Two criteria for selecting ink sets for six-color lithographic printing are discussed. The first is the volume, in CIELAB space, of an approximation of the gamut. The second is the number of pixels within a digital image (or images) whose colors are contained within the approximate gamut. In order to obtain a balance between accuracy and efficiency, the different steps in the process are priori...

Recently, significant interest has been attracted by the potential use of aluminum nanostructures as plasmonic color filters to be great alternatives to the commercial color filters based on dye films or pigments. These color filters offer potential applications in LCDs, LEDs, color printing, CMOS image sensors, and multispectral imaging. However, engineering the optical characteristics of thes...

Color science research, color image information processing research and development, as well as color printer product technology development, performed in relation to color image information processing, which is one of the core technologies of the color printing solutions at Oki Data, are described in three chapters of this paper. I should mention that this paper does not provide a detailed des...

© Toward Robust Categorical Color Perception Giordano Beretta, Nathan Moroney, John Ludd Recker HP Laboratories HPL-2009-146 color difference; language; color naming When implementing a software service for printing on commercial presses, it may be necessary to allow a casual user to modify the color rendering to remove a colorcast. In variable data printing, colored text on a colored backgroun...

This paper discusses possible extensions of error-diffusion dithering algorithms for color devices that give a more accurate reproduction of colors than previous algorithms. The main difference of the method presented here and others is that usually color channels are regarded separately, whereas we look at them together as one color value that is used to select the closest output color. This a...

This paper proposes a solution to the problem of finding the boundary of the gamut of a color printing device or of a color image. A surface triangulation of a set of points in the color space is computed using an alpha-shape, which is a generalization of a convex hull applicable also to nonconvex solids. The desired level of detail can be controlled by means of an alpha parameter. A method for...

It is important to understand which colors are attainable within the limits of specific printers and ink sets. If a printer is incapable of producing a desired color, no amount of color management can make it possible. In addition, there are some colors that can be displayed on an RGB monitor, but not printable using a CMYK device, and vice verse (CMYK representing the Cyan, Magenta, Yellow and...

Printing with custom inks is of interest both for artistic purposes and for printing security documents such as banknotes. However, in order to create designs with only a few custom inks, a general purpose high-quality gamut reduction technique is needed. Most existing gamut mapping techniques map an input gamut such as the gamut of a CRT display into the gamut of an output device such as a CMY...