The intensity of the simultaneous contrast effect depending on the change of background lightness

Bradić

et al. 2018

Teh. glas. (Online)

This research presents the results of the appearance of chromatic effect of crispening on a designer solution in which the primary stimuli are made in the purple color with the values of 55% RTV and 65% RTV and backgrounds are made in the green-blue color, and their variations are designed in the values of 25% RTV, 50% RTV, 75% RTV and 100% RTV that are placed around the primary stimuli. The test subjects (n=10) that took part in the research had the task to equalize the test primary stimuli with the referential stimuli on a computer screen with the help of the technique of simultaneous binocular harmonization. The strength of the crispening effect was defined and shown in the CIEDE00 system. The conclusion of the conducted tests indicates that the intensity of crispening was stronger on the test primary stimuli 65% RTV, where the differences in the perception of color were more significant.

Section: Figure 2 Example Of the Crispening Effectmentioning

confidence: 99%

Section: Figure 2 Example Of the Crispening Effectmentioning

confidence: 99%

Color Perception of the Observer with the Manifestation of the Chromatic Effect of Crispening

Bradić

et al. 2018

Teh. glas. (Online)

“…More recently, the simultaneous contrast effect on the shift of perceived lightness of the observer on achromatic samples, depending on the change of the printing substrate, was researched, 23 while in the work of Hajdek et al, the influence of the simultaneous contrast effect depending on the change of background lightness in the reproduction (print) was studied using a color atlas. 24,25 In work Hajdek et al, a comparison of the intensity of the simultaneous contrast effect on achromatic (monochromatic and desaturated) samples on the reproduction (print)-color atlas was carried out. 26 This article is a continuation of the research conducted by Hajdek et al, in which a shift of the perceived lightness of the observer during the manifestation of the simultaneous contrast effect was shown.…”

Section: Introductionmentioning

confidence: 99%

A shift of the perceptual attributes of color due to the manifestation of the simultaneous contrast effect on a display

Color Research & Application

Budimir

Matijević

2020

This research shows the effect of simultaneous contrast on a design solution that generates it, and it also shows how its manifestation affects the shift of perception attributes of the observer's color. In the conducted research, 55 subjects had to harmonize the primary stimuli from the reproduction obtained with the help of digital printing technology, with the primary stimuli presented on two computer screens. As a visual harmonization technique, simultaneous binocular harmonization was used. The primary stimuli were made achromatic, with a 50% Raster Tone value (RTV), and are surrounded by achromatic secondary stimuli whose values increase in steps from 10% RTV up to 100% RTV. A shift in the perceptual attributes of color has been shown with the help of the CIEDE2000 system. Using ANOVA with repeated‐measures and Fisher's post hoc analysis, statistically significant differences were found between the perceived means of shift in the ΔC00 chroma and ΔL00 lightness on defined samples on both computer screens, while in the case of the ΔH00 hue, no statistically significant differences were observed. The research also determined colorimetric differences in the ΔE00 color difference. Moreover, the student's t test was used to determine that the effect is stronger when manifested on the Lenovo computer than on the Asus computer screen (P < .05).

“…The research presented in this paper is a continuation of a previous research carried out by Hajdek et al in which the strength of the induction effect is researched in dependence of the different lightness of secondary stimuli in the achromatic design solution due to which the effect appears. The evaluation of the effect was carried out in relation to the reproductions made in the offset printing technique [26].…”

Section: Introductionmentioning

confidence: 99%

Perceived Differences of Lightness Deviation during the Appearance of Simultaneous Contrast Effect in Printing Process

Budimir

2020

Teh. vjesn.

This paper shows the research data of psychophysical visual effect of simultaneous contrast when changing RTV of background lightness in the printing process. An experimental research on graphic reproductions made in the offset printing technique with specifically constructed design solutions that cause the above mentioned effect was carried out. Samples were designed as ten various lightness variances of background, with a range from 10% RTV to 100% RTV, on which there are primary stimuli with value of 50% RTV. The visual experiment was performed by using simultaneous binocular harmonization technique, and it involved 20 respondents. The respondents were tasked with harmonizing the primary stimuli from the test reproduction in relation to the referential one, so that they were to be perceived as equal on both reproductions. For statistical data processing, one-way repeated measurements ANOVA was used, which found statistically consequential differences among means of deviations in perceived lightness of primary stimuli. Post-hoc analysis by Fisher shows pairs that are reciprocally different (p < 0,05). The obtained results clearly indicate the regularities of the appearance of simultaneous contrast effect on printed medium, all with the aim of creating a model for predicting it and finding a conceptual design solution in which the effect is pronounced the least.