This paper presents a method for developing color-difference models near a threshold, based on the serial exploration method described by Torgerson [Theory and Methods of Scaling; Wiley & Sons (1958); Chap. 7], involving the construction of color-control strips of patches arranged in arrays of 2 × n, where n is the number of pairs in the strip. The patches in the lower row should be calorimetrically identical, while the color of the patches in the upper row should vary progressively in constant steps of CIELAB color difference along selected color space vector directions. Prospective observers are instructed to indicate the patch pair number for which they begin to perceive a slight color difference between corresponding patches. The frequency data obtained from the observers was used to build a threshold color-difference model. The intention was to validate the method with theoretical data to determine the effect of the precision with which the strips are constructed, on the accuracy of the estimated parameters. Theoretical frequency data was generated using the CIE94 color difference formula, whose associated color discrimination ellipsoid parameters are very easy to determine, associated with a hypothetical logistic psychometric curve for different color centers. The proposed method allows to determine color discrimination parameters with a precision nearby 4% and an accuracy of 3% with respect to the simulated theoretical parameters, for color samples generated with a standard deviation of ∗=0.2 of the superimposed error around the ideal color difference of pairs of patches.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.395256 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Impact of the resin cement opacity on the final color of conservative ceramic restorations and on its ability to mask substrates of different saturations.
Dent Mater
January 2025
Department of Biomaterials, School of Dentistry, University of São Paulo, Sao Paulo, Brazil.
Objective: To analyze the impact of the translucency/opacity of two commercial brands of resin cements and different translucency of lithium disilicate on the masking ability of saturated substrates.
Methods: 120 samples (n = 5) were prepared using 0.5 mm lithium disilicate (IPS e.
Advanced thyroid nodule detection using ultrasonography image analysis and bilateral mean clustering strategies.
Comput Biol Med
January 2025
Department of Computing Technologies, School of Computing, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603203, India. Electronic address:
This research work focuses on developing an advanced diagnostic method for thyroid nodules using ultrasonography images. The core idea revolves around the observation that the presence and amount of calcium flecks in thyroid nodules can indicate their severity, potentially leading to severe thyroid cancer. A novel technique, named Bilateral Mean Clustering Strategy (Bi-MCS), is proposed, combining the strengths of Fuzzy C mean and K-mean clustering approaches.
View Article and Find Full Text PDFThe effect of plasma-treated nutrient solution on yield, pigments, and mineral content of rocket [ (L.) DC.] grown under different nitrogen fertilization levels.
Front Plant Sci
December 2024
Research Centre for Vegetables and Ornamental Crops, Council for Agricultural Research and Economics (CREA), Pescia (PT), Italy.
Introduction: The non-thermal plasma (NTP) technique has been suggested as a sustainable horticultural practice to promote biomass accumulation, nutrient uptake, N metabolism, and disease prevention in plants. In particular, the potentiality of this technique to promote the natural accumulation of nutrients into plants deserve to be explored as input saving is strongly recommended in the horticultural sector.
Methods: The nutrient solution supplied to a red coloured variety of rocket salad [ (L.
Transforming grayscale MRI images to color utilizing generative artificial intelligence to better understand multiple sclerosis.
J Cent Nerv Syst Dis
January 2025
CRCSEP, Université Nice Cote d'Azur, Nice, France.
Multiple sclerosis (MS) falls within the spectrum of central nervous system (CNS) demyelinating diseases that may lead to permanent neurological disability. Fundamental to the diagnosis and clinical surveillance is magnetic resonance imaging (MRI) that allows for the identification of T2-hyperintensities associated with autoimmune injury that demonstrate distinct spatial distribution patterns. Here, we describe the clinical experience of a 31-year-old, right-handed, White man seen in consultation at The University of Texas Southwestern Medical Center in Dallas, Texas, following complaints of headaches that began after head trauma related to military service.
View Article and Find Full Text PDFApplication of response surface methodology in the formulation of spreadable creams from beechnut seeds as sustainable ingredient.
Food Sci Technol Int
January 2025
Food Engineering Department, Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine Cluj Napoca, Cluj Napoca, Romania.
Plants available in the spontaneous flora are recently studied as ingredients for food formulation in response to the demands for sustainable plant-based foods. The aim of this study was to obtain a new assortment of spreadable creams, free of palm oil, with good textural, rheological and colour attributes, high antioxidant activity and low cytotoxicity, from . (European beech) seeds.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!