One of the most fundamental features of scientific visualization is the process of mapping scalar values to colors. This process allows us to view scalar fields by coloring surfaces and volumes. Unfortunately, the majority of scientific visualization tools still use a color map that is famous for its ineffectiveness: the rainbow color map. This color map, which näıvely sweeps through the most s...

Color, after position, is among the most effective visual variables to encode information. It is pre-attentively processed by the visual system, and if used appropriately, supports detection and correlation of patterns. Several global color mapping schemes (such as linear, non-linear and histogram-based) exist that support certain analysis tasks. However, static global schemes map data with a s...

Eleven tone-mapping operators intended for video processing are analyzed and evaluated with camera-captured and computer-generated high-dynamic-range content. After optimizing the parameters of the operators in a formal experiment, we inspect and rate the artifacts (flickering, ghosting, temporal color consistency) and color rendition problems (brightness, contrast and color saturation) they pr...

In this article, a new gamut-mapping algorithm (GMA) that utilizes variable anchor points (center of gravity on the lightness axis) is proposed. The proposed algorithm increases lightness range, which is reduced from conventional gamut mapping toward an anchor point. In this process, this algorithm utilizes multiple anchor points with constant slopes to both reduce a sudden color change on the ...

Color quantization considers the problem of mapping the continuous color space into a limited number of discrete colors or representing a full color digital image using fewer colors. Usually, the set of available colors for the output image is called a color palette. The selection of an optimal color palette and the optimal mapping of each pixel of the image to a color from the palette form the...

Perceptual consistency is important in many computer vision applications. Unfortunately, except for color, computational features and similarity measurements for other visual features are not necessarily consistent with human's perception. This paper addresses three critical issues regarding perceptually consistent texture analysis: (1) development of perceptual texture space, (2) assessment of...

Halftones are intended to produce the illusion of continuous images from binary output states, so the visibility of undesired halftone textures is an essential quality factor of halftone patterns. We propose a metric to predict the visibility of color halftone textures. The metric utilizes the human visual threshold function and contrast sensitivity functions (CSF) of luminance and chrominance....

2D color maps are often used to visually encode complex data characteristics such as heat or height. The comprehension of color maps in visualization is affected by the display (e.g., a monitor) and the perceptual abilities of the viewer. In this paper we present a novel method to measure a user's ability to distinguish colors of a two-dimensional color map on a given monitor. We show how to ad...

This paper presents a complete system for scanning the geometry and surface color of a 3D object and for displaying realistic images of the object from arbitrary viewpoints. A stereo system with active light produces several views of dense range and color data. The data is registered and a surface that approximates the data is constructed. The surface estimate can be fairly coarse, as the appea...