Monochromatic Leds For Vision Improvement in Foggy Roads

2021 ◽  
pp. 108-113
Author(s):  
Shovakar Bhattacharjee ◽  
Arnab De ◽  
Arijit Saha ◽  
Saswati Mazumdar
Keyword(s):  
Adverse Effect ◽  
Visual System ◽  
Vision System ◽  
Monochromatic Light ◽  
Green Light ◽  
Monochromatic Radiation ◽  
Artificial Vision ◽  
Long Distance ◽  
Amber Light ◽  
Traffic Speed

In India, foggy weather creates poor visibility, and this leads to several accidents and slows down normal traffic speed, which may lead to adverse effect on the economy of the country. The probable solution is the use of monochromatic light with other artificial vision system to increase the visibility for the drivers in these foggy areas. There are various kinds of monochromatic lights available in the market. In this study, it has been tried to find out the best working monochromatic LEDs for this particular application. In this study, two types of monochromatic radiation were compared (amber light with 600 nm and green light with 545 nm) with and without the camera-display setup (artificial visual system) for finding out best working system in the foggy area for increasing the visibility. The experiment shows that amber light monochromatic radiation with 600 nm works better for identification of objects. The amber light can be used in front of a car to illuminate the front environment in the foggy weather and increase the visibility. It has been observed that green light monochromatic radiation with 545 nm works better for identification of the source from a very long distance. It has been proposed to install both of these lights with amber and green monochromatic radiation in vehicles to reduce accidents in foggy weather.

Symbolic Pointillism: Computer Art Motivated by Human Brain Structures

Leonardo ◽  
2005 ◽  
Vol 38 (4) ◽  
pp. 337-340 ◽  
Author(s):  
Norbert Krüger ◽  
Florentin Wörgötter
Keyword(s):  
Visual System ◽  
Human Brain ◽  
Human Visual System ◽  
Vision System ◽  
Visual Representations ◽  
Brain Structures ◽  
Human Vision ◽  
Artificial Vision ◽  
Computer Art ◽  
Functional Aspects

The authors introduce a new kind of computer art motivated by cortical structures in the human visual system. This type of computer art is related to the sub-group of the impressionist art movement called pointillism. However, while pointillism visualizes and makes use of processes that have been associated with the human eye, Symbolic Pointillism also makes cortical processes explicit. The visual representations underlying this art have been developed during a project that aims at the transfer of functional aspects of human vision to artificial systems. The authors have applied their findings in such an artificial vision system and in a sound/vision installation.

A Two-Channel Artificial Vision System for Motion Analysis

2003 ◽  
Vol 43 (9) ◽  
pp. 1271-1279
Author(s):  
Alexis Quesada-Arencibia ◽  
Roberto Moreno-Díaz ◽  
Miguel Aleman-Flores
Keyword(s):  
Motion Analysis ◽  
Vision System ◽  
Artificial Vision

scholarly journals Ripening Stages Control of Cherry Tomato Coated with Aloe Vera Gel using Artificial Vision System

2020 ◽  
Vol 17 (105) ◽  
pp. 135-149
Author(s):  
Ali Ganjloo ◽  
Mohsen Zandi ◽  
Mandana Bimakr ◽  
Samaneh Monajem ◽  
◽  
...  
Keyword(s):  
Vision System ◽  
Aloe Vera ◽  
Artificial Vision ◽  
Cherry Tomato ◽  
Ripening Stages ◽  
Aloe Vera Gel

Optical properties of laser sintered polyamide 12

2015 ◽  
Vol 21 (4) ◽  
pp. 443-448 ◽  
Author(s):  
Mengqi Yuan ◽  
David L. Bourell
Keyword(s):  
Optical Properties ◽  
Plate Thickness ◽  
Monochromatic Light ◽  
Green Light ◽  
Wavelength Dependence ◽  
Light Transmittance ◽  
Content Type ◽  
Light Emitting ◽  
Polyamide 12 ◽  
Lighting Conditions

