Appearance of Gold, Silver and Copper Colors of Glossy Object Surface

Matsunaga, Tomohisa; Fukuda, Koichiro; Uchikawa, Keiji

doi:10.5057/ijae.ijae-d-16-00003

Cited by 14 publications

(15 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These values were determined by referring to the report in Ref. . The luminance of copper color was lower than that of other metallic colors because of the color gamut limit of the projector and the light absorption characteristics of material samples.…”

Section: Methodsmentioning

confidence: 99%

“…These chrominance values were selected from the copper color area reported in Ref. 10. The experimental stimuli were prepared at 100 cd/m 2 intervals with a luminance greater than 100 cd/m 2 .…”

Section: Experimental Stimulimentioning

confidence: 99%

“…Many studies discussed glossiness perception, but there are few studies that discussed the appearance of specific metallic color. A few studies have investigated gold color perception, and these studies conducted psychophysical experiments to analyze the appearance of gold such as chromatic region and reflection properties by using CG images as experimental stimuli to manipulate the surface properties. The reason for the use of CG images in these conventional studies is the difficulty to produce various metallic materials in the real world by controlling the properties of appearance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of metallic color perception using real‐world materials

Tanaka

Horiuchi

2018

Color Research & Application

View full text Add to dashboard Cite

Metallic colors have a unique appearance of glossiness with features such as highlights, contrast, and reflections on their surface, and therefore, metallic objects are very attractive to humans. Especially, gold, silver, and copper colors are familiar metals used as decorative materials, coins, and other furnishings. However, the mechanism and condition of metallic perception have not been fully investigated. There are a few studies for investigating metallic perception using rendered patches or images, but there is no study using real-world objects. In our previous study, we developed a simple representation technique that made real objects appear to be made of gold by projecting a solid color onto a target nonmetallic object. By using the representation technique, in this study, we have further investigated the perception of metallic appearance such as gold, silver, and copper using real-world materials, and analyzed the difference between these metallic perceptions. Our results indicate that the perception of the metallic object is different for gold, silver, and copper. Our new findings are as follows: the glitter required for the perception of gold and silver becomes an obstacle to the perception of copper; the metallic perception reveals that learning experience might be strongly affecting; and luminance adjustment is sensitive to the perception of metallic objects. K E Y W O R D Scolor appearance, material appearance, metallic color perception, metallic reproduction, projection mapping

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Experimental Stimulimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of metallic color perception using real‐world materials

Tanaka

Horiuchi

2018

Color Research & Application

View full text Add to dashboard Cite

show abstract

“…On the other hand, the correlation between the perception and appearance of metallic colors, such as gold and silver, is unexpectedly still under study and has been of interest in recent decades [1][2][3][4][5][6][7][8]. For instance, Okajima et al reported the importance of luminance distribution for metallic recognition [1].…”

Section: Introductionmentioning

confidence: 99%

“…For instance, Okajima et al reported the importance of luminance distribution for metallic recognition [1]. In addition to this, several factors for metallic recognition have been reported such as the specular/diffuse ratio [2,3], lighting condition [4,5], surface irregularity [6], shape recognition [7], observation area [8], etc. Although these research studies certainly indicate that the recognition of metallic colors is different from common colors, the prescribed method and index for quantification of metallic image based on perception is not defined, presumably due to the difficulties from said multidimensional recognition factors.…”

Section: Introductionmentioning

confidence: 99%

Index of Metallic Taste from Lightness Distribution of Real Images

Ishiwata

Tamura

Itami

2020

IJAE

View full text Add to dashboard Cite

As one of the high-value-added prints, embellished metallic prints via digital on-demand metallic foil printing have been of interest. Due to their eye-catching appearance, they are suitable for commercial prints, such as cosmetic packages and advertisements. Despite an expanding market, color management of the metallic prints still depends on visual judgment and the prescribed index of metallic taste has not yet been defined. Since the absence of an index has decreased productivity of people involved in this market, such an index based on perception has been needed. Thus, we suggest an index calculated from the lightness distribution of the real metallic images. The index possessed a linear correlation with perception and distinguished several appearances of the metallic images. It should be useful for several creative scenes in this market.

show abstract

Perception of gold materials by projecting a solid color on black materials

Tanaka

Horiuchi

2016

Color Research & Application

View full text Add to dashboard Cite

Gold gives a unique luxurious impression and therefore golden objects are often desired. Since gold is an expensive metal, due to its rarity, it is not feasible to produce objects made of gold at reasonable prices. In this study, we have developed a simple representation method that makes real objects appear to be made of gold using projection mapping technology. In recent years, this technology has been extensively explored, mainly in the field of entertainment. Most of these studies were focused on technologies where a target image was superimposed onto an object. Our method, unlike the conventional approach, does not project a target gold image but simply projects a solid color onto an object, thereby giving the perception that the object is made of gold. We have conducted two psychophysical experiments to substantiate our representation method, using stimuli having the same color. Our results indicate that objects were more easily perceived as golden objects when a solid color was projected onto black objects rather than white objects. Furthermore, a few samples were perceived as metals, even though they were actually paper or fabric. These results suggest that when superimposing a solid color onto an object, a change in material type is perceived along with the change of its color. Moreover, we analyzed the relationship between psychophysical evaluations on the perception of projected gold objects and the physical properties of the materials. The results show that the average and the standard deviation of reflectance generated by black objects can be considered factors that affect the perception of a gold‐like color. © 2016 Wiley Periodicals, Inc. Col Res Appl, 42, 522–530, 2017

show abstract

Appearance of Gold, Silver and Copper Colors of Glossy Object Surface

Cited by 14 publications

References 26 publications

Investigation of metallic color perception using real‐world materials

Investigation of metallic color perception using real‐world materials

Index of Metallic Taste from Lightness Distribution of Real Images

Perception of gold materials by projecting a solid color on black materials

Contact Info

Product

Resources

About