scholarly journals Smartphone Based Image Color Correction for Color Blindness

2018 ◽  
Vol 12 (3) ◽  
pp. 104
Author(s):  
Lamiaa A. Elrefaei
Keyword(s):  
Color Vision ◽  
Color Blindness ◽  
Color Correction ◽  
Experimental Comparison ◽  
Color Vision Deficiency ◽  
Color Blind

<p class="0abstract">Color blind is a type of Color Vision Deficiency, which is the inability that a person could not realize the differences between some colors. There are three types of color blindness: Monochromacy, Dichromacy, and Anomalous Trichromacy. Color blind cannot be cured. Today, technology gets up with solutions to help people with color blindness to see the image and distinguish between the different colors using some algorithms. This paper presents a smartphone based experimental comparison of color correction algorithms for Dichromacy color-blind viewers. This comparison includes LMS Daltonization algorithm, Color-blind Filter Service (CBFS) algorithm, LAB color corrector algorithm, and the shifting color algorithm. The description of the smartphone based implementation details and parameters settings of these algorithms is presented. An application interface is implemented to enable the user to choose the algorithm that gives the most appropriate results. The results of these algorithms are compared to see their strength and weakness.</p>

Color Blindness in Mentally Retarded Children

1969 ◽  
Vol 35 (8) ◽  
pp. 609-616 ◽  
Author(s):  
Jerome D. Schein ◽  
John A. Salvia
Keyword(s):  
Sex Differences ◽  
General Population ◽  
Color Vision ◽  
Mentally Retarded ◽  
Color Blindness ◽  
Instructional Materials ◽  
Normal Children ◽  
Color Blind ◽  
Mentally Retarded Children

Recent studies of mentally retarded children have found substantially higher rates of color blindness than are usually reported for the general population. In 2 of these studies, sex differences in color blindness, invariably found in intellectually normal children, do not appear. Reanalysis of data from one of the studies of retarded children suggests the possibility that the high rates arise from the difficulty in comprehending the test and following the directions rather than from faulty color vision. However, even if the number of color blind retarded children is actually lower than these studies show, the need for research on this topic seems apparent. Using color dependent instructional materials with color blind, mentally retarded children may be detrimental.

scholarly journals Prevalence of Color Blindness in Undergraduates of Kathmandu University

2018 ◽  
Vol 56 (214) ◽  
pp. 900-903
Author(s):  
Reena Kumari Jha ◽  
Sukirty Khadaka ◽  
Yubina Gautam ◽  
Manisha Bade ◽  
Mukesh Kumar Jha ◽  
...  
Keyword(s):  
Color Vision ◽  
Cross Sectional Study ◽  
Color Blindness ◽  
Sectional Study ◽  
Cross Sectional ◽  
Color Blind

Introduction: Color blindness is X-linked recessive inherited disorder that occurs mostly in males and is transmitted through females. Many people with color blindness may remain undetected. Thus the present study aims to evaluate the incidence of color blindness among undergraduates of Kathmandu University. Methods: A cross-sectional study was conducted among 825 undergraduates, aged 17-25 years, from June to August 2018, in Kathmandu University, Kavre, Nepal. The Ishihara plates were used to evaluate the color vision of students under natural day light condition.Results: Study revealed that 24 (2.9%) undergraduates were color blind which include 24 male (5%) and no female. Among the color blind, five (20.3%), three (12.5%), two (8.33%) and 14 (58.33%) males were the victims of deuteranomaly, deuteranopia, protanomalia and total color blindness respectively. Color blindness is prevalent among the Brahmin 10 (3.9%), followed by Chettri 10 (2.72%) and Newar 4 (2.24%). Conclusions: Prevalence of color blindness is found to be higher in males 24 (5%) than females 0 (0%). Total color blindness is the most prevalent in our study. Screening enables the students to become aware of limitations and devise ways of overcoming them.

scholarly journals Spectral Filter Selection for Increasing Chromatic Diversity in CVD Subjects

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2023 ◽  
Author(s):  
Miguel Ángel Martínez-Domingo ◽  
Eva M. Valero ◽  
Luis Gómez-Robledo ◽  
Rafael Huertas ◽  
Javier Hernández-Andrés
Keyword(s):  
Color Vision ◽  
Color Blindness ◽  
Normal Observer ◽  
Computational Simulations ◽  
Spectral Filter ◽  
Color Vision Deficiency ◽  
Spectral Filters ◽  
Normal Color Vision ◽  
Selection For ◽  
Color Filters