Purpose – The purpose of this paper is to report selected optical properties of laser sintered polyamide 12 blank plates under different monochromatic and white light conditions and to apply these properties in production of laser sintered lithophanes. Design/methodology/approach – A UNICO 1201E spectrophotometer was used to measure the transmittance of laser sintered polyamide 12 plates as a function of plate thickness. Monochromatic light-emitting diodes were used to assess the wavelength dependence on the transmission and contrast as captured by a SONY DSC-W55 camera. Findings – The transmittance decreased with increasing plate thickness which varied significantly depending on the monochromatic wavelength. Highest transmission was observed using green light (525 nm) and poorest transmission was measured for yellow light (589 nm). Research limitations/implications – There is a limit to the amount of contrast obtained in polyamide lithophanes because the thickness of the plates is limited to less than about 5 mm. Greater thickness results in discernible topology on the lithophane which impairs the quality of the image. Originality/value – Light transmittance of polyamide 12 plates under different lighting conditions is reported and applied to optically defined laser sintered lithophanes.

New Redundant Manipulator Robot with Six Degrees of Freedom Controlled with Visual Feedback

2017 ◽  
pp. 231-255
Author(s):  
Claudio Urrea ◽  
Héctor Araya
Keyword(s):  
Visual Feedback ◽  
Degrees Of Freedom ◽  
Position Control ◽  
Vision System ◽  
Artificial Vision ◽  
Correct Operation ◽  
Six Degrees Of Freedom ◽  
Design And Implementation ◽  
Implementation Stages ◽  
Manipulator Robot

The design and implementation stages of a redundant robotized manipulator with six Degrees Of Freedom (DOF), controlled with visual feedback by means of computational software, is presented. The various disciplines involved in the design and implementation of the manipulator robot are highlighted in their electric as well as mechanical aspects. Then, the kinematics equations that govern the position and orientation of each link of the manipulator robot are determined. The programming of an artificial vision system and of an interface that control the manipulator robot is designed and implemented. Likewise, the type of position control applied to each joint is explained, making a distinction according to the assigned task. Finally, functional mechanical and electric tests to validate the correct operation of each of the systems of the manipulator robot and the whole robotized system are carried out.

The Study of Spatial Frequency Channels for Human Visual System

2019 ◽  
Vol 33 (06) ◽  
pp. 1955007
Author(s):  
Xiangyang Xu ◽  
Qiao Chen ◽  
Ruixin Xu
Keyword(s):  
Receptive Field ◽  
Spatial Frequency ◽  
Visual System ◽  
Human Visual System ◽  
Frequency Tuning ◽  
Tuning Curve ◽  
Vision System ◽  
Human Vision ◽  
Psychophysical Experiment ◽  
Human Vision System

Similar to auditory perception of sound system, color perception of the human visual system also presents a multi-frequency channel property. In order to study the multi-frequency channel mechanism of how the human visual system processes color information, the paper proposed a psychophysical experiment to measure the contrast sensitivities based on 17 color samples of 16 spatial frequencies on CIELAB opponent color space. Correlation analysis was carried out on the psychophysical experiment data, and the results show obvious linear correlations of observations for different spatial frequencies of different observers, which indicates that a linear model can be used to model how human visual system processes spatial frequency information. The results of solving the model based on the experiment data of color samples show that 9 spatial frequency tuning curves can exist in human visual system with each lightness, R–G and Y–B color channel and each channel can be represented by 3 tuning curves, which reflect the “center-around” form of the human visual receptive field. It is concluded that there are 9 spatial frequency channels in human vision system. The low frequency tuning curve of a narrow-frequency bandwidth shows the characteristics of lower level receptive field for human vision system, the medium frequency tuning curve shows a low pass property of the change of medium frequent colors and the high frequency tuning curve of a width-frequency bandwidth, which has a feedback effect on the low and medium frequency channels and shows the characteristics of higher level receptive field for human vision system, which represents the discrimination of details.

Sign in / Sign up

Export Citation Format

Share Document