NDLI: Local regression based colorization coding

Content Provider	IEEE Xplore Digital Library
Author	Oh, Paul Lee, Suk Ho Kang, Moon Gi
Copyright Year	2014
Description	Author affiliation: Dept. of Software Engineering, Dongseo University, 47 Jurye-ro, Sasang-Ku, Busan, South Korea (Lee, Suk Ho) \|\| Institute of BioMed-IT, Energy-IT and Smart-IT Technology (BEST), Yonsei University, 134 Shinchon, Seodaemun-Ku, Seoul, South Korea (Oh, Paul; Kang, Moon Gi)
Abstract	A new image coding technique for color image based on colorization method is proposed. In colorization based image coding, the encoder selects the colorization coefficients according to the basis made from the luminance channel. Then, in the decoder, the chrominance channels are reconstructed by utilizing the luminance channel and the colorization coefficients sent from the encoder. The main issue in colorization based coding is to extract colorization coefficients well such that the compression rate and the quality of the reconstructed color becomes good enough. In this paper, we use a local regression method to extract the correlated feature between the luminance channel and the chrominance channels. The local regions are obtained by performing an image segmentation on the luminance channel both in the encoder and the decoder. Then, in the decoder, the chrominance values in each local region are reconstructed via a local regression method. The use of the correlated features helps to colorize the image with more details. The experimental results show that the proposed algorithm performs better than JPEG and JPEG2000 in terms of the compression rate and the PSNR value.
Starting Page	153
Ending Page	159
File Size	1223741
Page Count	7
File Format	PDF
ISBN	9789897581335
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-05
Publisher Place	Portugal
Access Restriction	Subscribed
Rights Holder	SCITEPRESS
Subject Keyword	Colorization Image coding Image color analysis Transform coding Linear Regression Colorization Matrix Color Minimization Decoding Image reconstruction Color Image Compression
Content Type	Text
Resource Type	Article

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