Recently, many 3D contents production tools using multiview system has been introduced: e.g., depth estimation, 3D reconstruction and so forth. However, there is color mismatch problem in multiview system and it can cause big differences for the final result. In this paper we propose a color correction method using 3D multi-view geometry. The propose method finds correspondences between source ...

The number of colors discernible by normal trichromats has been estimated for the idealized object-color solid. How well these estimates apply to natural scenes is an open question, as it is unknown how much their colors approach the theoretical limits. The aim of this work was to estimate the number of discernible colors based on a database of hyperspectral images of 50 natural scenes. The col...

In connection with the definition of color in such fields as computer graphics, television systems, and digital still photography, we encounter the two similar-looking, and often-confused, terms chromaticity and chrominance. In this article we illuminate the distinction between these terms. Color Color is the principal property of visible light by which a human observer can distinguish differen...

Color is one of the most important low-level features used in image analysis and retrieval. In this paper we introduce an algorithm for extracting compact color feature in the CIELAB color space. Our method is based on an ant colony clustering algorithm, which helps us develop a perceptually based image similarity metric. We propose a dominant color and area percentage model, which provides a v...

A novel approach for segmentation of grayscale images, which are color scene originally, is proposed. Many algorithms have been elaborated for a grayscale image segmentation. All those approaches have been discussed in a luminance space, because it has been considered that grayscale images do not have any color information. However, a luminance value has color information as a set of correspond...

This paper presents simple yet powerful improvements in color reduction field, targeting interactive high-quality applications. Here maximum distance clustering (MDC) is used to initialize K-means clustering, which eliminates the drawback of clustering-based color reduction that tends to ignore colors with a small number of pixels. Maximum distance clustering’s speed problem due to the problem ...

This paper presents a novel peer group filtering method, called the NPGF method, for impulse noise reduction. The main contributions of the proposed method are two-fold. First, we propose that the impulse noise detection is performed in the CIELab, instead of the RGB, color space to enhance noise detectability. Secondly, the proposed method employs two different-sized windows in determining the...

Rodney L. Heckaman Mark D. Fairchild Abstract — The effect of white-channel enhancement as implemented in the Texas Instrument DLPTM digital projector technology is evaluated theoretically using both the CIELAB and the CIECAM02 color appearance models and experimentally through psychophysical testing using real images. Both theory and test results confirm a compression of perceptual gamut in bo...

In the field of display technology, panels are mainly composed pixels three primary colors red, green and blue, which have basically same spectra in production batch due to consistency process. Thus, using commercially available color cameras measure coordinates is possible. However, actually different or even areas panel slightly different, will lead a certain error principle. this paper, we a...

Masato Sakurai Rodney L. Heckaman Stacey E. Casella Mark D. Fairchild Takehiro Nakatsue Yoshihide Shimpuku Abstract — The effect of varying the color gamut of an extended-gamut LCD on color appearance and preference was measured psychometrically in two experiments at each of two separate laboratories over a representative set of 10 images each. The first experiment measured the effect of color ...