In this study, we investigated the computer colour matching (CCM) of cotton fabrics dyed with reactive dye using the octane-assisted reverse micellar approach. The aim of this study is to evaluate the colour quality and compare the accuracy between CCM forecasting and simulated dyeing produced by conventional water-based dyeing and octane-assisted reverse micellar dyeing. First, the calibration...

To speed the development of novel camera architectures we proposed a method, L (Local, Linear and Learned), that automatically creates an optimized image processing pipeline. The L method assigns each sensor pixel into one of 400 classes, and applies class-dependent local linear transforms that map the sensor data from a pixel and its neighbors into the target output (e.g., CIE XYZ rendered und...

Individual differences in the temporal dynamics of the haemodynamic response can reflect cortical excitation and can reveal underlying cortical physiology. Here, we show differences in the shape of the haemodynamic response that are dependent on stimulus parameters. Two sets of visual stimuli were used varying in parameters that are known to manipulate the haemodynamic response in the visual co...

Observing colour robustly in images captured with off-theshelf cameras can be a challenge. Particularly if the observation is conducted over a long time, while encountering light changes. Factors playing into using this colour information directly for quantitative reasoning: unknown processing in the camera’s firm ware, unpredictable variations in illumination conditions, and colour descriptors...

The Center of Immunoassay of Cuba (CIE) has been dedicated for years to develop the SUMA (Ultra Micro Analytical System) technology, applied in preand post-natal screening programs, epidemiological surveillance and certification of blood, organs and placenta. CIE has developed and updated the quality control systems based on clinical laboratory theoretical background of this field, to guarantee...

In this paper, we propose an approach to query a database where the user preferences can be bipolar (i.e., express both constraints and wishes about the desired result) and the data stored in the database can be uncertain. Query results are then completely ordered with respect to these bipolar preferences, giving priority to constraints over wishes. Furthermore, we consider user preferences exp...

Resumo. Com a rápida evolução dos sistemas computacionais, simulações numéricas baseadas em modelagem computacional têm alcançado soluções cada vez mais realistas. Ainda assim, o processo de simulação é complexo, exigindo grande capacidade computacional e produzindo muitos arquivos auxiliares com os resultados das simulações. Uma grande quantidade de arquivos, como os produzidos durante o proce...

Since the workshop held at the 23rd Session of the CIE in 1995, lighting quality has been established as one of the fundamental problems in lighting design, research, and education. The workshop at the 24th Session addressed a topic identified by delegates at the First CIE Symposium on Lighting Quality, held in 1998 [1]: the need to refine our definitions of luminous conditions to develop usefu...

In this paper we address the problem of appropriate modelling of shadows in color images. While previous works compared the different approaches regarding their model structure, a comparative study of color models has still missed. This paper attacks a continuous need for defining the appropriate color space for this main surveillance problem. We introduce a statistical and parametric shadow mo...

A colorimetric modeling technique is proposed to give a computational model associated with colorimetry so that the representation of color acquired from camera imaging is accurate and meaningful. First of all, the camera spectral responses are estimated and the colorimetric quality is evaluated to reveal the feasibility of this work. In the modeling process, we present a spectral matching meth...