Lux study: Contribution of a three-dimensional, high dynamic range, ultra-high-definition heads-up visualization system to a significant delivered light intensity decrease during different types of ocular surgeries

2021 ◽  
Author(s):  
L. Vélasque ◽  
N. Arbousoff ◽  
F. Rigaudier ◽  
M. Dominguez ◽  
E. Fourmaux ◽  
...  
Keyword(s):  
Light Intensity ◽  
Dynamic Range ◽  
Three Dimensional ◽  
High Dynamic Range ◽  
High Definition ◽  
Visualization System ◽  
Intensity Decrease ◽  
Different Types ◽  
High Dynamic

scholarly journals Adaptive Binocular Fringe Dynamic Projection Method for High Dynamic Range Measurement

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 4023 ◽  
Author(s):  
Changzhi Yu ◽  
Fang Ji ◽  
Junpeng Xue ◽  
Yajun Wang
Keyword(s):  
Projection Method ◽  
Dynamic Range ◽  
Three Dimensional ◽  
High Dynamic Range ◽  
Fringe Projection ◽  
Range Measurement ◽  
Optimal Projection ◽  
Three Dimensional Measurement ◽  
High Dynamic ◽  
Adaptively Adjusting

Three-dimensional measurement with fringe projection sensor has been commonly researched. However, the measurement accuracy and efficiency of most fringe projection sensors are still seriously affected by image saturation and the non-linear effects of the projector. In order to solve the challenge, in conjunction with the advantages of stereo vision technology and fringe projection technology, an adaptive binocular fringe dynamic projection method is proposed. The proposed method can avoid image saturation by adaptively adjusting the projection intensity. Firstly, the flowchart of the proposed method is explained. Then, an adaptive optimal projection intensity method based on multi-threshold segmentation is introduced to adjust the projection illumination. Finally, the mapping relationship of binocular saturation point and projection point is established by binocular transformation and left camera–projector mapping. Experiments demonstrate that the proposed method can achieve higher accuracy for high dynamic range measurement.

scholarly journals Simultaneous Determination of Glycyrrhizin and 15 Flavonoids in Licorice and Blood by High Performance Liquid Chromatography with Ultraviolet Detector

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Yongqian Zhang ◽  
Jin Cao ◽  
Yingping Wang ◽  
Shengyuan Xiao
Keyword(s):  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Rat Plasma ◽  
Simple Method ◽  
Ultraviolet Detector ◽  
Different Types ◽  
High Dynamic

Licorice is the most frequently used herb in traditional Chinese medicine (TCM) with versatile functions. It is also a popular natural dietary supplement. While the dosages is very important for there are some side effects caused by licorice. The composition of licorice, its products should be well determined thereof. A simple method for simultaneous determining sixteen compounds in vary high dynamic range of content has been established. This method based on the detection at the characteristic ultraviolet spectra of different types of compounds in licorice. Glycyrrhizin and fifteen flavonoids were well measured. All of these compounds can be precisely quantified at their characteristic wavelengths. This method has been successfully applied to the analyses of different licorices, Sini Tang decoction, and rat plasma after oral administration of Sini Tang decoction. These compounds were found to be over 3000 times in content (from 0.01 μg/g to 34.5 μg/g) in some samples.

Будущее цифрового телевизионного вещания: 4К, 8К, HEVC, HDR, далее везде

2020 ◽  
Author(s):  
I.N. Krasnoselskiy ◽  
Yu.D. Shavdiya
Keyword(s):  
Dynamic Range ◽  
High Dynamic Range ◽  
Digital Tv ◽  
Frame Rate ◽  
Main Trend ◽  
Practical Implementation ◽  
High Definition ◽  
Digital Tv Broadcasting ◽  
High Dynamic ◽  
Tv Broadcasting

The analysis of normative and technical documents for the European broadcasting zone issued in 2019 was carried out. The main trend and development goal of the TV industry is the transition to Ultra High Definition image formats combined with High Dynamic Range, High Frame Rate and immersive sound. It is shown that the practical implementation of new digital TV broadcasting technologies is lagging behind their development and international standardization. Проведен анализ нормативно-технических документов для европейской зоны вещания, изданных в 2019 г. Основными тенденциями и целями развития отрасли является переход на форматы вещания изображений сверхвысокой четкости в сочетании с большим динамическим диапазоном, высокой частотой кадров и иммерсивным звуком. Показано, что внедрение в практику новых технологий цифрового ТВ-вещания происходит с отставанием от их разработки и международной стандартизации.

scholarly journals Measuring SPM Piezo Displacement Responses

1999 ◽  
Vol 7 (4) ◽  
pp. 24-26
Author(s):  
Heinz Sturm ◽  
Markus Heyde ◽  
Klaus Radernann
Keyword(s):  
Scanning Probe Microscopy ◽  
Dynamic Range ◽  
Three Dimensional ◽  
Laser Interferometry ◽  
High Dynamic Range ◽  
Calibration Procedure ◽  
Short Contribution ◽  
Tilted Surface ◽  
Versatile Tool ◽  
High Dynamic

Scanning Probe Microscopy (SPU) is a versatile tool for the investigations of surfaces. Additionally to the three-dimensional examination of surface topography, local mechanical or electrical properties can be measured1. In this work we present a short contribution on the performance and reliability of piezoelectric transducers in a SPM, which take care of the fine positioning of the tip relative to the sample. Some of the calibration procedures known in literature [cited in 2] are: laser interferometry, scanning a slightly tilted surface, a grid, a crystallographic or artificial step of a known height or by using a reference piezo. To measure slow and fast piezo response simultaneously, we use a non-contact calibration procedure with a high dynamic range (Angstrom to several hundred micrometers) and high frequency range (D.C. to 200 kHz(-3dB)).

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