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Rizzi A.,University of Milan | Beretta G.B.,HPLabs | Eschbach R.,Xerox | Gille J.,Qualcomm | And 4 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

This year, at Electronic Imaging 2010, will be held for the second time, as part of the "Color Imaging XV: Displaying, Hardcopy, Processing, and Applications" conference, the special session entitled, "Dark Side of Color". This session aims at introducing innovative thinking, and discussion from experts working in a wide range of disciplines related with color, to foster ideas and stimulate about open issues and common misunderstanding in color science and technology. It is composed by a limited number of invited short presentations that are presented as summaries in this paper together with an overall description of the session point of view. Source


Krupinski E.A.,University of Arizona | Silverstein L.D.,VCD science Inc. | Hashmi S.F.,University of Arizona | Graham A.R.,University of Arizona | And 2 more authors.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2014

Color LCD use is increasing in medical imaging especially in applications like telepathology. Standardized methods for calibrating, characterizing and profiling color displays have not been created. We used a validated calibration, characterization and profiling protocol for color medical imaging applications to determine if it impacts performance accuracy and interpretation time. 250 breast biopsy whole slide image (WSI) areas (half malignant, half benign) were displayed to 6 pathologists. In one condition the calibration protocol was used and in the other the same display was un-calibrated. Receiver Operating Characteristic area under the curve (Az) with the calibrated display was 0.8570 and with the un-calibrated one was 0.8488 (p = 0.4112). For interpretation time, the mean with the calibrated display was 4.895 sec and with the un-calibrated display was 6.304 sec (p = 0.0460). There is an advantage diagnostically using a properly calibrated and color-managed display and a significant advantage for potentially improving workflow via reduced viewing times. © 2014 Springer International Publishing. Source


Silverstein L.D.,VCD science Inc.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

A common problem for all color displays, regardless of whether they are of the self-luminous or non-self-luminous type, is the synthesis of a full-color image from a limited set of primary colors. Several approaches to color synthesis have been employed for electronic displays. The most successful of these conform to the principles of additive color mixture and include optical superposition, spatial synthesis and temporal synthesis. In order to understand the principles of color generation in electronic display systems, as well as the relative strengths and weaknesses of synthesizing color in the space and time domains, I first consider the visual bases which allow such color synthesis to occur. Although basic approaches to color synthesis have served the evolution of display technology well up to recent times, I present the argument that the continued evolution of display technology toward higher display resolution and enhanced color quality has exposed the limitations of both spatial color synthesis and temporal color synthesis and raises questions as to whether either method for synthesizing color can alone fully satisfy the ever increasing demands on display image quality. Clearly, new approaches to color synthesis are needed to sustain the evolution of display technology, and I describe recent concepts with the potential for pushing the horizons of color display image quality and reducing the costs of future color displays. These include hybrid spatial-temporal color synthesis and 3D color synthesis as well as variants of these approaches. © 2009 Copyright SPIE - The International Society for Optical Engineering. Source


Roehrig H.,University of Arizona | Rehm K.,University of Arizona | Silverstein L.D.,VCD science Inc. | Dallas W.J.,University of Arizona | And 2 more authors.
Progress in Biomedical Optics and Imaging - Proceedings of SPIE | Year: 2010

Our laboratory has investigated the efficacy of a suite of color calibration and monitor profiling packages which employ a variety of color measurement sensors. Each of the methods computes gamma correction tables for the red, green and blue color channels of a monitor that attempt to: a) match a desired luminance range and tone reproduction curve; and b) maintain a target neutral point across the range of grey values. All of the methods examined here produce International Color Consortium (ICC) profiles that describe the color rendering capabilities of the monitor after calibration. Color profiles incorporate a transfer matrix that establishes the relationship between RGB driving levels and the International Commission on Illumination (CIE) XYZ (tristimulus) values of the resulting on-screen color; the matrix is developed by displaying color patches of known RGB values on the monitor and measuring the tristimulus values with a sensor. The number and chromatic distribution of color patches varies across methods and is usually not under user control. In this work we examine the effect of employing differing calibration and profiling methods on rendition of color images. A series of color patches encoded in sRGB color space were presented on the monitor using color-management software that utilized the ICC profile produced by each method. The patches were displayed on the calibrated monitor and measured with a Minolta CS200 colorimeter. Differences in intended and achieved luminance and chromaticity were computed using the CIE DE2000 color-difference metric, in which a value of ΔE = 1 is generally considered to be approximately one just noticeable difference (JND) in color. We observed between one and 17 JND's for individual colors, depending on calibration method and target. © 2010 Copyright SPIE - The International Society for Optical Engineering. Source


Silverstein L.D.,VCD science Inc. | Hashmi S.F.,University of Arizona | Lang K.,Lumita Inc. | Krupinski E.A.,University of Arizona | And 2 more authors.
Digest of Technical Papers - SID International Symposium | Year: 2011

A methodology and associated software modules for calibration, characterization and profiling of color LCDs for color-critical applications such as medical imaging is described. Supporting analyses reveal very high color reproduction accuracy as determined by CIE DE2000 color differences for 210 test colors uniformly distributed in CIE Lab color space. © 2011 SID. Source

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