Color correction describes the transformation process between device RGB values and CIEXYZ or CIELAB values. This mapping is in general not unique, because the spectral sensitivities of most of the devices do not satisfy the Luther condition and the acquisition and viewing light sources have a different power spectrum. Therefore, there exists a set of colors with different reflectance spectra w...

We optimized the emission spectrum of a quantum dot (QD) backlight and achieved ~140% color gamut in CIE 1976 color space. The QD-based LCD not only exhibits a wide color gamut but also improves the optical efficiency. Our systematic photometric analysis provides useful guidelines to further optimize the QD backlight design.

In this paper we present a novel method to calculate the gamut boundary of a color printing device using a sparse number of measured values. This method belongs to the SMGBD (Segment Maxima Gamut Boundary Descriptor ) family. At first, we construct an inverse printer model based on a set of printed color patches. This model allows us to find the colorant values that have to be sent to the print...

Color gamut and static and dynamic color shifts of a multi-domain in-plane-switching liquid crystal display (IPS LCD) are calculated quantitatively using RGB (red, green, and blue) light-emitting diodes (LEDs) and cold-cathode fluorescent lamp (CCFL) backlights. Simulation results indicate that the LED backlight exhibits a wider color gamut, better angular color uniformity, and 2-4X smaller sta...

A multi–resolution, full–colour spatial gamut mapping algorithm (GMA) is proposed in this paper. Its aim is to maintain as much of an original image’s overall, and in particular spatial, information as possible within the limits of a reproduction medium’s gamut. First, the original image is decomposed into different spatial frequency bands. Second, lightness compression and initial gamut mappin...

bstract. We introduce a novel workflow that will hopefully open ew directions of processing and improvement in image reproducion. Existing gamut mapping algorithms can be classified into two asic categories: image-independent algorithms and imageependent algorithms. The latter algorithms produce better reprouction; however, because they are time consuming and mathematially complex, the image-in...

While wide color gamut (WCG) capabilities are a key element of emerging display and projection technologies, at present most image content is recorded using standards such as DCI-P3 for cinema or BT.709 for TV that have a reduced color gamut. Therefore, there is a need for gamut extension methods that process regular content and allow to appreciate the full color potential of new displays, impr...

Liquid-crystal-displays (LCDs) and cathode-ray-tubes (CRTs) are compared with regard to color-calibration and color gamut. Applicability of common display calibration models to LCDs and CRTs is experimentally tested. Color-calibration accuracy, ease of calibration, and achievable color gamut are evaluated for the displays. An offset, matrix, and tone-response correction model is found to be sui...

The CIE color difference formula was developed using simple color patches in controlled viewing conditions. They are not suitable for predicting color differences of spatially complex images. In order to quantify color differences between the original and reproduced images, we present an image difference algorithm based on image contents. This formula uses the Contrast Sensitivity Functions (CS...

Alain Pagani Didier Stricker Abstract — A major issue when setting up multi-projector tiled displays is the spatial non-uniformity of the color throughout the display’s area. Indeed, the chromatic properties do not only vary between two different projectors, but also between different spatial locations inside the displaying area of one single projector. A new method for calibrating the colors o...