This paper focuses on the influence of colour on customers’ trust in websites in the fields of online banking and cryptocurrency trading. The literature reviews associated with the use of colour in web design shows that colour has a significant influence on customers’ interaction with websites. Considering that, this study aimed to determine the relationship between used colour and trust towards websites in the specific areas of online banking and cryptocurrency trading. The method used to explore these relationships was an online survey, based on Likert scale. The survey inquired data about respondents, such as gender, age, level of education and their use of online banking and cryptocurrency trading. The main part of the survey was the one where the respondents were presented with website stimuli that differed in colour, and evaluated through grades on the Likert scale on given statements related to trust. To define to which extent, the chosen colour palette along with some users’ general characteristics impacts the perception toward trust of presented websites, Kruskal–Wallis one-way analysis of variance and Mann–Whitney U test was conducted. The results indicated that there is a difference in respondents’ trust towards websites in the fields of online banking and cryptocurrency trading depending on the colour used as the dominant in website design. Statistical significance was partly reached to their age and gender but not to their level of education. Overall, the study showed that when designing websites in the fields of online banking and cryptocurrency trading, choosing colour palettes that are needed to be trustworthy to the targeted audience is the issue that should be addressed with attention.

Quality control of digital photos is evolving rapidly every day. Procedures and methods of measurement are changing. Cameras on mobile phones are currently in focus because they are largely replacing the cameras used so far. Based on the standards for the control of photos on mobile phones, in this paper one of the essential quality attributes was chosen to be tested, which is the sharpness of the photos. For the purposes of the experiment, five commercially available mobile phones with different rear camera characteristics were selected. Two standard test cards with different contrast ratios were used. The tests were carried out under appropriate laboratory conditions. Sharpness is analaziry via MTF50 value as measured in Imatest software. Based on the results, it is concluded that the contrast of the test chart affects the measured value, therefore it is important to strictly define the conditions of measurement and the used test card when analyzing this attribute.

Hromatska aberacija je optički defekt koji uzrokuje da se svetlosni zraci različitih talasnih dužina fokusiraju na različite tačke duž optičke ose sočiva. Manifestuje se kao traka jedne boje na prelazima okvira oko kontrastnih ivica na fotografiji. Postoje dve vrste hromatskih aberacija: longitudinalne i transverzalne. Transverzalna hromatska aberacija je ivica jedne boje koja se javlja zato što se uvećanje slike razlikuje u zavisnosti od talasne dužine. Ima tendenciju da bude daleko vidljivija od longitudinalne. Cilj ovog istraživanja je da se ispita uticaj žižne daljine na pojavu transverzalne hromatske aberacije. Za potrebe eksperimenta korišćena je jedna kamera bez ogledala (Sony Alpha A1), dok su objektivi bili varijabilni. Izabrana su dva objektiva, zum (Sony 24-70mm f2.8 GM) i telefoto (Tamron 70-180 f2.8) kako bi se proverio uticaj žižne daljine na pojavu hromatske aberacije.

Chromatic aberration is an optical defect that causes light rays of different wavelengths to focus at different points along the optical axis of the lens. It is manifested as band of one color at frame transitions around contrasting edges in the photo. There are two types of chromatic aberration: longitudinal and lateral. Lateral chromatic aberration is the color fringing that occurs because the magnification of the image differs with wavelength. It tends to be far more visible than longitudinal. The aim of this research is to examine the influence of depth of field on the appearance of lateral chromatic aberration. For the purposes of the experiment, we used one mirrorless camera (Sony a1), while the lenses were variable. We used Sigma 85mm f/1.4 DG DN and Sigma 40mm f/1.4 to check which type of lens shows the most chromatic aberration and how much the change in f-number affects its appearance.