Color Research and Application最新文献

{"title":"Comparative analysis of four color vision screening tests benchmarked by anomaloscopy for detection and investigation of protanomaly and deuteranomaly","authors":"Peter A. Davison,&nbsp;Grainne Scanlon","doi":"10.1002/col.22929","DOIUrl":"10.1002/col.22929","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Significance</h3>\u0000 \u0000 <p>Clinicians, occupational health personnel, and educationalists need to make an appropriate choice of color vision screening test or tests when screening for color vision deficiency (CVD). Four color vision screening tests were assessed on the same sample of subjects against the anomaloscope as a reference, enabling direct comparison of these tests. Two of the tests are available in revised form, one has received little attention for inherited CVDs.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Purpose</h3>\u0000 \u0000 <p>The objective of this study was to examine three new or revised color vision screening tests, together with the Ishihara, on their (1) sensitivity, (2) specificity, and (3) ability to provide a tentative assessment of severity and of differentiation between protanomaly and deuteranomaly deficiencies.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Data from 104 color deficient and 38 color normal subjects were analyzed. The Hardy–Rand–Rittler (4th edition), City University (3rd edition), Ishihara (2005), and Mollon–Reffin tests were evaluated against the Oculus Heidelberg multi-color anomaloscope. All screening tests were performed before anomaloscopy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Sensitivity was comparable for the Ishihara, Hardy–Rand–Rittler, and City University tests (Chi-square = 3.26, df = 2, <i>p</i> &gt; 0.05), whereas the Mollon–Reffin had best specificity (100% using a threshold value of two). Compared with all other screening tests the Hardy–Rand–Rittler was the best at correctly classifying a deficiency: protanomaly (75%) and deuteranomaly (82%). While the Ishihara was good at detecting deutans (100%), it misclassified 100% of protans as being deutan. Finally, the Hardy–Rand–Rittler was the only screening test to successfully separate mild from medium severity of deficiency.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Selection of screening test is dependent on the intended outcome of screening. Referral for more definitive CVD assessment is the preferred option.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 5","pages":"474-485"},"PeriodicalIF":1.2,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140560206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A computational method for predicting color palette discriminability","authors":"Stephen Westland,&nbsp;Graham Finlayson,&nbsp;Peihua Lai,&nbsp;Qianqian Pan,&nbsp;Jie Yang,&nbsp;Yun Chen","doi":"10.1002/col.22927","DOIUrl":"10.1002/col.22927","url":null,"abstract":"<p>Automatic analysis of images is increasingly being used to generate color insights and this has led to various methods for generating palettes. Several studies have recently been published that explore methods to predict the visual similarity between pairs of palettes and these methods are often used to evaluate different generative methods. This work is concerned with being able to predict visual similarity between color palettes. Three data sets (two of which were previously published) are used to evaluate two methods for predicting visual similarity between palettes. A novel palette-difference metric (based on the Hungarian algorithm) is compared to the previously published minimum color difference model (MICD) and was found to agree better with the visual data for two of the three data sets. Agreement between models and visual data was also better for CIEDE2000 (1, 2) than for CIELAB metrics.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 5","pages":"465-473"},"PeriodicalIF":1.2,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/col.22927","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140366722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multi-primary trichromator to derive individual color matching functions and cone spectral sensitivities","authors":"Keyu Shi,&nbsp;Ming Ronnier Luo,&nbsp;Andrew T. Rider,&nbsp;Tingwei Huang,&nbsp;Lihao Xu,&nbsp;Andrew Stockman","doi":"10.1002/col.22928","DOIUrl":"10.1002/col.22928","url":null,"abstract":"<p>Measuring color matching differences between observers is an important means of investigating individual differences in human color vision. In this article, we introduce a new LED-based visual trichromator with which we have estimated color matching functions and cone spectral sensitivities in a group of five normal observers. The trichromator has side-by-side semi-circular matching fields that are illuminated by two spectrally tunable LED light sources, each comprised of 18 LEDs with center wavelengths ranging from 400 to 700 nm. We used Maxwell's method to derive a set color match. A fixed triplet of red-green-blue (RGB) primaries produced the white standard field of 120 cd/m² in one field. The other field, the mixture field, was illuminated by one of 