Estimates were made of the efficiency with which color spaces code color information from images of natural scenes. Six spaces were tested, namely, CIE XYZ tristimulus space, and the spaces CIELUV, CIELAB, CIELAB and S-CIELAB after chromatic adaptation with CMCCAT2000, and the space CIECAM02. For each space, the information available and the information retrieved in color matching were calculat...

Abstract The perceived color interactions between geometrical objects presented on a computer screen were investigated. Colors of small patches with a colored background were used. Six observation colors and three interaction colors for each observed color were presented to ten observers, who performed a matching task. The object with a color assumed to interact with its background was compared...

Dichromatic vision is due to the loss of one of the three cone pigments: the L type in protanopes, the M type in deuteranopes, and the S type in tritanopes. In this paper, we show that the dichromatic vision can be simulated by applying transformation to image in CIE x, y chromaticity space. We base our work on the past experiments on unilateral color blind (color blind in one eye) people which...

*Departamento de Zoologia e Antropologia da Faculdade de Cie“ ncias da Universidade do Porto, Prac a GomesTeixeira, 4099-002 Porto, Portugal. CIIMAR, Rua dos Bragas 177, 4050-123 Porto, Portugal. Faculdade de Cie“ ncias da Sau¤ de da Universidade Fernando Pessoa, Rua Carlos da Maia 296, 4200-150 Porto, Portugal. ISPA, Rua Jardim doTabaco 34, 1149-041 Lisboa, Portugal. Corresponding author, e-ma...

In this paper we present an overview of colour spaces used in electrical engineering and image processing. We stress the importance of the perceptual, historical and applicational background that led to a colour space. The colour spaces presented are : RGB, opponent-colours spaces, phenomenal colour spaces, CMY, CMYK, TV colour spaces (YUV and YIQ), PhotoYCC, CIE XYZ, Lab and Luv colour spaces....

Problem greenwashingu, który polega, mówi?c w uproszczeniu, na wysuwaniu fa?szywych lub wprowadzaj?cych b??d twierdze? temat wp?ywu danego produktu przedsi?biorstwa ?rodowisko naturalne, jest coraz powszechniejszym zjawiskiem. Niniejszy artyku? stanowi prób? opisu rzeczywistej i potencjalnej odpowiedzi systemu prawa ten problem.

Uprawianie mariologii w konteks?cie to jeden z oryginalnych wymiaro?w wspo??czesnej polskiej teologii. Uzasadnieniem metodologicznym i teologicznym jest kontekst misterium Tro?jjedynego, a nie tylko zmieniaja?ca sie? kultura. Badanie obrazu Boga nauczaniu ma- riologicznym stanowi narze?dzie weryfikacji hipotez lub konkluzji teologicznych. Obraz Maryi zalez?y od Boga. Maryja jawi?a jako uczestni...