Two light beams that are seen of the same colour and possibly having different spectra are said to be metameric. The colour of a light beam is based on the reading of severel photodetectors with different spectral responses and metamerism results when a set of photodetectors is unable to resolve two spectra. From a mathematical point of view, metamerism can be characterized in terms of the L, M...

The current global economy has increased international competition and the need to improve the quality of many manufactured products. Appearance measurements are used to determine the quality and acceptability of a variety of products from textiles to machine finishes. Since the manufacture and marketing of these products is international in scope, the methods, instruments, and standards for th...

The role of categorisation in visual search was studied in 3 colour search experiments where the target was or was not linearly separable from the distractors. The linear separability effect refers to the difficulty of searching for a target that falls between the distractors in CIE colour space (Bauer, Jolicoeur, & Cowan, 1996a). Observers performed nonlinearly separable searches where the tar...

Companion papers show why the CIE L*a*b* system of color coordinates is not optimal for use in desktop publishing (DTP) systems and how ATD remedies most of the problems of CIE L*a*b*. Since DTP deals primarily with the reproduction of images, DTP applications do not need to model human vision. They need only reproduce accurately in the image the reflective properties of the original. The eye d...

Traditionally the choices made by color separation are expressed as amounts of each of the available colorants to use for each of the reproducible colors. Halftoning then deals with the spatial distribution of colorants, which also results in the nature of their overprinting. However, having a colorant space as the way for color separation to communicate with halftoning gives access only to som...

Following an invitation by the Government, I conducted a visit to Italy from 30 September to 8 October 2012. During my 9-day visit, I visited Rome (CIE Ponte Galeria), Florence, Palermo, Trapani (CIE Milo), Bari (CIE Palese) and Castel Volturno. I met with Government representatives, civil society and international organisations, as well as many migrants themselves, including many who were in a...

The problem of selecting a good candidate method is a big issue in situational method engineering. We believe that the solution to this can be found not in the structure of a method itself but in the work to be done, the task to be performed by the method. We propose a method development life cycle with requirements, design and construction engineering stages. For the first, we propose the noti...

Color is the human sensory perception triggered by a portion of the electromagnetic spectrum commonly called light. Mechanisms for capturing and reproducing these perceptions can trace their origins to four events. First, Newton’s deduction that “white light” was a mixture of rays able to induce the sensation of color in a human. Some 140 years later Young offered a physiological explanation fo...

This paper describes an investigation undertaken to address the goal set by the CIE Technical committee TC804: "To investigate the state of adaptation of the visual system when comparing soft-copy images on self-luminous displays and hard copy images viewed under various ambient lighting conditions." A set of psychophysical experiments have been conducted for the determination of corresponding ...

The notion of a strong sufficient statistic was introduced in [N. Vereshchagin, Algorithmic Minimal Sufficient Statistic Revisited. Proc. 5th Conference on Computability in Europe, CiE 2009, LNCS 5635, pp. 478-487]. In this paper, we give a survey of fine properties of strong sufficient statistics and show that there are strings for which complexity of every strong sufficient statistic is much ...