CMYK vs. RGB Color images are printed on paper by separating their colors into four component parts: cyan, magenta, yellow, and black ( CMYK ). Each of the colors in an image is created by assigning a percentage from 0–100 to each of the aforementioned colors (for example, a red color could be created from 0% cyan, 100% yellow, 100% magenta, and 0% black). The color image is then printed on a m...

A CMYK image is often viewed as a large amount of device-dependent data ready to be printed. In several circunstances, CMYK data needs to be compressed, but the conversion to and from device-independent spaces is imprecise at best. In this paper, with the goal of compressing CMYK images, color space transformations were studied. In order to have a practical importance we developed a a new trans...

Dr Trevor Laird, Managing Director and Founder of Scientific Update LLP, is an expert in organic process R&D and scale-up of chemical processes and has been an editor-in-chief of the American Chemical Society journal Organic Process Research and Development since its launch in 1996. With over 4 decades of involvement with the chemical and pharmceutical industry, Trevor has consulted for compani...

The main problem in colour management in prepress department is lack of availability of literature on colour management and knowledge gap between prepress department and press department. So a digital test from has been created by Adobe Photoshop to analyse the ICC profile and to create a new profile and this analysed data is used to study about various grey scale of RGB and CMYK images. That h...

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...

CMYK Printers use CMYK – representing the colors, cyan, magenta, yellow and black inks, when printing 4-color process work. These are called subtractive colors, as combining them all gives the color black. Subtracting one or more of these colors will yield any other color. When combined in various percentages, these four inks will create an entire spectrum of colors, including those used in col...

This paper describes a method for constructing a lookup table relating a three-dimensional CMY coordinate system to CMYK colorant amounts in a way that maximizes the utilization of the printer gamut volume. The method is based on an assumption, satisfied by most printers, that adding a black colorant to any combination of CMY colorants does not result in a color with more chroma. Therefore the ...

The color images are used widely as a cover in hiding of the information. Since variety applications image there several models image. Most consist three layers. nature mode plays main role determining robustness and security algorithm.
 objective this paper tests layers, components, images, to figure out which layer each model is best (less affected) use hide information within process. e...