11 different triplets of lights with various center wavelengths. Observers adjusted the intensities of the triplets in the mixture field to match the white standard field. All matches were made for field diameters of 2° and 10° of visual angle to allow comparisons with colorimetric standards and were repeated five times. Calibrations and tests showed that the trichromator and the measurements were stable and repeatable. Grassmann's laws predict that at the 11 color matches the excitations in the three cone types should be the same. Consequently, we can use those matches and a model of how cone spectral sensitivities vary between individuals to estimate the three underlying corneal cone spectral sensitivities for each observer (and thus how they vary from the standard (or mean) observer). We find good agreement with the CIE 2006 standards, but our observers show small but consistent differences.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 5","pages":"449-464"},"PeriodicalIF":1.2,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/col.22928","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental color analysis and facade color design in a street rehabilitation: Adana, Kayalıbağ","authors":"Esra Küçükkılıç Özcan,&nbsp;Kasım Çelik","doi":"10.1002/col.22926","DOIUrl":"10.1002/col.22926","url":null,"abstract":"<p>Streets and buildings that become inactive within the historical texture of cities can be restored to the district through rehabilitation projects and color designs, which encourage urbanites to use them more actively. Such spaces are especially important for urban memory, yet they risk losing their integrity over time due to uncontrolled development. Therefore, making them available for urban use is important for socio-cultural and economic development. This study involves the application, under a rehabilitation project, of a holistic approach to façade color design for buildings located on two streets in the center of Adana, a city in southern Turkey that dates back to the Common Era. The study began with collecting color samples from the area as part of environmental color analyses, after which the colors of the samples were measured. In line with the environmental characteristics that affect color perception, a range of colors with Munsell's equivalent value and hue contrast was considered appropriate for application to the facades of buildings in the Kayalıbağ neighborhood. In the color design, five different hues with high-value (light) and low chroma were selected to increase the attractiveness of the historically and archeologically highly significant district. The aim of the color design was to increase the livability and attractiveness of the district, while not overshadowing the cultural qualities of the urban environment.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 5","pages":"433-448"},"PeriodicalIF":1.2,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140323002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Color blindness and semantic knowledge: Cognition of color terms from elicited lists in dichromats and normal observers","authors":"Humberto Moreira,&nbsp;Leticia Álvaro,&nbsp;Julio Lillo","doi":"10.1002/col.22925","DOIUrl":"10.1002/col.22925","url":null,"abstract":"<p>Color blindness (color vision deficiency) affects ~8% of males and ~ 0.4% females worldwide. Here we use the elicited lists method to investigate their semantic knowledge regarding “basic color terms” and their relationships. Lists were obtained from color vision deficient and normal observers. 32 dichromats (15 protanopes, 17 deuteranopes) and 32 normal trichromats (17 females, 15 males) diagnosed by a battery of color tests (Ishihara, City University Test, anomaloscope) wrote monolexemic lists of colors. Psychological salience of terms (ln(CSI)), adjacency between pairs of terms (ADJ; MDS) and the presence of clusters of terms defined on the basis of the Universals and evolution hypothesis were analyzed. All four groups of participants showed the same semantic memory structure: lists started with the cardinal primaries cluster (blue, red, yellow, green), followed by the achromatic primaries cluster (black and white), or the derived cluster (brown, orange, violet, pink, purple, and gray). After the clusters (cardinals, achromatics, and derived), a highly variable number of non-basic terms appeared. This number was higher in normal trichromats. Non-basic terms were not part of any cognitive cluster. The similarity in the lists of trichromats and dichromats suggest that both may acquire similar semantic knowledge about color terms. Several potential explanations are considered.