Zong-yue WANG, Qi-ming XIA, Guo-rong CAI, et al. Image restoration based on adaptive group images sparse regularization[J]. Optics and precision engineering, 2019, 27(12): 2713-2721.
DOI:
Zong-yue WANG, Qi-ming XIA, Guo-rong CAI, et al. Image restoration based on adaptive group images sparse regularization[J]. Optics and precision engineering, 2019, 27(12): 2713-2721. DOI: 10.3788/OPE.20192712.2713.
Image restoration based on adaptive group images sparse regularization
The sparse regularized image restoration method based on animage group adopts the adaptive structure group dictionary to replace the traditional learning dictionary based on the entireimage block.However
because some parameters in the algorithm have not been optimized
the complexity of the algorithm remains relatively high.Therefore
this study proposed a sparse regularization image restoration method based on an adaptive image group in terms of roughness.First
global and local image roughnesses were calculated.Then
the number of self-adaptive regularization iterations was calculated according to the global roughness
and the number of samples required for learning the dictionary was adjusted based on the local roughness.Finally
the adaptive parameters were applied to the process of sparse regularization image restoration based on an image group.The method proposed in this study was applied to a case involving image restoration of text removal for images with different degrees of smoothness. The experimental results show that the efficiency of image restoration can be greatly improved when a similar restoration effect is guaranteed
particularly in relatively smooth images
where the speed-up ratio can reach nearly 30 times.
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