounding [12], aiming to produce uncorrelated speckle patterns that can be … essential gear lighter