This paper analyzes, through computational simulations, which spectral filters increase the number of discernible colors (NODC) of subjects with normal color vision, as well as red–green anomalous trichromats and dichromats. The filters are selected from a set of filters in which we have modeled spectral transmittances. With the selected filters we have carried out simulations performed using the spectral reflectances captured either by a hyperspectral camera or by a spectrometer. We have also studied the effects of these filters on color coordinates. Finally, we have simulated the results of two widely used color blindness tests: Ishihara and Farnsworth–Munsell 100 Hue (FM100). In these analyses the selected filters are compared with the commercial filters from EnChroma and VINO companies. The results show that the increase in NODC with the selected filters is not relevant. The simulation results show that none of these chosen filters help color vision deficiency (CVD) subjects to pass the set of color blindness tests studied. These results obtained using standard colorimetry support the hypothesis that the use of color filters does not cause CVDs to have a perception similar to that of a normal observer.

Two-Dimensional Biocompatible Plasmonic Lenses for Color Blindness Correction

2021 ◽  
Author(s):  
N. Roostaei ◽  
S. M. Hamidi
Keyword(s):  
Color Vision ◽  
Contact Lenses ◽  
Low Cost ◽  
Color Blindness ◽  
Color Filter ◽  
Two Dimensional ◽  
Simple Design ◽  
Plasmonic Lens ◽  
Color Vision Deficiency ◽  
Plasmonic Lenses

Abstract Color blindness, or color vision deficiency (CVD), is an ocular disease that suppresses the recognition of different colors. Recently, tinted glasses and lenses have been studied as hopeful devices for color blindness correction. In this study, 2D biocompatible and flexible plasmonic lenses were fabricated using polydimethylsiloxane (PDMS) and an innovative, low-cost, and simple design based on the soft nano-lithography method. These lenses were investigated for correction of red-green (deuteranomaly) color blindness. The plasmonic lens proposed herein is based on the plasmonic surface lattice resonance (SLR) phenomenon and offers a good color filter for color blindness correction. The biocompatibility, low cost, and simple fabrication of these contact lenses can offer new insights for applications of color blindness correction.

scholarly journals Prevalence of Color Blindness Among Medical Students

2021 ◽  
pp. 98-102
Author(s):  
Shahid Anwar Bhatti ◽  
Qundeel Zahra ◽  
Atif Mansoor Ahmed ◽  
Anum Haneef ◽  
Muhammad Saeed ◽  
...  
Keyword(s):  
Medical Students ◽  
Color Vision ◽  
Screening Program ◽  
Age Groups ◽  
Color Blindness ◽  
The Other ◽  
P Value ◽  
Chi Square ◽  
Cross Sectional ◽  
Color Blind

Aim: To find out the prevalence of color blindness among medical students. Study Design: Descriptive cross-sectional. Place and Duration of Study: Study was conducted at Chaudry Mohammad Akram teaching and research hospital, Superior university during December 2020 to May 2021. Methodology: All the medical students having age range between 21-25 years were included in the study. An ophthalmologist did ocular examination, after that color vision was checked by putting Ishihara plates. The score less than 12 out of 14 red-green test plates were labelled as color blind. Data was analyzed by using the SPSS version 20. Chi-square was used to find out the association of color blindness with age groups and gender. p-value less than 0.05 was considered as significant. Results: The mean age with standard deviation of study participants was 23.27 ± 0.87 years. The prevalence of color blindness among medical students was 2% out of which 1.7% were having strong red-green deficiency while only 0.3% were with mild red-green deficiency. Majority of participants with color blindness were noted in the age group of 22 years while very few were in the other age groups of medical students but these results were non-significant. On the other hand, all the color blind was male but no association was found as the p-value was more than 0.05. Conclusion: Current study reported that about 2% of medical students are affected by color vision deficiency. So there is a need of proper visual screening program among medical undergraduates for early detection of color blindness and counselling session for them.

scholarly journals Uso de simulação da visão de daltônicos na avaliação da informação cromática contida em embalagens | The color blinds vision simulation in the evaluation of color information contained in packages

2019 ◽  
Vol 16 (1) ◽  
pp. 76-93
Author(s):  
Wanessa Mayara Braz de Souza ◽  
Carla Patrícia de Araújo Pereira
Keyword(s):  
Color Vision ◽  
Technical Analysis ◽  
Color Blindness ◽  
Qualitative Approach ◽  
Exploratory Research ◽  
Color Coding ◽  
Color Information ◽  
Color Vision Deficiency ◽  
Rgb Images ◽  
Vision Simulation

