NDLI: Real-time digital zooming for mobile consumer cameras using directionally adaptive image interpolation and restoration

Content Provider	IEEE Xplore Digital Library
Author	Wonseok Kang Jaehwan Jeon Eunjung Chae Minkyu Park Joonki Paik
Copyright Year	2013
Description	Author affiliation: Grad. Sch. of Adv. Imaging Sci., Multimedia, & Film, Chung-Ang Univ., Seoul, South Korea (Wonseok Kang; Jaehwan Jeon; Eunjung Chae; Joonki Paik) \|\| Camera Module Lab., Samsung Electron., Suwon, South Korea (Minkyu Park)
Abstract	In this digest, we present a novel real-time digital zooming method based on directionally adaptive image interpolation and restoration. The proposed method first estimates an edge direction using steerable filters and performs weighted smoothing along the estimated edge direction. Bi-cubic and bi-linear interpolations are selectively used according to the estimated edge direction. Degradation and artifacts caused by interpolation are removed by employing a directionally adaptive truncated constrained least squares (TCLS) filter. The proposed digital zooming method followed by image restoration provides high-quality magnified images which are similar to the result of computationally intensive super-resolution algorithms. The proposed method can be applied to real-time image processing, and embedded in the form of the finite impulse response (FIR) filtering structure. It is suitable for digital zooming system of mobile phone cameras, tablet PCs, and digital camcorders.
Sponsorship	IEEE Consumer Electron. Soc.
Starting Page	294
Ending Page	295
File Size	623129
Page Count	2
File Format	PDF
ISBN	9781467313612
ISSN	21583994
e-ISBN	9781467313636
DOI	10.1109/ICCE.2013.6486900
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interpolation Finite impulse response filters Image edge detection Image restoration Real-time systems Smoothing methods PSNR
Content Type	Text
Resource Type	Article

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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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