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Reversible photodegradation is a process that has been observed in several dye molecules, but the underlying mechanisms are not still well understood. In this contribution, we characterize a series of anthraquinone dyes to determine how…

Chemical Physics · Physics 2016-04-27 Prabodh Dhakal , Mark G. Kuzyk

We have developed an automatic method for segmenting fluorescence lifetime (FLT) imaging microscopy (FLIM) images of cells inspired by a multi-resolution community detection (MCD) based network segmentation method. The image processing…

Medical Physics · Physics 2014-01-06 Dandan Hu , Pinaki Sarder , Peter Ronhovde , Sandra Orthaus , Samuel Achilefu , Zohar Nussinov

Graphene based sheets have stimulated great interest due to their superior mechanical, electrical and thermal properties. A general visualization method that allows quick observation of these single atomic layers would be highly desirable…

Materials Science · Physics 2009-12-15 Jaemyung Kim , Laura J. Cote , Franklin Kim , Jiaxing Huang

Fluorescence microscopy, widely used in the study of living cells, tissues, and organisms, often faces the challenge of photodamage. This is primarily caused by the interaction between light and biochemical components during the imaging…

Quantitative Methods · Quantitative Biology 2024-04-01 Estibaliz Gómez-de-Mariscal , Mario Del Rosario , Joanna W Pylvänäinen , Guillaume Jacquemet , Ricardo Henriques

Color can originate from wavelength-dependence in the absorption of pigments or the scattering of nanostructures. While synthetic colors are dominated by the former, vivid structural colors found in nature have inspired much research on the…

Soft Condensed Matter · Physics 2023-07-25 Tianqi Sai , Luis S. Froufe-Pérez , Frank Scheffold , Bodo D. Wilts , Eric R. Dufresne

Over the last decade, single-molecule optical microscopy has become the gold-standard approach to decipher complex molecular processes in cellular environments. [1-3] Single-molecule fluorescence microscopy has several advantages such as…

Biological Physics · Physics 2017-11-15 Edakkattuparambil Sidharth Shibu , Nadezda Varkentina , Laurent Cognet , Brahim Lounis

Cell painting is a popular technique for creating human-interpretable, high-contrast images of cell morphology. There are two major issues with cell paint: (1) it is labor-intensive and (2) it requires chemical fixation, making the study of…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Alexander Peysakhovich , William Berman , Joseph Rufo , Felix Wong , Maxwell Z. Wilson

Fiber photometry permits monitoring fluorescent indicators of neural activity in behaving animals. Optical fibers are typically used to excite and collect fluorescence from genetically-encoded calcium indicators expressed by a subset of…

Why do plants reflect in the green and have a 'red edge' in the red, and should extrasolar photosynthesis be the same? We provide: 1) a brief review of how photosynthesis works; 2) an overview of the diversity of photosynthetic organisms,…

Astrophysics · Physics 2009-11-13 Nancy Y. Kiang , Janet Siefert , Govindjee , Robert E. Blankenship

A reliable photon source is required for many aspects of quantum technology. Organic molecules are attractive for this application because they can have high quantum yield and can be photostable, even at room temperature. To generate a…

We propose a new method to image fluorescent objects through turbid media base on Airy beam scanning. This is achieved by using the non-diffractive nature of Airy beams, namely their ability to maintain their shape while penetrating through…

Optics · Physics 2019-05-01 Harel Nagar , Yael Roichman

Relevant information about physical properties of the surface of airless bodies such as porosity, particle size, or roughness can be inferred knowing the dependence of the brightness with illumination and observing geometry. Additionally,…

Instrumentation and Methods for Astrophysics · Physics 2021-08-30 J. L. Rizos , A. Asensio-Ramos , D. R. Golish , D. N. DellaGiustina , J. Licandro , J. de León , H. Campins , E. Tatsumi , M. Popescu

Two-photon fluorescence imaging has shown a promising application in biomedical imaging due to its outstanding advantages such as large penetration depth, low photo-damage, and photo-bleaching, etc. Among them, the two-photon fluorescent…

Chemical Physics · Physics 2024-11-27 Hongyang Wang , Xiaofei Wang , Yong Zhou , Jianzhong Fan

Super-resolution light microscopy overcomes the physical barriers due to light diffraction, allowing for the observation of otherwise indistinguishable subcellular entities. However, the specific acquisition conditions required by…

Lensless imaging enables exceptionally compact fluorescence sensors, advancing applications in \textit{in vivo} imaging and low-cost, point-of-care diagnostics. These sensors require a filter to block the excitation light while passing…

Image and Video Processing · Electrical Eng. & Systems 2026-02-20 Lukas Harris , Micah Roschelle , Jack Bartley , Mekhail Anwar

The adoption of neural network models in medical imaging has been constrained by strict privacy regulations, limited data availability, high acquisition costs, and demographic biases. Deep generative models offer a promising solution by…

Image and Video Processing · Electrical Eng. & Systems 2025-06-16 Zuzanna Skorniewska , Bartlomiej W. Papiez

Visualizing the details of different cellular structures is of great importance to elucidate cellular functions. However, it is challenging to obtain high quality images of different structures directly due to complex cellular environments.…

Image and Video Processing · Electrical Eng. & Systems 2019-10-01 Yi Liu , Hao Yuan , Zhengyang Wang , Shuiwang Ji

Accurate single cell detection in brightfield microscopy is crucial for biological research, yet data scarcity and annotation bottlenecks limit the progress of deep learning methods. We investigate the use of unconditional models to…

Computer Vision and Pattern Recognition · Computer Science 2025-12-02 Mario de Jesus da Graca , Jörg Dahlkemper , Peer Stelldinger

Recent technological advances in cutting-edge ultrasensitive fluorescence microscopy have allowed single-molecule imaging experiments in living cells across all three domains of life to become commonplace. Single-molecule live-cell data is…

Biomolecules · Quantitative Biology 2015-04-15 Mark Leake