Color memory matching in normal and red-green anomalous trichromat subjects

Prez-Carpinell, J.; Camps, Vicente J.; Sáiz, Dolores de Fez; Castro, José

doi:10.1002/1520-6378(200104)26:2<158::aid-col1007>3.0.co;2-6

Cited by 9 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Until now, research on the memory colours of real objects has been limited to the determination of the chromaticity shift with respect to object colours under a natural illumination 2–4, 6, 7, 13, 28. Bodrogi and Tarczali10, 11 and Sanders5 established, respectively, constant domains and tolerances for the memory colours of each of the objects they considered.…”

Section: Introductionmentioning

confidence: 99%

Colour appearance rating of familiar real objects

Smet¹,

Ryckaert²,

Pointer³

et al. 2011

Color Research & Application

View full text Add to dashboard Cite

The determination of the long-term memory colours of objects has been the subject of investigation for many years. Colour acceptance boundaries have been determined from the visual assessments of objects under variable illumination or by presenting manipulated images of objects on a calibrated computer display. However, a systematic and quantitative rating of the colour of real objects with respect to memory colour is not available at this moment. In this article, nine familiar real objects with colours distributed around the hue circle were positioned in a specially designed LED illumination box. For each object, approximately hundred real illumination spectra were synthesized in a random order keeping the luminance of the object approximately constant. Observers were asked to rate, on a five-point scale, the similarity of the perceived object colour to their idea of what the object looked like in reality. By avoiding specular reflections, the observer was unable to identify any clues as to the colour of the illumination. For each object, similarity ratings showed a good intraobserver and interobserver agreement. The ratings of all the observers were pooled and successfully modeled in IPT colour space by a bivariate Gaussian distribution. It was found that the chromaticity corresponding to the highest rating tended to be shifted toward higher chroma in comparison with the chromaticity calculated under D65 illumination. The bivariate distributions could be very useful in applications where the quantitative evaluation of the colour appearance of an object stimulus is required, such as in the evaluation of the colour rendering capabilities of a light source.

show abstract

Section: Introductionmentioning

confidence: 99%

Colour appearance rating of familiar real objects

Smet¹,

Ryckaert²,

Pointer³

et al. 2011

Color Research & Application

View full text Add to dashboard Cite

show abstract

“…Because the subjects were asked to identify the color based on memory, we do not know if the same results would occur if they were viewing the actual display at the intersection. The percentage of subjects identifying the figure as green could be higher because the pedestrian display would be in its actual environment and that might reinforce the misnaming; however, previous studies on color discrimination and memory reported that color discrimination was better for both CVN and anomalous trichromats when subjects discriminated colors simultaneously relative to using a memorized reference 10–14 . It is possible that in the actual environment, the CVDs may notice that the green signal light and the pedestrian white display were slightly different by comparing the actual lights successively, and because the lights appear slightly different, they may name the pedestrian light correctly as white.…”

Section: Discussionmentioning

confidence: 99%

Color vision defectives' experience: When white is green

Almustanyir

Hovis

2020

Color Research & Application

View full text Add to dashboard Cite

Despite having difficulties in discriminating colors, individuals with a congenital color vision defect (CVD) sometimes identify colors correctly. One explanation for their correct use of the color name could be the context in which the color is used. In North America, how context influences the use of color names can be illustrated using the pedestrian signal light, where the color of the light indicating that it is safe to cross is white. Sixty color vision normals (CVNs) and 68 CVD subjects were asked to identify the color of the man figure icon from memory. All of the CVNs identified the figure correctly as white, whereas 56% of the CVDs identified the color of the man-figure incorrectly, with 92% of the errors identifying the color as green and the remaining 8% as yellow. No one identified the figure as red. The data show one example of how context plays a role in how CVDs identify colors.

show abstract

“…Memory color tends to appear with higher brightness and saturation than the actual color [20][21][22]. In particular, the main feature of memory color is that its chroma/saturation is higher than that of the actual color [23,24]. Previous studies showed that the image quality preference increased when the saturation was adjusted to make it close to the memory color [25,26].…”

Section: Image Quality and Memory Colormentioning

confidence: 99%

The characteristic of image quality perception of elderly group: according to the comparison with adult group

Park

2018

Journal of Information Display

View full text Add to dashboard Cite

This study examined the image quality preference of the elderly group. The subjects were divided into adult group and elderly group based on their age, and subjective image quality evaluation was performed. In result, two significant differences were found according to the age group. First, the elderly group evaluates image quality based on sensory stimulation (sharp, clean), which involves less complicated cognitive processes compared with the adult group. Next, the degree of image quality preference of the elderly group was not significantly influenced by decrease and increase of brightness and saturation compared to adult group. Notably, when brightness increased significantly, the tendency of image quality preference of elderly group remained high unlike the adult group. This confirmed that it is necessary to increase the brightness of the image in order to satisfy the elderly group's image quality preference at a high level compared with the adult group.

show abstract

Color memory matching in normal and red-green anomalous trichromat subjects

Cited by 9 publications

References 25 publications

Colour appearance rating of familiar real objects

Colour appearance rating of familiar real objects

Color vision defectives' experience: When white is green

The characteristic of image quality perception of elderly group: according to the comparison with adult group

Contact Info

Product

Resources

About