Deficiências cromáticas visuais, popularmente conhecidas como daltonismo, afetam a capacidade dos indivíduos para identificar e/ou diferenciar cores. Para compreender como a deficiência afeta a percepção de informações cromáticas em embalagens, este estudo utiliza ferramentas de simulação para obter imagens próximas ao modelo de visão das cores observado por estes indivíduos. Realizou-se a análise com três embalagens, selecionadas por conveniência, caracterizando-se como estudo exploratório descritivo, de abordagem qualitativa. Foram constatadas alterações nos níveis de RGB e HSB das cores analisadas, provocando ruído na compreensão das informações cromáticas, uma vez que ocorre a descaracterização as cores originalmente propostas.*****Color vision deficiency, popularly known as color blindness, affects a portion of the population. They affect the ability of individuals to differentiate between colors and, consequently, to interpret information associated with color-coding. Based on this problem, exploratory research was carried out, with a qualitative approach, in which we evaluated the perception of color information contained in packages. The strategy used was the technical analysis, performed by the researchers, using a color blindness simulator. Changes were observed in the levels of red, green and blue (RGB) images, with important modifications in the hue, saturation, and brightness (HSB), decharacterizing the original chromatic design. The use of color blindness simulation allowed the identification of possible noises and ambiguities in the packaging interface.

scholarly journals Optimal Color Correction Based on Image Analysis for Color Vision Deficiency

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 154466-154479
Author(s):  
Jongho Choi ◽  
Jusun Lee ◽  
Hyeonjoon Moon ◽  
Seong Joon Yoo ◽  
Dongil Han
Keyword(s):  
Image Analysis ◽  
Color Vision ◽  
Color Correction ◽  
Color Vision Deficiency

A Review of Color Blindness for Microscopists: Guidelines and Tools for Accommodating and Coping with Color Vision Deficiency

2015 ◽  
Vol 21 (2) ◽  
pp. 279-289 ◽  
Author(s):  
Douglas R. Keene
Keyword(s):  
Color Vision ◽  
Color Blindness ◽  
Color Images ◽  
Journal Articles ◽  
Web Based ◽  
Color Vision Deficiency ◽  
Green Color ◽  
The Public ◽  
Adobe Photoshop ◽  
And Coping

Abstract“Color blindness” is a variable trait, including individuals with just slight color vision deficiency to those rare individuals with a complete lack of color perception. Approximately 75% of those with color impairment are green diminished; most of those remaining are red diminished. Red-Green color impairment is sex linked with the vast majority being male. The deficiency results in reds and greens being perceived as shades of yellow; therefore red-green images presented to the public will not illustrate regions of distinction to these individuals. Tools are available to authors wishing to accommodate those with color vision deficiency; most notable are components in FIJI (an extension of ImageJ) and Adobe Photoshop. Using these tools, hues of magenta may be substituted for red in red-green images resulting in striking definition for both the color sighted and color impaired. Web-based tools may be used (importantly) by color challenged individuals to convert red-green images archived in web-accessible journal articles into two-color images, which they may then discern.

scholarly journals Color Vision Deficiency in Medical Students in Jammu & Kashmir, India

2019 ◽  
Vol 26 (1) ◽  
Author(s):  
Masarat Nazeer ◽  
Snobar Bashir ◽  
Nadeema Rafiq
Keyword(s):  
Medical Students ◽  
Color Vision ◽  
Medical Profession ◽  
Color Blindness ◽  
Early Management ◽  
Color Vision Deficiency ◽  
Medical College ◽  
Cone Pigments ◽  
Color Vision Deficiencies ◽  
Time Of Admission

Non recognition of any of the three colors is known as color blindness. Color blindness is the commonly used term for deficiency of color vision. Word color blindness is a misnomer as anyone labeled as it, is extremely rare to be totally color blind hence more correctly called color vision deficiencies (CVD). Color vision is a function of three types of cone pigments present in retina. The incidence of Color vision deficiency is common in medical profession and affects the diagnosis and treatment of patients but still it remains the most neglected aspect of vision. Color is very important sign used in medical profession, but there is no effective screening for Color Vision Deficiency (CVD) at any level of medical profession. The present study was undertaken to find out CVD in medical students of Government medical college Srinagar. Material and Method: A total of 300 medical students (MBBS, BDS, NURSING) including 154 males and 146 females between 18-20 years of age were examined for CVD in Medical College using Ishihara pseudoisochromatic plates. After taking history on structured proforma the students were shown Ishihara’s test plates under day light at normal reading distance. Results: Among 154 males, 11 were color deficient (7.14%), and among 146 females, 1 (0.68%) had color vision deficiency. Deutranomalia (41.6%) was the most common type of CVD followed by Protanomalia (25%) then Protanopia (16.7%) and Deutranopia (16.7%), respectively. Conclusions: With this high incidence of color vision deficiency, students with CVD may feel difficulty in day-today practice in medical field. So, screening for CVD in medical students at the time of admission is very important which may help in early management of CVD and with timely counseling proper adaptive strategies can be adopted.

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