scholarly journals Hyper-Spectral Imager in visible and near-infrared band for lunar compositional mapping

2005 ◽  
Vol 114 (6) ◽  
pp. 721-724 ◽  
Author(s):  
A. S. Kiran Kumar ◽  
A. Roy Chowdhury
Keyword(s):  
Near Infrared ◽  
Infrared Band ◽  
Hyper Spectral ◽  
Spectral Imager

Photometric Correction of Images of Visible and Near-Infrared Bands from Chandrayaan-1 Hyper-Spectral Imager (HySI)

2021 ◽  
Vol 126 (1) ◽  
Author(s):  
Subhadyouti Bose ◽  
Mili Ghosh Nee Lala ◽  
Akhouri Pramod Krishna
Keyword(s):  
Near Infrared ◽  
Hyper Spectral ◽  
Spectral Imager

scholarly journals Hyper Spectral Image Characteristics of Aronia Melanocarpa Leaves under Saline Alkali Stress

2020 ◽  
Keyword(s):  
Spectral Reflectance ◽  
Near Infrared ◽  
Spectral Information ◽  
Alkali Stress ◽  
Plant Leaves ◽  
Infrared Band ◽  
Spectral Image ◽  
Aronia Melanocarpa ◽  
Image Characteristics ◽  
Hyper Spectral

<p>Objective: To obtain the characteristics analysis results of aronia melanocarpa leaves under saline alkali stress state and improve yield and quality of aronia melanocarpa. Methods: Using hyper spectral imaging system to obtain hyper spectral images of aronia melanocarpa leaves under saline alkali stress. The clear hyper spectral image is obtained by the conversion of reflectance, spectral envelope removal, and spectral denoising, and final hyper spectral image is obtained by the normalization of a clearer hyper spectral image. Results: Spectral information of aronia melanocarpa leaves under slight saline alkali stress: in the visible band, leaf reflectance is lower than leaf nutrient rich stress condition; in the near infrared band, the nutrient rich leaves was significantly higher than that of stress leaves. Spectral information of leaves under moderate saline alkali stress: spectral reflectance of different lesion spots for a same leaf in 550-680nm band is: severe &gt; moderate &gt; slight &gt; normal, in the near infrared band is on the contrary; spectral reflectance for different lesion grades in 550-680 nm, severe lesion leaves have highest reflectance, and normal leaves have the lowest reflectance. Under severe saline alkali stress, the leaf spectral information is: there is no significant difference in leaf spectral reflectance between the attachment aphid and the damaged leaf, but the difference is obvious for normal leaves in the band of 450-500 nm, 560-680 nm and 750-900 nm. Comparative results analysis for the three of saline alkali stress degree is: the near infrared band of 560-680 nm and the visible band of 780-900 nm is the sensitive band for the diagnosis of three kinds of stress; slight saline alkali stress has the most significant differences at 550 nm, and 780-900 nm; severe saline alkali stress has at 680 nm and 780-900 nm. Conclusion: The proposed method can analyze hyper spectral image characteristics of aronia melanocarpa leaves under different saline alkali stress the condition of is a kind of plant leaves, which is an efficient method for the analysis of characteristics of plant leaves under saline alkali stress.</p>

Advances on space-based hyper spectral remote sensing for atmospheric CO2in near infrared band

2015 ◽  
Vol 8 (5) ◽  
pp. 725-735 ◽  
Author(s):  
毕研盟 BI Yan-meng ◽  
王　倩 WANG Qian ◽  
杨忠东 YANG Zhong-dong ◽  
谷松岩 GU Song-yan ◽  
吴荣华 WU Rong-hua ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Near Infrared ◽  
Infrared Band ◽  
Hyper Spectral

scholarly journals Kinetic Observations on the Near Infrared Band of Cytochrome c Oxidase

1965 ◽  
Vol 240 (6) ◽  
pp. 2694-2698 ◽  
Author(s):  
Quentin H. Gibson ◽  
Colin Greenwood
Keyword(s):  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Near Infrared ◽  
Infrared Band

scholarly journals The Equivalent Thermal Conductivity of the Micro/Nano Scaled Periodic Cubic Frame Silver and Its Thermal Radiation Mechanism Analysis

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4158
Author(s):  
Haiyan Yu ◽  
Haochun Zhang ◽  
Heming Wang ◽  
Dong Zhang
Keyword(s):  
Thermal Conductivity ◽  
Thermal Radiation ◽  
Cell Size ◽  
Near Infrared ◽  
High Porosity ◽  
Mechanism Analysis ◽  
Infrared Band ◽  
Spectral Radiation ◽  
Radiation Mechanism ◽  
Equivalent Thermal Conductivity

