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Augmented reality display performance depends strongly on features of the human visual system. This is especially true for retinal scan glasses, which use laser beam scanning and transparent holographic optical combiners. Human-centered…

Optics · Physics 2024-12-03 Maximilian Rutz , Pia Neuberger , Simon Pick , Torsten Straßer

We report the possibility of using a simple neural network for effortless restoration of low-light images inspired by the retina model, which mimics the neurophysiological principles and dynamics of various types of optical neurons. The…

Image and Video Processing · Electrical Eng. & Systems 2022-10-06 Yurui Ming , Yuanyuan Liang

Adaptive optical correction is an efficient technique to obtain high-resolution images of the retinal surface. A main limitation of adaptive optical correction, however, is the small size of the corrected image. For medical purposes it is…

Optics · Physics 2015-03-27 Aglae Kellerer

Objective: Glaucoma is the second leading cause of blindness worldwide. Glaucomatous progression can be easily monitored by analyzing the degeneration of retinal ganglion cells (RGCs). Many researchers have screened glaucoma by measuring…

Image and Video Processing · Electrical Eng. & Systems 2020-11-22 Hina Raja , Taimur Hassan , Muhammad Usman Akram , Naoufel Werghi

This paper proposed a retinal image segmentation method based on conditional Generative Adversarial Network (cGAN) to segment optic disc. The proposed model consists of two successive networks: generator and discriminator. The generator…

Computer Vision and Pattern Recognition · Computer Science 2018-06-12 Vivek Kumar Singh , Hatem Rashwan , Farhan Akram , Nidhi Pandey , Md. Mostaf Kamal Sarker , Adel Saleh , Saddam Abdulwahab , Najlaa Maaroof , Santiago Romani , Domenec Puig

Functional MRI (fMRI) is a powerful technique that has allowed us to characterize visual cortex responses to stimuli, yet such experiments are by nature constructed based on a priori hypotheses, limited to the set of images presented to the…

Neurons and Cognition · Quantitative Biology 2021-05-18 Zijin Gu , Keith W. Jamison , Meenakshi Khosla , Emily J. Allen , Yihan Wu , Thomas Naselaris , Kendrick Kay , Mert R. Sabuncu , Amy Kuceyeski

Optical coherence tomography angiography (OCTA) is a new imaging modality to visualize retinal microvasculature and has been readily adopted in clinics. High-resolution OCT angiograms are important to qualitatively and quantitatively…

Image and Video Processing · Electrical Eng. & Systems 2023-05-11 Yuyan Ruan , Dawei Yang , Ziqi Tang , An Ran Ran , Carol Y. Cheung , Hao Chen

Being able to image the human retina in high resolution opens a new era in many important fields, such as pharmacological research for retinal diseases, researches in human cognition, nervous system, metabolism and blood stream, to name a…

Optics · Physics 2016-05-25 Guillaume Molodij , Erez N. Ribak , Marie Glanc , Guillaume Chenegros

Stimulation of specific neurons expressing opsins in a targeted region to manipulate brain function has proved to be a powerful tool in neuroscience. However, the use of visible light for optogenetic stimulation is invasive due to low…

We analyse the potential effects of lateral connectivity (amacrine cells and gap junctions) on motion anticipation in the retina. Our main result is that lateral connectivity can-under conditions analysed in the paper-trigger a wave of…

Quantitative Methods · Quantitative Biology 2020-09-07 Selma Souihel , Bruno Cessac

We report, to our knowledge, the first end-to-end application of Generative Adversarial Networks (GANs) towards the synthesis of Optical Coherence Tomography (OCT) images of the retina. Generative models have gained recent attention for the…

Computer Vision and Pattern Recognition · Computer Science 2019-02-19 Stephen G. Odaibo , M. D. , M. S. , M. S.

Experiments with networks of optogenetically altered neurons require stimulation with high spatio-temporal selectivity. Computer-assisted holography is an energy-efficient method for robust and reliable addressing of single neurons on the…

Optimization and Control · Mathematics 2013-02-04 Stephan C. Kramer , Johannes Hagemann , D. Russell Luke

Optical coherence tomography (OCT) is a commonly-used method of extracting high resolution retinal information. Moreover there is an increasing demand for the automated retinal layer segmentation which facilitates the retinal disease…

Image and Video Processing · Electrical Eng. & Systems 2020-09-30 Zeyu Fu , Yang Sun , Xiangyu Zhang , Scott Stainton , Shaun Barney , Jeffry Hogg , William Innes , Satnam Dlay

Non-invasive functional imaging of molecular and cellular processes of vision is expected to have immense impact on research and clinical diagnostics. Although suitable intrinsic optical signals (IOS) have been observed ex vivo and in…

Medical Physics · Physics 2017-02-08 Dierck Hillmann , Hendrik Spahr , Clara Pfäffle , Helge Sudkamp , Gesa Franke , Gereon Hüttmann

Computer-generated holographic (CGH) displays show great potential and are emerging as the next-generation displays for augmented and virtual reality, and automotive heads-up displays. One of the critical problems harming the wide adoption…

Human-Computer Interaction · Computer Science 2021-08-16 Praneeth Chakravarthula , Zhan Zhang , Okan Tursun , Piotr Didyk , Qi Sun , Henry Fuchs

Purpose: To remove retinal shadows from optical coherence tomography (OCT) images of the optic nerve head(ONH). Methods:2328 OCT images acquired through the center of the ONH using a Spectralis OCT machine for both eyes of 13 subjects were…

Typical learning-based light field reconstruction methods demand in constructing a large receptive field by deepening the network to capture correspondences between input views. In this paper, we propose a spatial-angular attention network…

Image and Video Processing · Electrical Eng. & Systems 2021-11-24 Gaochang Wu , Yingqian Wang , Yebin Liu , Lu Fang , Tianyou Chai

We introduce a non-invasive approach for optogenetic regulation in biological cells through highly scattering skull tissue using wavefront shaping. The wavefront of the incident light was systematically controlled using a spatial light…

Restoring images from low-light data is a challenging problem. Most existing deep-network based algorithms are designed to be trained with pairwise images. Due to the lack of real-world datasets, they usually perform poorly when generalized…

Image and Video Processing · Electrical Eng. & Systems 2020-12-25 Yangyang Qu , Chao liu , Yongsheng Ou

Identification and manipulation of different GABAergic interneuron classes in the behaving animal are important to understand their role in circuit dynamics and behavior. The combination of optogenetics and large-scale neuronal recordings…

Neurons and Cognition · Quantitative Biology 2023-11-20 Lisa Roux , Eran Stark , Lucas Sjulson , György Buzsáki