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 5","pages":"420-432"},"PeriodicalIF":1.2,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/col.22925","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140181783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of color degradation in package prints: Analyzing kinetics with principal component analysis","authors":"Anirban Das,&nbsp;Mahasweta Mandal","doi":"10.1002/col.22924","DOIUrl":"10.1002/col.22924","url":null,"abstract":"<p>Color degradation is a pressing issue in various fields like food and medicine packaging, as well as printed materials, leading to a loss or distortion of vital information. Therefore, understanding how the color of package prints evolves over time is essential for product quality assessment and effective product life cycle management. This study focuses on investigating color changes in prints on blister foils, widely used in the medicine and packaging industries. To assess fading characteristics, samples printed via the gravure process have been exposed to a Xenon Test Chamber (B-SUN). Spectrophotometric measurements of the prints have been conducted using a spectroradiometer, and the data have been analyzed using principal component analysis (PCA). The fading nature of cyan and black prints aligns with Type IV, while magenta and yellow prints correspond to Type II, as described by Giles. Notably, cyan and black inks demonstrated resistance toward fading at the end of the exposure, with a minor exception. The investigation involved curve fitting, revealing a consistent first-order kinetic model governing fading rates throughout the exposure time. High <i>R</i>² values (0.96–0.99) and low root means square error values (0.02–0.08) are observed across all cases. While color fading involves diverse kinetics, the fading rate consistently adheres to a singular first-order kinetic path. The study highlights that yellow ink is most sensitive to light, followed by magenta ink. These findings offer valuable insights for optimizing packaging materials and ensuring product quality in industries reliant on printed materials. By mitigating color degradation, manufacturers can enhance the longevity and appeal of their products, reinforcing consumer trust and satisfaction. Furthermore, the effective utilization of PCA as a data analysis tool offers a valuable approach for future investigations in color science and related fields.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 4","pages":"401-415"},"PeriodicalIF":1.4,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140168442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Connecting the new to the past: The Color-Material-Finish design approach applied to the Fortezza da Basso","authors":"Francesca Valan,&nbsp;Pietro Paglierani","doi":"10.1002/col.22923","DOIUrl":"10.1002/col.22923","url":null,"abstract":"<p>This article presents the Color-Material-Finish (CMF) project developed for the renovation of Fortezza da Basso in Florence, Italy. Fortezza da Basso—a large, fortified complex consisting of old and new buildings—is the main venue in Tuscany for international exhibitions and cultural activities. In 2010, the Municipality of Florence started its restoration, which is still ongoing. The goal is to renovate the Renaissance parts of the fortress and replace the 20th-century pavilions with environmentally sustainable buildings, harmonically integrated in the context. The renovation started with a project aimed at assessing the preservation status of the fortress. In 2016, the Municipality of Florence developed a body of design rules, the “Fortezza System,” dedicated to the design of new buildings within the fortress. A key role was assigned to CMF design: at first, to identify the fortress CMF identity; then, to develop CMF prescriptions to harmonically integrate the new constructions with the historic parts. The CMF approach required for such an ambitious plan also had to be flexible and with wide design margins to allow architects experiment innovative CMF languages. Such conflicting needs were met by designing a CMF approach based on Chromatic Areas, that is, usable continuous areas in the color space rather than on color charts based on lists of allowed historical colors. The article shows how the developed CMF approach can contribute to the full preservation of the Fortezza historical identity and at the same time increase the autonomy of architects in their material and color choices.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 4","pages":"384-400"},"PeriodicalIF":1.4,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140115222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between brightness perception and skin color influenced by experimental method","authors":"Yuanyuan He,&nbsp;Hiromi Sato,&nbsp;Chanprapha Phuangsuwan,&nbsp;Kitirochna Rattanakasamsuk,&nbsp;Yoko Mizokami","doi":"10.1002/col.22921","DOIUrl":"10.1002/col.22921","url":null,"abstract":"<p>Facial brightness perception is affected by skin color. It was reported that reddish skin was matched with a higher lightness scale stimulus than yellowish skin among Japanese observers. However, this trend is inconsistent among Thai, Korean, Chinese, and European observers, implying the influence factors, such as ethnicity, environment, and judgment criteria. In this study, we investigated the influence of the experimental method on facial brightness perception using test stimulus images with constant lightness and different hue angles. We examined two instructions (“Appearance match” vs. “Brightness match”) and the scale stimulus for matching (a uniform color patch vs. a face image). We further conducted an impression evaluation experiment of the whole face. The matching results from the Japanese showed a similar trend in both instructions and scale stimuli under most conditions, suggesting that matched brightness is not influenced by instruction and the complexity of scale stimuli. The impression evaluation results were similar for Thai, Japanese, and Chinese observers, with reddish faces being evaluated with higher scores in brightness. Our findings suggest the influence of experimental methods on facial brightness judgment. The holistic judgment of facial brightness would be universal among different East Asian groups, at least for the range of variation in skin color we used.