Currently, there are few studies on the influence of microscale thermal radiation on the equivalent thermal conductivity of microscale porous metal. Therefore, this paper calculated the equivalent thermal conductivity of high-porosity periodic cubic silver frame structures with cell size from 100 nm to 100 µm by using the microscale radiation method. Then, the media radiation characteristics, absorptivity, reflectivity and transmissivity were discussed to explain the phenomenon of the radiative thermal conductivity changes. Furthermore, combined with spectral radiation properties at the different cross-sections and wavelength, the radiative transmission mechanism inside high-porosity periodic cubic frame silver structures was obtained. The results showed that the smaller the cell size, the greater radiative contribution in total equivalent thermal conductivity. Periodic cubic silver frames fluctuate more in the visible band and have better thermal radiation modulation properties in the near infrared band, which is formed by the Surface Plasmon Polariton and Magnetic Polaritons resonance jointly. This work provides design guidance for the application of this kind of periodic microporous metal in the field of thermal utilization and management.

scholarly journals Detection of Waxed Chestnuts using Visible and Near-Infrared Hyper-spectral Imaging

2016 ◽  
Vol 22 (2) ◽  
pp. 267-277
Author(s):  
Baicheng Li ◽  
Baolu Hou ◽  
Yao Zhou ◽  
Mantong Zhao ◽  
Dawei Zhang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Spectral Imaging ◽  
Hyper Spectral ◽  
Hyper Spectral Imaging

scholarly journals Restoration method of sootiness mural images based on dark channel prior and Retinex by bilateral filter

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Ning Cao ◽  
Shuqiang Lyu ◽  
Miaole Hou ◽  
Wanfu Wang ◽  
Zhenhua Gao ◽  
...  
Keyword(s):  
Near Infrared ◽  
Environmental Changes ◽  
Color Image ◽  
Visual Quality ◽  
Bilateral Filter ◽  
Dark Channel Prior ◽  
Infrared Band ◽  
Dark Channel ◽  
Restoration Method ◽  
Pseudo Color

AbstractEnvironmental changes and human activities can cause serious degradation of murals, where sootiness is one of the most common problems of ancient Chinese indoor murals. In order to improve the visual quality of the murals, a restoration method is proposed for sootiness murals based on dark channel prior and Retinex by bilateral filter using hyperspectral imaging technology. First, radiometric correction and denoising through band clipping and minimum noise fraction rotation forward and inverse transform were applied to the hyperspectral data of the sootiness mural to produce its denoised reflectance image. Second, a near-infrared band was selected from the reflectance image and combined with the green and blue visible bands to produce a pseudo color image for the subsequent sootiness removal processing. The near-infrared band is selected because it is better penetrating the sootiness layer to a certain extent comparing to other bands. Third, the sootiness covered on the pseudo color image was preliminarily removed by using the method of dark channel prior and by adjusting the brightness of the image. Finally, the Retinex by bilateral filter was performed on the image to get the final restored image, where the sootiness was removed. The results show that the images restored by the proposed method are superior in variance, average gradient, information entropy and gray scale contrast comparing to the results from the traditional methods of homomorphic filtering and Gaussian stretching. The results also show the highest score in comprehensive evaluation of edges, hue and structure; thus, the method proposed can support more potential studies or sootiness removal in real mural paintings with more detailed information. The method proposed shows strong evidence that it can effectively reduce the influence of sootiness on the moral images with more details that can reveal the original appearance of the mural and improve its visual quality.

Sensing Characteristics of Near-Infrared Band Based on New Photonic Crystal Fiber

2021 ◽  
Vol 48 (7) ◽  
pp. 0706001
Author(s):  
张文 Zhang Wen ◽  
白冰冰 Bai Bingbing ◽  
张砚曾 Zhang Yanzeng ◽  
陈聪 Chen Cong ◽  
邵齐元 Shao Qiyuan ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Near Infrared ◽  
Infrared Band ◽  
Crystal Fiber ◽  
Sensing Characteristics

The long-term vicarious and cross calibration plan for Hyper-spectral Imager Suite (HISUI)

2011 ◽  
Author(s):  
Akihide Kamei ◽  
Kazuki Nakamura ◽  
Tetsushi Tachikawa ◽  
Hirokazu Yamamoto ◽  
Ryosuke Nakamura ◽  
...  
Keyword(s):  
Hyper Spectral ◽  
Cross Calibration ◽  
Spectral Imager
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