NDLI: Color to grayscale transform preserving natural order of hues

Content Provider	IEEE Xplore Digital Library
Author	Chengho Hsin Hoai-Nam Le Shaw-Jyh Shin
Copyright Year	2011
Description	Author affiliation: Department of Communications Engineering, Feng Chia University, Taichung, Taiwan (Chengho Hsin; Hoai-Nam Le; Shaw-Jyh Shin)
Abstract	Color-to-gray conversion in many applications requires preserving both the visual appearance and feature discrimination of color images. The existing methods are still need of improvement in these aspects. A two-stage color-to-gray transform algorithm is proposed in this paper. It produces a grayscale image that matches the color contrast and the lightness of a given input color imag1e. The first stage process is a functional mapping scheme based on the natural order of hues. The mapping is simple and fast, yet it preserves feature discrimination and appropriate color order of color images. The second stage of the proposed algorithm recovers the lightness of a color image through adjusting the local contrast of the first-stage output. It not only retains the visual appearance of the color image but also compensates the functional mapping for possible loss of color information. The proposed method could accurately convert various categories of color images to grayscale images, including natural images, computational images, and painting images. Experimental results show that our method produced perceptually accurate and preferred images when they were compared with other schemes.
Starting Page	1
Ending Page	6
File Size	3193356
Page Count	6
File Format	PDF
ISBN	9781457707537
ISSN	21556830
e-ISBN	9781457707520
DOI	10.1109/ICEEI.2011.6021794
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-17
Publisher Place	Indonesia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Visualization Color-to-gray conversion Image color analysis Image edge detection Color visual appearance Gray-scale Painting
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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