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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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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 ...
Xu Jie, Shi Peng-fei
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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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Nature’s Palette: The Search for Natural Blue Colorants
Journal of Agricultural and Food Chemistry, 2014The food and beverage industry is seeking to broaden the palette of naturally derived colorants. Although considerable effort has been devoted to the search for new blue colorants in fruits and vegetables, less attention has been directed toward blue compounds from other sources such as bacteria and fungi.
Andrew G, Newsome +2 more
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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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Natural Food Pigments and Colorants
Current Opinion in Food Science, 2016The natural color of foods is due primarily to carotenoids, anthocyanins, betanin and chlorophylls, either as inherent food constituents or as food or feed additives. These compounds have drawn considerable attention in recent years, not because of their coloring properties, but due to their potential health-promoting effects.
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Color classification of natural color images
Color Research & Application, 1992AbstractThe present article describes a color classification method that partitions a color image into a set of uniform color regions. The input image data are first mapped from device coordinates into the CIE L*a*b* color space, an approximately uniform perceptual color space.
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