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Scientific American, 2012
The author explores how an understanding of seven tactics used by animals to create colors may lead to the development of novel technologies. The author notes that scientists are beginning to have a fuller understanding of how highly-organized nanostructures in living organisms manipulate light, such as those responsible for colors in bird feathers ...
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The author explores how an understanding of seven tactics used by animals to create colors may lead to the development of novel technologies. The author notes that scientists are beginning to have a fuller understanding of how highly-organized nanostructures in living organisms manipulate light, such as those responsible for colors in bird feathers ...
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Possibilities of color with the use of natural coloring applied in natural fibers
ENSUS2023 - XI Encontro de Sustentabilidade em Projeto, 2023Chemical dyes applied to textiles in the textile processing stage bring serious damage to the environment and human beings involved in the processes. The use of natural dyes in place of chemicals brings benefits in the social and environmental spheres, since highly polluting toxic chemicals are not used in their processes. Despite the importance of its
Cristine Silva Santos +4 more
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Understanding Colors in Nature
Pigment Cell Research, 1988There are two ways in which white light is transformed into colored light by interaction with matter: absorption and scattering. Absorption transforms light into other forms of energy, whereas scattering redirects it. Reflection, refraction, and diffraction are not distinct from scattering but rather are manifestations of it.
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SPIE Proceedings, 2002
Color is a visible aspect of objects and lights, and as such is an objective characteristic of our phenomenal world. Correspondingly also objects and lights are objective, although their subjectivity cannot be disregarded since they belong to our phenomenal world. The distinction between perception and sensation deals with colors seen either in complex
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Color is a visible aspect of objects and lights, and as such is an objective characteristic of our phenomenal world. Correspondingly also objects and lights are objective, although their subjectivity cannot be disregarded since they belong to our phenomenal world. The distinction between perception and sensation deals with colors seen either in complex
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Automatic Natural Image Colorization
2020We introduce a technique to automatically colorize natural grayscale images that combines both local and global features. Automatic colorization is a hard problem of computer vision and usually requires user interactions such as human-labelled color scribbles or reference images to achieve proper results.
Tan-Bao Tran, Thai-Son Tran
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Natural color image segmentation
Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429), 2004A new method for natural color image segmentation using integrated features is proposed in this paper. Edges are first detected in term of the high phase congruency in the gray-level image. K-means cluster is used to label long edge lines based on the global color information to estimate roughly the distribution of objects in the image, while short ...
Jie Xu, Pengfei Shi
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A Colored Avocado Seed Extract as a Potential Natural Colorant
Journal of Food Science, 2011Abstract: There is an increasing consumer demand for and scientific interest in new natural colorants. Avocado ( Persea americana ) seed when crushed with water develops an orange color ( = 480 nm) in a time‐dependent manner.
Deepti, Dabas +3 more
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Color preference and perceived color naturalness of digital videos
SPIE Proceedings, 2006In this study, we examined the subjective attributes of color preference and perceived naturalness of digital videos when the chroma of the color content was varied. More specifically, the objectives were: (1) to determine how the scaling of color chroma affected the mean color preference rating and the mean naturalness rating across subjects and (2 ...
Chin Chye Koh +2 more
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2011
Electromagnetic waves can have many different wavelengths and frequencies in a range known as the electromagnetic spectrum, as illustrated in Fig. 1.1. Light is a narrow range of electromagnetic waves that the eye can detect. Different wavelengths of light produce different perceptions of color.
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Electromagnetic waves can have many different wavelengths and frequencies in a range known as the electromagnetic spectrum, as illustrated in Fig. 1.1. Light is a narrow range of electromagnetic waves that the eye can detect. Different wavelengths of light produce different perceptions of color.
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A natural norm for color processing
1997We show that the geometrical framework, in which color images are considered as surfaces, results in a meaningful operator for enhancing color images. The area functional, or “norm”, captures the way we would like the smoothing process to act on the different color channels while exploring the coupling between them.
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