19 papers · ranked by Valyu relevance
Ayşegül Uçar
This paper presents a novel color face recognition algorithm by means of fusing color and local information. The proposed algorithm fuses the multiple features derived from different color spaces. Multiorientation and multiscale information relating to the color face features are extracted by applying Steerable Pyramid…
Shawn T. Schwartz, Whitney L.E. Tsai, Elizabeth A. Karan, Mark S. Juhn + 4 more
Advances in digital imaging and software tools have provided increasingly accessible datasets and methods for analyzing color evolution. Despite the variety of computational packages available, most rely on color classification before running analyses. Previous methods to characterize color limit the ability to analyze…
Richard M. Rimiru, Judy Gateri, Micheal W. Kimwele, Yilun Shang
Content-Based Image Retrieval (CBIR) is the cornerstone of today’s image retrieval systems. The most distinctive retrieval approach used, involves the submission of an image-based query whereby the system is used in the extraction of visual characteristics like the shape, color, and texture from the images. Examination…
Marco Buzzelli, Mathieu Hébert, Shoji Tominaga, Alain Tremeau
The angle-retaining color space (ARC) and the corresponding chromaticity diagram encode information following a cylindrical color model. Their main property is that angular distances in RGB are mapped into Euclidean distances in the ARC chromatic components, making the color space suitable for data representation in…
Muragul Muratbekova, Nuray Toganas, Ayan Igali, Maksat Shagyrov + 3 more
—Color representation is essential in computer vision and human-computer interaction. There are multiple color models available. The choice of a suitable color model is critical for various applications. This paper presents a review of color models and spaces, analyzing their theoretical foundations, computational…
Javier Martínez Martínez, Xurxo Rigueira, María Araújo, Eduardo Giráldez + 1 more
'Eduardo Giráldez' 'Antonio Recaman'] The traceability of granite blocks consists in identifying each block with a finite number of color bands which represent a numerical code. This code has to be read several times throughout the manufacturing process, but its accuracy is subject to human errors, leading to cause…
Djemel Ziou, Elvis Togban
To display an image, the color space in which the image is encoded is assumed to be known. Unfortunately, this assumption is rarely realistic. In this paper, we propose to identify the color space of a given color image using pixel embedding and the Gaussian process. Five color spaces are supported, namely Adobe RGB…
Ranjan Maitra
Color quantization represents an image using a fraction of its original number of colors while only minimally losing its visual quality. The k-means algorithm is commonly used in this context, but has mostly been applied in the machine-based RGB colorspace composed of the three primary colors. However, some recent…
Han-Lin Li, Shu-Cherng Fang, Bertrand M. T. Lin, Way Kuo
RGB and CYMK are two major coloring schemes currently available for light colors and pigment colors, respectively. Both systems use letter-based color codes that require a large range of values to represent different colors. The problem is that these two systems are hard to use for manipulating any operations involving…
Stephania Rodríguez Muiña, Rajendra Kumar Reddy Gajjala, Eduardo Fernández Martín, Francisco Javier del Campo
Color Space Transformations for Quantitative Analysis of Electrochemiluminescence Images Using Smartphone Cameras Authors: Stephania Rodríguez Muiña, Rajendra Kumar Reddy Gajjala, Eduardo Fernández Martín, Francisco Javier del Campo Quantitative imaging of luminescent signals, ranging from electrochemiluminescence…
Yasheng Li, Ningfang Liao, Yumei Li, Hongsong Li + 2 more
'Jesper Skottfelt'] The colorimetric conversion of wide-color-gamut cameras plays an important role in the field of wide-color-gamut displays. However, it is rather difficult for us to establish the conversion models with desired approximation accuracy in the case of wide color gamut. In this paper, we propose using an…
Ethan Chen, Jiwon Chang, Yuhao Zhu
Color programmers manipulate lights, materials, and the resulting colors from light-material interactions. Existing libraries for color programming provide only a thin layer of abstraction around matrix operations. Color programs are, thus, vulnerable to bugs arising from mathematically permissible but physically…
Matthias P. Christenson, S. Navid Mousavi, Sarah L. Heath, Rudy Behnia
Color vision represents a vital aspect of perception that ultimately enables a wide variety of species to thrive in the natural world. However, unified methods for constructing chromatic visual stimuli in a laboratory setting are lacking. Here, we present stimulus design methods and an accompanying programming package…
Isabelle Rosenthal, Shridhar Singh, Katherine Hermann, Dimitrios Pantazis + 1 more
The geometry that describes the relationship among colors is unsettled despite centuries of study. Here we present a new approach, using multivariate analyses of direct measurements of brain activity obtained with magnetoencephalography to reverse-engineer the geometry of the neural representation of color space. The…
Prasoon Ambalathankandy, Yafei Ou, Masayuki Ikebe
—Grayscale images are fundamental to many image processing applications like data compression, feature extraction, printing and tone mapping. However, some image information is lost when converting from color to grayscale. In this paper, we propose a light-weight and high-speed image decolorization method based on…
Jan Koenderink, Andrea van Doorn, Doris I. Braun, Karl R. Gegenfurtner
A complete empirical characterization of color discrimination in three dimensions has long remained out of reach. Classical studies, beginning with MacAdam’s ellipses, provided local measurements in restricted chromatic planes, but a spatially dense and internally consistent mapping of discrimination structure across…
Avinash Agarwal, Filipe de Jesus Colwell, Viviana Andrea Correa Galvis, Tom Hill + 2 more
Estimating pigment content in leafy vegetables via digital image analysis is a reliable method for real-time assessment of plant health status and nutritive value. However, the present leaf color analysis models developed using green-leafed plants do not perform reliably while analyzing images of anthocyanin-rich…
Avinash Agarwal, Filipe de Jesus Colwell, Viviana Andrea Correa Galvis, Tom R. Hill + 2 more
Digital color indices provide a reliable means for assessing plant health status by enabling real-time estimation of chlorophyll (Chl) content, and are thus adopted widely for crop monitoring. However, as all prevalent leaf color indices used for this purpose have been developed using green-leaved plants, they do not…
Giulio Ermanno Pibiri, Jason Fan, Rob Patro
The colored compacted de Bruijn graph (c-dBG) has become a fundamental tool used across several areas of genomics and pangenomics. For example, it has been widely adopted by methods that perform read mapping or alignment, abundance estimation, and subsequent downstream analyses. These applications essentially regard…