Case studies in the psychophysics, modeling and localization of human vision are presented as an example of "hands-on" philosophy of the cog nitive sciences. These studies also yield important results for familiar problems in philosophy of mind: the explanatory gap surrounding phenomenological feels is not closed by the kinds of investigations surveyed. However, the science is able to explain s...

The accepted model of color naming postulates that 11 “basic” color terms representing 11 common perceptual experiences show increased processing salience due to a theorized linkage between perception, visual neurophysiology, and cognition. We tested this theory, originally proposed by Berlin and Kay in 1969. Experiment 1 tested salience by comparing unconstrained color naming across two langua...

The evolution of color categorization is investigated using computer simulations of agent population categorization games. Various realistic observer types are implemented based on Farnsworth-Munsell 100 Hue Test human performance data from normal and anomalous trichromats, dichromats, and humans with four retinal photopigments. Results show that (i) a small percentage of realistically modeled ...

The MPEG-21 Multimedia Framework allows visually impaired users to have an improved access to visual content by enabling content adaptation techniques such as color compensation. However, one important issue is the method to create and interpret the standardized CVD descriptions when making the use of generic color vision tests. In Part I of our study to tackle the issue, we present a novel com...

Observers matched patches (simulated Munsell papers) in two simultaneously presented computer-controlled displays, a standard array presented under 6500-K illumination and a test array under 4000 or 10,000 K. Adaptation to the test illuminants was limited. The adjusted patch was surrounded by a single color (annulus display) or by many colors (Mondrian display). Observers either matched hue and...

In this paper, a new model to grade cured tobacco leaves using symbolic data is proposed. Color features such as average and standard deviation of hue of tobacco leaves are extracted using the Munsell color system. The extracted features of each grade are aggregated and represented in the form of inter-valued type data and stored in the knowledgebase. For a given test sample of a cured tobacco ...

The ability of color-deficient observers to discriminate between illuminant changes and surface-reflectance changes in a scene was tested with natural and Munsell reflectance spectra. To avoid the confounding effects of spatial structure, stimuli were simulations of Mondrian-like colored patterns, presented on a computer-controlled color monitor. Protanopes performed less well than normal trich...

Colour constancy is the phenomenon where the chromaticity of a surface material appears to remain constant to an observer under different illuminants. Studies have shown human vision exhibits colour constancy to varying degrees. Digital camera sensors completely lack this property, resulting in pictures with unsightly colour casts. This paper presents a method for semi-automatically removing co...

In this chapter, we present a novel method of grading cured tobacco leaves, which is the final and vital stage of precision agriculture of tobacco crop. The MUNSELL color model is used to extract color features such as average and standard deviation of hue of cured tobacco leaves of each grade. The extracted features of each grade are aggregated and represented in the form of inter-valued type ...