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A new formulation of lateral imaging process of point-scanning optical coherence tomography (OCT) and a new differential contrast method designed by using this formulation are presented. The formulation is based on a mathematical sample…

Optical Coherence Tomography (OCT) is essential for diagnosing conditions such as glaucoma, diabetic retinopathy, and age-related macular degeneration. Accurate retinal layer segmentation enables quantitative biomarkers critical for…

Image and Video Processing · Electrical Eng. & Systems 2025-09-10 S M Asiful Islam Saky , Ugyen Tshering

This paper reports on advances in optical coherence tomography (OCT) for application in dermatology. Full-field OCT is a particular approach of OCT based on white-light interference microscopy. FF-OCT produces en face tomographic images by…

Medical Physics · Physics 2018-04-06 Olivier Levecq , Arthur Davis , Hicham Azimani , David Siret , Jean-Luc Perrot , Arnaud Dubois

Image fusion is a crucial technique in the field of computer vision, and its goal is to generate high-quality fused images and improve the performance of downstream tasks. However, existing fusion methods struggle to balance these two…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Hui Li , Congcong Bian , Zeyang Zhang , Xiaoning Song , Xi Li , Xiao-Jun Wu

In this paper, the problem of image super-resolution for Optical Coherence Tomography (OCT) has been addressed. Due to the motion artifacts, OCT imaging is usually done with a low sampling rate and the resulting images are often noisy and…

Image and Video Processing · Electrical Eng. & Systems 2023-06-22 Farnaz Sedighin , Andrzej Cichocki , Hossein Rabbani

Previous researches have demonstrated that the framework of dictionary learning with sparse coding, in which signals are decomposed as linear combinations of a few atoms of a learned dictionary, is well adept to reconstruction issues. This…

Computer Vision and Pattern Recognition · Computer Science 2012-03-06 Shu Kong , Donghui Wang

Anterior segment optical coherence tomography (AS-OCT) is a non-invasive imaging technique that is highly valuable for ophthalmic diagnosis. However, speckles in AS-OCT images can often degrade the image quality and affect clinical…

Graphics · Computer Science 2023-07-03 Li Sanqian , Higashita Risa , Fu Huazhu , Li Heng , Niu Jingxuan , Liu Jiang

We present a deep learning framework for volumetric speckle reduction in optical coherence tomography (OCT) based on a conditional generative adversarial network (cGAN) that leverages the volumetric nature of OCT data. In order to utilize…

Image and Video Processing · Electrical Eng. & Systems 2024-06-24 Bhaskara Rao Chintada , Sebastián Ruiz-Lopera , René Restrepo , Brett E. Bouma , Martin Villiger , Néstor Uribe-Patarroyo

Discriminative Correlation Filter (DCF) based methods have shown competitive performance on tracking benchmarks in recent years. Generally, DCF based trackers learn a rigid appearance model of the target. However, this reliance on a single…

Computer Vision and Pattern Recognition · Computer Science 2017-06-12 Joakim Johnander , Martin Danelljan , Fahad Shahbaz Khan , Michael Felsberg

Accurately segmenting fluid in 3D optical coherence tomography (OCT) images is critical for detecting eye diseases but remains challenging. Traditional autoencoder-based methods struggle with resolution loss and information recovery. While…

Image and Video Processing · Electrical Eng. & Systems 2025-01-06 Khondker Fariha Hossain , Sharif Amit Kamran , Alireza Tavakkoli , George Bebis , Sal Baker

In optical coherence tomography (OCT) volumes of retina, the sequential acquisition of the individual slices makes this modality prone to motion artifacts, misalignments between adjacent slices being the most noticeable. Any distortion in…

Machine Learning · Computer Science 2020-07-06 Yasmeen M. George , Suman Sedai , Bhavna J. Antony , Hiroshi Ishikawa , Gadi Wollstein , Joel S. Schuman , Rahil Garnavi

Diabetic retinopathy (DR) is a leading cause of vision loss, requiring early and accurate assessment to prevent irreversible damage. Spectral Domain Optical Coherence Tomography (SD-OCT) enables high-resolution retinal imaging, but…

Image and Video Processing · Electrical Eng. & Systems 2025-07-15 S. Chen , D. Ma , M. Raviselvan , S. Sundaramoorthy , K. Popuri , M. J. Ju , M. V. Sarunic , D. Ratra , M. F. Beg

Optical Coherence Tomography (OCT) imaging plays an important role in glaucoma diagnosis in clinical practice. Early detection and timely treatment can prevent glaucoma patients from permanent vision loss. However, only a dearth of…

Computer Vision and Pattern Recognition · Computer Science 2019-07-31 Xi Wang , Hao Chen , Luyang Luo , An-ran Ran , Poemen P. Chan , Clement C. Tham , Carol Y. Cheung , Pheng-Ann Heng

Optical Coherence Tomography (OCT) is an emerging technique in the field of biomedical imaging, with applications in ophthalmology, dermatology, coronary imaging etc. OCT images usually suffer from a granular pattern, called speckle noise,…

Computer Vision and Pattern Recognition · Computer Science 2016-05-25 Ahmadreza Baghaie , Roshan M. D'souza , Zeyun Yu

Optical coherence tomography (OCT) imaging is a well-known technology for visualizing retinal layers and helps ophthalmologists to detect possible diseases. Accurate and early diagnosis of common retinal diseases can prevent the patients…

Image and Video Processing · Electrical Eng. & Systems 2022-03-04 Mohammad Rahimzadeh , Mahmoud Reza Mohammadi

In this work we propose a ResNet-based universal method for speckle reduction in optical coherence tomography (OCT) images. The proposed model contains 3 main modules: Convolution-BN-ReLU, Branch and Residual module. Unlike traditional…

Computer Vision and Pattern Recognition · Computer Science 2019-03-25 Cai Ning , Shi Fei , Hu Dianlin , Chen Yang

In multi-center scenarios, One-Shot Federated Learning (OSFL) has attracted increasing attention due to its low communication overhead, requiring only a single round of transmission. However, existing generative model-based OSFL methods…

Computer Vision and Pattern Recognition · Computer Science 2025-08-12 Yufei Ma , Hanwen Zhang , Qiya Yang , Guibo Luo , Yuesheng Zhu

We demonstrate a three-dimensional (3D) optical diffraction tomographic technique with optimal frequency combination (OFC-ODT) for the 3D quantitative phase imaging of unlabeled specimens. Three sets of through-focus intensity images are…

Optics · Physics 2018-03-06 Jiaji Li , Qian Chen Jiasong Sun , Jialin Zhang , Junyi Ding , Chao Zuo

Optical Coherence Tomography (OCT) is pervasive in both the research and clinical practice of Ophthalmology. However, OCT images are strongly corrupted by noise, limiting their interpretation. Current OCT denoisers leverage assumptions on…

Image and Video Processing · Electrical Eng. & Systems 2020-08-19 Guillaume Gisbert , Neel Dey , Hiroshi Ishikawa , Joel Schuman , James Fishbaugh , Guido Gerig

Large-volume optical coherence tomography (OCT)-setups employ scanning mirrors and suffer from non-linear geometric distortion artifacts in which the degree of distortion is determined by the maximum angles over which the mirrors rotate. In…