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In four color printing, gray component replacement (GCR) is a method of replacing the achromatic component of a mixture of chromatic inks by a corresponding amount of the achromatic ink. Simple approaches to GCR lead to unacceptable color shifts. In this paper, the method using multiple processing steps is proposed. The novelty of the proposed method is augmentation of masking equations, which allows...
Display system calibration is of great significance to assure perceptual uniformity. Nevertheless, due to differences in technology and purpose, same colors do not represent precisely the same on different display systems. The goal of this paper is to verify this mismatch and quantify it, aiming at achieving a correlation between displays' technology, purpose and reproduction accuracy. Five modern...
Introduction of e-learning has allowed students to actively participate in research. The aim of this research was to involve students for investigative research and to find tolerance of color appearance on different monitors. Students were conducting research in order to become familiar with the content of subject. The wedge was generated and subjective judgment was made. The aim was to determine...
The aim of this research was to improve student's knowledge of colors and different parameters that influence its perception. Through research they were introduced to the different characteristics of the display that result in different gamut. The aim was to investigate the effect of background on perception of colorimetric differences.
In this paper we evaluate degradation of an image due to the implementation of a watermark in the frequency domain of the image. As a metric Peak Signal to Noise Ratio (PSNR) is used. The degradation is calculated for three different cases, the strength of the watermark implementation, the frequencies that are modified by the watermark implementation, and the length of the watermark. The watermark...
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