نتایج جستجو برای Decolorization

تعداد نتایج: 690  

2010
Ye Zhao, Zakiya Tamimi,

We propose a novel method for decolorizing a color image to grayscale, which preserves the chromatic contrast to be lost if using a simple luminance mapping. Unlike previous work, the conversion performs in spectral domain after applying Fourier transforms on luminance and chromatic channels, and the resultant intensity is recovered from an inverse transform. Frequency spectra inherently provid...

2016
Jie Chen, Xin Li, Xiuchang Zhu, Jin Wang,

The process of transforming a color image with three channels to a single channel grayscale image is called decolorization, which will unavoidably accompany with the information loss. In this paper, we propose a method to obtain a grayscale image which best preserves the global saliency of the color image. First, we convert the color image to the YUV color space, which separates the luminance a...

2012
V.Malini Devi,

The increasing use of synthetic dyes is alarming and their discharge as textile waste may cause substantial ecological damage. Biological decolorization of dye using microorganisms is an environmentally friendly and costcompetitive alternative to chemical methods. This study involves the application of laccase obtained from Pleurotus ostreatus, a common fungus, in decolorization and degradation...

2016
Jie Chen, Xin Li, Xiuchang Zhu, Jin Wang,

This paper presents a decolorization method using gradient and saliency as the maintained features in the conversion to preserve the local and global visual perception. First, we construct a linear parametric mapping function of RGB color channels. Then, we calculate the feature value of each pixel in the color image and the parameterized grayscale image, the feature value integrates the pixel ...

2010
Codruta Orniana Ancuti, Cosmin Ancuti, Chris Hermans, Philippe Bekaert,

In this paper we present a novel decolorization strategy, based on image fusion principles. We show that by defining proper inputs and weight maps, our fusion-based strategy can yield accurate decolorized images, in which the original discriminability and appearance of the color images are well preserved. Aside from the independent R,G,B channels, we also employ an additional input channel that...

2017
E. Samuel Hartikainen, Otto Miettinen, Mika A. Kähkönen,

Corresponding Author: Mika A. Kähkönen Department of Food and Environmental Sciences, Division of Microbiology and Biotechnology, P.O. Box 56, Biocenter 1, FI 00014 University of Helsinki, Finland Email: mika.kahkonen@helsinki.fi Abstract: To find out ability of fourteen basidiomycetes and four ascomycetes strains to grow in the presence of synthetic colour dyes and to degrade them, fungi were ...

2002
Warren S. Perkins,

Since discharge limits are becoming stricter for industrial wastes, textile manufacturers are searching for 3fficient and economical methods of pollution reduction. This is typical of :he situation facing the textile ndustry, especially in the area of :olor pollution emitted into the zarth's waterways. Ozone treatment ;o remove color from wastewater :ould be a solution to the problem of

2005
K. Barbusiński,

A novel modified Fenton process using heterogeneous catalyst (swarf) was developed to catalyze the oxidation reaction of azo dye Acid Red 18. It was found that swarf could be used to replace iron salts as a catalyst for the Fenton reaction. The examined continuous Fenton process proved to be very efficient for decolorization of simulated wastewater containing 100 mg/dm3 Acid Red 18. Performance...

Journal: :Journal of bioscience and bioengineering 2008
Kouichi Nozaki, Chee Hai Beh, Masahiro Mizuno, Tetsuhiro Isobe, Masahiro Shiroishi, Takahisa Kanda, Yoshihiko Amano,

The decolorization of industrial dyes was investigated using extracellular enzymes produced by 21 basidiomycetes, mainly edible mushrooms. Among the 27 dyes used in this study, nine were decolorized by over 40%. Most fungi decolorized Acid Orange 20, but they showed different specificities in the case of the other dyes. Determination of activity staining by native polyacrylamide gel electrophor...

2012
Yusuf Yavuz,

Introduction Effluents from the textile industry are not only colored but also contain large amounts of color, COD, BOD and dissolved solids. Textile industry is the one producing huge amount of wastewater. Due to stringent environmental regulations, treatment is mandatory before discharge the effluent. Conventional treatment methods include activated carbon adsorption, solvent extraction, chem...

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