Results 31 to 40 of about 132 (101)

Calibration of an imaging hyperspectrometer

Computer Optics, 2017
We describe a precise calibration procedure for an Offner imaging hyperspectrometer. We analyze the influence of the calibration on the accuracy of the spectral distribution registration. We conduct a comparative analysis of the experimental data with the results of the precise measurements of spectral distributions made using a high-precision ...
V. Podlipnov, R. Skidanov
openaire   +1 more source

Hyperspectral Non-Imaging Measurements and Perceptron Neural Network for Pre-Harvesting Assessment of Damage Degree Caused by Septoria/Stagonospora Blotch Diseases of Wheat

Agronomy, 2023
The detection and identification of plant diseases is a fundamental task for sustainable crop production. Septoria tritici and Stagonospora nodorum blotch (STB and SNB) are two of the most common diseases of cereal crops that cause significant economic ...
Sofia V. Zhelezova, Elena V. Pakholkova, Vladislav E. Veller, Mikhail A. Voronov, Eugenia V. Stepanova, Alena D. Zhelezova, Anton V. Sonyushkin, Timur S. Zhuk, Alexey P. Glinushkin   +8 more
doaj   +1 more source

Study on multi-spectral inversion of temperature and soot concentration in flames

Zhongguo Jianchuan Yanjiu, 2019
[Objectives]In order to accurately understand the temperature inside the flame and the distribution of soot concentration,[Methods]the distribution of the two-dimensional temperature and the soot volume fraction inverted from the spectral intensity image
Zhang Qi, Si Mengting, Wang Dongxu, Wang Anzhen, Li Can, Wang Zhen, Luo Zixue, Lou Chun, Cheng Qiang   +8 more
doaj   +1 more source

Simulation model of a multichannel Offner hyperspectrometer

Computer Optics, 2015
We study an advanced airborne hyperspectral system based on the Offner scheme for Earth remote sensing that has the advantages of compact size and high spatial and spectral resolution. An algorithm that enables choosing the most effective design parameters is developed. A schematic design and a simulation model of the multichannel hyperspectrometer are
A. Golovin, A. Demin
openaire   +1 more source

Simulation of hyperspectrometer on spectral linear variable filters

Computer Optics, 2014
Article is devoted to simulation of hyperspectrometer based on the use of linear variable filters. We regarded possibilities of recovery of spectral pixels of images based on the solution of the integral equation. The paper presents estimates of the size of the scattering spots depending on the parameters of the spectral filter.
N. Kazanskiy, S. Kharitonov, S. Khonina, S. Volotovskiy, Yu. Strelkov   +4 more
openaire   +1 more source

A dual-range diffraction grating for imaging hyperspectrometer based on the Offner scheme

Journal of Physics: Conference Series, 2018
V A Blank, V V Podlipnov, R V Skidanov
exaly   +2 more sources

Development of a Novel Embedded Relay Lens Microscopic Hyperspectral Imaging System for Cancer Diagnosis: Use of the Mice with Oral Cancer to Be the Example

International Journal of Spectroscopy, Volume 2012, Issue 1, 2012., 2012
This paper develops a novel embedded relay lens microscopic hyperspectral imaging system (ERL‐MHSI) with high spectral resolution (nominal spectral resolution of 2.8 nm) and spatial resolution (30 μm × 10 μm) for cancer diagnosis. The ERL‐MHSI system has transmittance and fluorescence mode.
Yao-Fang Hsieh, Mang Ou-Yang, Jeng-Ren Duann, Jin-Chern Chiou, Nai-Wen Chang, Chia-Ing Jan, Ming-Hsui Tsai, Shuen-De Wu, Yung-Jiun Lin, Cheng-Chung Lee, Mohammed A. Gondal   +10 more
wiley   +1 more source

Comparative experimental validation of microwave hyperspectral atmospheric soundings in clear-sky conditions [PDF]

Atmospheric Measurement Techniques
Accurate observations of atmospheric temperature and water vapor profiles are essential for weather forecasting and climate change detection. Hyperspectral radiance measurements afford a useful means to retrieve these thermodynamic variable fields by ...
L. Liu, N. Bliankinshtein, Y. Huang, J. R. Gyakum, P. M. Gabriel, S. Xu, M. Wolde   +6 more
doaj   +1 more source

Inferring microalgae density and net ecosystem production on soft sediments using infrared imaging

Limnology and Oceanography: Methods, Volume 23, Issue 3, Page 176-190, March 2025.
Abstract Measuring microalgae density in soft‐sediment benthos has challenges for even the most sophisticated methods. If the goal is to assess the photosynthetic potential of epipelon, then microalgae should be sampled only at the surface of the benthos to the depth of light penetration.
Anthony R. Ives, Emily L. Adler, K. Riley Book, Jamieson C. Botsch, Árni Einarsson, Ian S. Hart, Colin H. Ives, Ian Jin, Amanda R. McCormick, Joseph S. Phillips   +9 more
wiley   +1 more source

Modeling the performance of a spaceborne hyperspectrometer based on the offner scheme

Computer Optics, 2015
This article deals with modeling of a hyperspectrometer based on the Offner scheme within geometric optics. We show that at a certain set of parameters, the geometric aberrations are small compared with the size of a conventional CCD matrix sensor. An integral equation for the reconstruction of spectral components of the signal under the overlapping of
N. Kazanskiy, S. Kharitonov, L. Doskolovich, A. Pavelyev   +3 more
openaire   +1 more source