Low Bit-Rate Compression Image Restoration through Subspace Joint Regression Learning

Zongliang GAN  

IEICE TRANSACTIONS on Information and Systems   Vol.E101-D    No.10    pp.2539-2542
Publication Date: 2018/10/01
Publicized: 2018/06/28
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2017EDL8278
Type of Manuscript: LETTER
Category: Image Processing and Video Processing
compression image restoration,  subspace regression learning,  non-local means denoising,  extreme support vector regression,  

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In this letter, an effective low bit-rate image restoration method is proposed, in which image denoising and subspace regression learning are combined. The proposed framework has two parts: image main structure estimation by classical NLM denoising and texture component prediction by subspace joint regression learning. The local regression function are learned from denoised patch to original patch in each subspace, where the corresponding compression image patches are employed to generate anchoring points by the dictionary learning approach. Moreover, we extent Extreme Support Vector Regression (ESVR) as multi-variable nonlinear regression to get more robustness results. Experimental results demonstrate the proposed method achieves favorable performance compared with other leading methods.