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.
Results
Showing 1 to 20 of 32 for “"Chromaticity"”.
-
The Age-Related Dynamic Accommodative Characteristics Associated With Light Intensity and Chromaticity
… under various conditions of the intensity and chromaticity of light. To ascertain the effects of aging, ten individuals from each of three age groups (i.e., younger group: 20 to 29 years old, middle-aged group: 40 to 49 years old, and older group: 60 to 69 years old) were recruited, and their …
-
Robust and efficient image-based 3D modeling
… and then a robust solution for illumination chromaticity estimation based on a new correspondence matching invariant called Illumination Chromaticity Constancy. I next propose a new framework based on bilateral filtering and loopy belief propagation for simultaneous estimation of surface …
-
Optical Properties of Rare-Earth Doped YBO3 Phosphor Materials
… ultraviolet region (UV) but this material has a chromaticity problem due to its orange (591 nm, O) and red (611 & 627 nm, R) emission. The red color along with high efficiency is desirable for PDPs and phosphor-based WLEDs applications. In this work to address chromaticity problem and efficiency …
-
Accomodation with displays having color contrast
… the effect of viewing characters of one chromaticity and purity on a background of another chromaticity or purity or chromaticity and purity. The observer's accommodation response was continuously sampled throughout the presentation of each target/background combination. Mean …
-
SIMPLE AND CONTINGENT CHROMATIC AFTEREFFECTS IN PIGEONS
… tests involving novel stimuli indicated that a 'chromaticity' concept had been acquired by all four birds.</p><p>In Experiment II, an attempt was made to demonstrate the McCollough effect (ME). In five procedures, various conditions known to produce a maximally strong ME in humans were arranged …
-
Colour analysis and the classification of fruit
… XYZ tristimulus values; the CIE 1931 x ,y ,z chromaticity coordinates; the CIE 1960 L, u, v uniform chromaticity scale (UCS); the Munsell colour wheel of hue, value and chroma (HVC); the L*u*v* system; the L *a*b* system; the Red, Green and Blue (RGB) system; and the hue, saturation and …
-
The use of the LANDSAT MSS in the study of land use/cover and water quality relationships: a case study of the Lake Anna Watershed
… levels within Lake Anna were estimated by the chromaticity technique used by Munday et al and were correlated to two groups of ground-based data -- surface turbidity levels and the product of the Universal Soil Loss Equation (USLE). Estimated turbidity levels correlated moderately well with …
-
Evaluation of Two Lipid-Based Edible Coatings For Their Ability to Preserve Post Harvest Quality of Green Bell Peppers
… rates, dehydroascorbic acid content, and chromaticity values. Respiration rates and DHA were significantly higher during the last two weeks of the study (p=0.0001, p=0.0001 respectively). Chromaticity values were significantly lower, indicating a more faded color on the 14th day of the …
-
Development of new fluorescence spectroscopy approaches for the study of silica
… motion. In aqueous solution, PDMPO showed strong chromaticity with correlation between the maximum emission wavelength for PDMPOH+* and dielectric constant (4.8-80). Chromatic effects were also observed for silica bound dye which allow its use as a direct probe of bulk pH over a range far in …
-
PhETA: An Interactive Tool for Analyzing the Quality of Digital Photographs from Edge Transitions
… we are interested in the luminance and chromaticity behavior at edge boundaries. We use this model to develop PhETA — Photograph Edge Transition Analyzer — an interactive tool that allows novice users to view and understand the results gained from this analysis in a clear and …
-
A statistical approach for shadow detection using spatio-temporal contexts
… of shadows, such as luminance reduction, chromaticity consistency and texture consistency, we introduce a nonparametric framework for modeling surface behavior under cast shadows. To each pixel, we assign a potential shadow value with a confidence weight, indicating the probability that …
-
Compensation Techniques in Accelerator Physics
… project at Jefferson Laboratory. Several chromaticity (the energy dependence of the particle tune) compensation methods are evaluated numerically and deployed in a figure eight ring designed for the electrons in the collider. Furthermore, transverse coupling optics have been developed to …
-
Vejos mišinio lapų atspindžių matomoje ir artimojoje infraraudonoje šviesoje tyrimas /
… p=0,0038) and green 0,1208, p=0,0086). The CIE chromaticity diagram shows changes of sward leaves color when plants grow in water stress and different concentration of KNO3 nutrients conditions.
-
Modelling image quality for automotive display technologies
… is scaled based colour gamut in the CIE1931 chromaticity diagram. It was shown that image quality rating rises with growing perceived contrast; the limiting factors are glare and perceived blackness. In colourfulness scaling a linear relationship between colour gamut and colourfulness rating …
-
Chromatic sensitivity: effects of light level and selective photoreceptor adaptation
… the other cone classes and hence independent of chromaticity and light level. The effect of adapting different areas of the peripheral retina when thresholds are measured foveally was also investigated. No long range retinal interactions were observed. The results show that the adaptation state …
-
Passive Electrical Properties of Horizontal Cells in the Retina of the Turtle, Pseudemys Scripta Elegans
… 20 ms pulses of current in luminosity-type and chromaticity-type horizontal cells. The time course of the relaxation was described by the sum of two exponentially decaying processes. The passive responses were analyzed in terms of a finite cable model; values for equivalent electrotonic length …
-
The Use of Landsat Thematic Mapper in the Study of Landuse/Cover and Water Quality Relationships
… within the two reservoirs were estimated by the chromaticity technique and were compared to measured data from previous reports for both reservoirs. Remote sensing was successful in detecting the changes in landuse in both areas. The estimated turbidity levels correlated moderately well with …
-
Perception of Lighting and Reflectance in Real and Synthetic Stimuli
… stimuli. We find that by matching the chromaticity of an LCD screen to the surrounding lighting and using a realistic texture, LCD screens can be made to appear similar to physical paper. Finally, Chapter 4 is an extension of the ideas from Chapter 3, in which the knowledge about how to …
-
The time-course of colour vision
… not achieved instantaneously after an illuminant chromaticity shift and that constancy of colour appearance judgements increases over several seconds.
-
Precursors for perylene diimide dendrimers : synthesis and photophysics
… controlled in order to obtain reproducible chromaticity and efficiency. In this research, the first generation of a water/organic solvent soluble 3,4,9,10-Perylene Tetracarboxylic Diimide (PDIs) dendrimer (PDI1.0) was synthesized in one step in good yield. In further steps, PDI1.5 compounds …
Page 1 of 2