Perceptual Evaluation of Color‐to‐Grayscale Image Conversions

Color images often have to be converted to grayscale for reproduction, artistic purposes, or for subsequent processing. Methods performing the conversion of color images to grayscale aim to retain as much information about the original color image as possible, while simultaneously producing perceptu...

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Vydáno v:	Computer graphics forum Ročník 27; číslo 7; s. 1745 - 1754
Hlavní autor:	Cadik, M
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Oxford, UK Blackwell Publishing Ltd 01.10.2008
Témata:	I.3.3 [Computer Graphics]: Picture/Image Generation–Display algorithms, viewing algorithms I.3.7 [Computer Graphics]: Three‐Dimensional Graphics and Realism–Color, shading, shadowing, and texture I.4.3 [Image Processing and Computer Vision]: Enhancement–Filtering J.4 [Social and Behavioral Sciences]: Psychology
ISSN:	0167-7055, 1467-8659
On-line přístup:	Získat plný text
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Popis
Shrnutí:	Color images often have to be converted to grayscale for reproduction, artistic purposes, or for subsequent processing. Methods performing the conversion of color images to grayscale aim to retain as much information about the original color image as possible, while simultaneously producing perceptually plausible grayscale results. Recently, many methods of conversion have been proposed, but their performance has not yet been assessed. Therefore, the strengths and weaknesses of color‐to‐grayscale conversions are not known. In this paper, we present the results of two subjective experiments in which a total of 24 color images were converted to grayscale using seven state‐of‐the‐art conversions and evaluated by 119 human subjects using a paired comparison paradigm. We surveyed nearly 20000 human responses and used them to evaluate the accuracy and preference of the color‐to‐grayscale conversions. To the best of our knowledge, the study presented in this paper is the first perceptual evaluation of color‐to‐grayscale conversions. Besides exposing the strengths and weaknesses of the researched methods, the aim of the study is to attain a deeper understanding of the examined field, which can accelerate the progress of color‐to‐grayscale conversion.
Bibliografie:	cadikm@fel.cvut.cz http://www.cgg.cvut.cz/~cadikm ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 content type line 23
ISSN:	0167-7055 1467-8659
DOI:	10.1111/j.1467-8659.2008.01319.x