Systems for arranging and describing color include “color spaces” and “color order systems.” In a color space, tristimulus values R, G, and B are computable for every light (every point in the space). In familiar color spaces, such computation makes use of three functions of wavelength (the color-matching functions that define one of the CIE Standard Observers), one function corresponding to ea...

PURPOSE To identify the most appropriate test for screening of early color vision abnormalities in uncomplicated juvenile diabetes. METHODS Enrolled in this study were 39 diabetic adolescents, characterized by optimal Early Treatment Diabetic Retinopathy Study criteria for visual acuity, transparent dioptric means and angiographically normal retinas. Color vision was examined with Standard Ps...

It is well-known that the knowledge of the natural geometry of a problem is often crucial in finding solutions. Problems involving functions on a circle are, for example, often solved using the theory of Fourier series. This is the mathematical explanation of the enormous success of the DFT, FFT and DCT-based methods. Another example is the relation between scaling properties and wavelet theory...

The current paper proposes an illuminant estimation algorithm that estimates the spectral power distribution of an incident light source using its chromaticity determined based on the perceived illumination and highlight method. The proposed algorithm is composed of three steps. First, the illuminant chromaticity of the global incident light is estimated using a hybrid method that combines the ...

The purpose of this proposal is to obtain funding for a collaborative project between members of the Munsell Color Science Laboratory (MCSL) and Digital Imaging and Remote Sensing Laboratory (DIRS) to investigate the application of color in the visualization of highdimensional remote-sensing products for interpretation and exploitation. Using a spectral unmixing algorithm for land classificatio...

PURPOSE To investigate color perception and contrast sensitivity with and without additional glare in pseudophakic patients with a conventional intraocular lens (IOL) in one eye and a blue light-filtering IOL in the fellow eye. METHODS Twenty-three bilaterally pseudophakic patients with a conventional IOL (AcrySof SA60AT) and a blue light-filtering IOL (AcrySof Natural SN60AT) were tested for...

Abstract Purpose To compare quantitative visual tests, such as acuity, contrast sensitivity, and color vision tests in patients with primary open-angle glaucoma (POAG) according to three different light systems color-rendering index (CRI). Methods This was a cross-sectional study of 36 eyes POAG. Three consisting 3-band fluorescent lamp (CRI 80), white LED 75), quantum dot > 95) were used. A...

PURPOSE To study acquired color vision and visual field defects in patients with ocular hypertension (OH) and early glaucoma. METHODS In a prospective study we evaluated 99 eyes of 56 patients with OH without visual field defects and no hereditary color deficiencies, followed up for 4 to 6 years (mean = 4.7 +/- 0.6 years). Color vision defects were studied using a special computer program for...

Scientists use digital camera data as the input to their analysis of image processing algorithms. In this paper we measured the "engineered color errors" introduced by digital camera color processing. Camera manufactures build their color management systems using the sRGB design standard. Although that sRGB is a guideline in the beginning, the final firmware shows certain liberties taken to mak...