Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 130 for “"hue"”.
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A Comparison of Two Hue Scaling Methods
Hue scaling functions are designed to characterize color appearance by assessing the relative strength of the red vs. green and blue vs. yellow opponent sensations comprising different hues. However, these judgments can be non-intuitive and may pose difficulties for measurement and analysis. We …
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Effects of instrument panel luminance and hue on simulator driving performance and driver preferences
… instrument panels, were presented in different hues (eight levels), brightnesses (two levels), character sizes (four levels), and word complexities (two levels). The brightness levels had been subjectively determined in a preliminary experiment by subjects representative of the older and younger …
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An analysis of the effects of hue and display density on visual search performance
This study investigated the effect of hue on performance under different types of display density. In the past, researchers have primarily conceptualized density in terms of the total number of filled characters on the screen (i.e., overall density). Recently, however, Tullis (1983) suggested this …
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The determination of Dyers' perceived components of colour difference (depth, brightness and hue) between twp similar colours from theor spectral reflectance values
… difference (depth, ΔD, brightness, ΔB, and hue, ΔH*) from the reflectance values of a pair of dyeings, enabling the dyer to take full advantage of colorimetric analysis. The algorithm was based on extensive experimental work to map surfaces of constant visual depth throughout the colour …
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An Investigation of Color Memory as a Function of Hue, Saturation, Lightness and Observer Imagery Vividness for Blue, Green and Orange Test Hues
… which varied one of the three dimensions of hue, saturation and lightness at a time. Consistent with previous research, errors were greater for the lightness conditions followed by saturation, and least for hue conditions Additionally, a signal detection analysis indicated that d-prime was …
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Tests of a Functional Account of the Abney Effect
The Abney effect refers to changes in the hue of lights as they are desaturated. Normally the purity is varied by desaturating with a fixed spectrum. Mizokami et al. (2006, Journal of Vision, 6(9), 996-1007) instead varied purity by using Gaussian spectra and increasing their bandwidth. Under these …
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Colour differentiation in digitial images
… colour appearance is mainly determined by its hue, however, the value of brightness and saturation affects the colour appearance under certain conditions. To measure the colour difference between green and yellow, a series of experiments have been designed to measure the colour difference under …
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Reflexivity: A first demonstration
… training on two or three arbitrary tasks: AB hue-form and BC form-hue (and AC hue-hue) matching. Once they had acquired these tasks, they were tested for BB (form-form) reflexivity or BB’ (form-form) anti-reflexivity matching. Most (10 of 13) pigeons that received three arbitrary tasks showed …
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Prediction of Japanese color score
… ultimate pH, drip loss percentage, L*, a*, b*, hue angle, and chroma were significantly (P < 0.01) correlated to JCS. Correlation loading found 96% of the variation in firmness, pH, drip loss percentage, L*, a*, b*, and hue angle explained 81% of the variation in JCS. Three prediction equations …
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In vivo Measurement of Color Relationships between the Maxillary Central Incisor and Canine as a Function of Age
… <p>It has long been taught that the basic shade (hue) of the patient can be taken from the canine (i.e. that tooth thought to have the highest chroma of a particular hue) and then that hue can be applied to other anterior teeth but at a lower chroma. However, this concept does not appear to derive …
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Color Vision and its mechanisms in College students with Attention Deficit Hyperactivity Disorder
… on only one feature of color: namely that of hue in the children with ADHD. Accordingly, for this dissertation, I sought to extend the investigation on color vision by testing two key characteristics of color (hue and saturation) in college students with ADHD using both clinical (Mollon-Reffin …
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Assessing Color Discrimination
… discrimination based on color saturation and hue, standard color diagnostic tests were used to categorize college students as having normal or deficient color vision. The results argue that color saturation and hue impact human ability to discriminate colors, particularly as the delta E is …
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Gyvūnų aptikimas keliuose /
… Additionally, I used brightness, contrast, hue, saturation and horizontal image flip image augmentations, that were randomly applied to images while training the models. Only the hue augmentation did not have measurable positive impact on model’s prediction accuracy when using it as a …
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The effect of naturally fermented vegetable nitrites on the color of vacuum packaged fresh pork
… and surface L*, a* and b* values were measured. Hue and Chroma values were calculated for all color measurements. Linear and quadratic contrasts were evaluated on treatments for all measured and calculated color values. A linear (P<0.05) increase was detected on the L* values for days of vacuum …
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Circular Probabilistic Based Color Processing: Applications in Digital Pathology Image Analysis
… treatment, aware of the directional nature of hue, the study innovates to model a hue distribution of an image using a circular mixture distribution, and provides a complete hue-based pixel clustering solution through maximum likelihood estimation. The second method aims to address the …
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Prothonotary Warbler (Protonotaria citrea) Plumage as an Indicator for Infection: the Relationship between Haemosporidia Infection and Breast Feather Reflectance in a Neotropical Migrant Passerine
… Analysis evaluating Intensity, Brightness, Hue, UV Intensity, UV Brightness, and UV Chroma. UV and visible light reflectance was higher in birds sampled earlier in the field season (early clutch) (p=0.0017 and p=0.0743 respectively). There was no relationship between infection and either …
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Evaluation of variability of instruments used in pork quality assessments
… redness (a*), and yellowness (b*), chroma and hue. Based on previous research, the average untrained consumer is able to distinguish approximately 3-L* units, 0.4-a* units, and 0.9-hue angle units. Loins evaluated with machine 1 were 0.71 L* units darker (P < 0.01), 1.09 b* units more yellow (P …
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