Title :
Image and Video Restorations via Nonlocal Kernel Regression
Author :
Haichao Zhang ; Jianchao Yang ; Yanning Zhang ; Huang, Thomas S.
Author_Institution :
Sch. of Comput. Sci., Northwestern Polytech. Univ., Xi´an, China
Abstract :
A nonlocal kernel regression (NL-KR) model is presented in this paper for various image and video restoration tasks. The proposed method exploits both the nonlocal self-similarity and local structural regularity properties in natural images. The nonlocal self-similarity is based on the observation that image patches tend to repeat themselves in natural images and videos, and the local structural regularity observes that image patches have regular structures where accurate estimation of pixel values via regression is possible. By unifying both properties explicitly, the proposed NL-KR framework is more robust in image estimation, and the algorithm is applicable to various image and video restoration tasks. In this paper, we apply the proposed model to image and video denoising, deblurring, and superresolution reconstruction. Extensive experimental results on both single images and realistic video sequences demonstrate that the proposed framework performs favorably with previous works both qualitatively and quantitatively.
Keywords :
image denoising; image resolution; image restoration; image sequences; realistic images; regression analysis; video signal processing; NL-KR model; image deblurring; image denoising; image estimation; image pixel values; image restoration; image superresolution reconstruction; local structural regularity properties; natural image patches; natural videos; nonlocal kernel regression model; nonlocal self-similarity properties; realistic video sequences; video deblurring; video denoising; video restoration; video superresolution reconstruction; Estimation; Image restoration; Kernel; Noise reduction; Redundancy; Robustness; Vectors; Deblurring; denoising; local structural regression; nonlocal self-similarity; restoration; superresolution (SR); Algorithms; Artificial Intelligence; Data Interpretation, Statistical; Image Interpretation, Computer-Assisted; Pattern Recognition, Automated; Photography; Regression Analysis; Subtraction Technique; Video Recording;
Journal_Title :
Cybernetics, IEEE Transactions on
DOI :
10.1109/TSMCB.2012.2222375