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 4","pages":"360-373"},"PeriodicalIF":1.4,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139956842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study on the impressions induced by lipstick colors","authors":"Yu-An Wu,&nbsp;Shi-Min Gong,&nbsp;Wen-Yuan Lee","doi":"10.1002/col.22922","DOIUrl":"10.1002/col.22922","url":null,"abstract":"<p>Owing to the need for beauty in modern society, cosmetics are essential to enhance femininity and attractiveness. Lipstick is effective in reinforcing femininity and increasing beauty. This study conducted a psychophysical experiment to investigate the association between lipstick colors and the impressions they create. Thirty-five observers were invited to participate in the experiment. They were asked to assess 20 lipstick colors on 23 impression scales. The results showed that the impressions created by the lipstick colors comprised three factors: charm, cuteness, and contemporary. Charm was correlated with <i>a</i>* and lightness value of lipstick color and the color difference between lipstick-skin colors. Cuteness was negatively correlated with the hue angle of the lipstick colors and lightness differences between lipstick-skin colors. Contemporary was correlated with chroma differences and negatively correlated with <i>b</i>* of lipstick color. These lipstick colors can be classified into three groups based on impression factors. The results showed that <i>a</i>* value of lipstick color and the color difference (<span></span><math>\u0000 <mrow>\u0000 <mo>△</mo>\u0000 <mi>E</mi>\u0000 </mrow></math>) between lipstick and skin color are identified to determine the grouping of lipstick colors.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 4","pages":"374-383"},"PeriodicalIF":1.4,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139945434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring color concepts in physics education: Addressing common preconceptions among teachers-in-training","authors":"Guadalupe Martínez-Borreguero,&nbsp;Francisco L. Naranjo-Correa,&nbsp;Milagros Mateos Nuñez","doi":"10.1002/col.22919","DOIUrl":"10.1002/col.22919","url":null,"abstract":"<p>In the field of physics education, the identification of students' preconceptions—especially regarding light and color—has been pivotal, as these foundational ideas often persist through higher education. Within teacher education, this is particularly crucial, as these early conceptions can deeply influence how future educators understand and teach these concepts, highlighting the need for an approach that weaves these initial understandings into a coherent scientific framework. Instructing students on color concepts reveals that many grapple with the fundamental optical principles. These initial understandings are integral to designing educational sequences that facilitate conceptual evolution, allowing for a deeper grasp of scientific ideas. This study aimed to examine and interpret the initial conceptions that aspiring primary and secondary educators hold about color and its optical fundamentals, while also developing and applying virtual teaching resources to promote a conceptual change about these foundational concepts. A quasi-experimental approach was employed, comprising control and experimental groups, and utilizing both qualitative and quantitative methods for a comprehensive analysis. Engaging 409 trainee teachers through non-probabilistic sampling, the study stratified participants by degree program. These groupings facilitated a comparative evaluation of the pedagogical efficacy of the educational resources developed. The study utilized an online assessment comprising single-answer multiple-choice questions, grounded in prior research, which was psychometrically validated. Educational tools were then developed and implemented to foster a deeper understanding of color concepts among prospective teachers. Results analysis highlighted the existence of preconceptions about color among participants from diverse educational backgrounds. The interventions employed were effective in catalyzing a shift in conceptual understanding and in elevating the knowledge levels of the trainee teachers.</p>","PeriodicalId":10459,"journal":{"name":"Color Research and Application","volume":"49 3","pages":"339-355"},"PeriodicalIF":1.4,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139518675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}