Quaternion Locality-Constrained Coding for Color Face Hallucination
Liu, Licheng; Li, Shutao; Chen, C. L. Philip
AbstractRecently, the locality linear coding (LLC) has attracted more and more attentions in the areas of image processing and computer vision. However, the conventional LLC with real setting is just designed for the grayscale image. For the color image, it usually treats each color channel individually or encodes the monochrome image by concatenating all the color channels, which ignores the correlations among different channels. In this paper, we propose a quaternion-based locality-constrained coding (QLC) model for color face hallucination in the quaternion space. In QLC, the face images are represented as quaternion matrices. By transforming the channel images into an orthogonal feature space and encoding the coefficients in the quaternion domain, the proposed QLC is expected to learn the advantages of both quaternion algebra and locality coding scheme. Hence, the QLC cannot only expose the true topology of image patch manifold but also preserve the inherent correlations among different color channels. Experimental results demonstrated that our proposed QLC method achieved superior performance in color face hallucination compared with other state-of-the-art methods.
KeywordColor image processing face hallucination image super-resolution locality-constrained coding (LCC) quaternion algebra
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Indexed BySCI ; SSCI
WOS Research AreaAutomation & Control Systems ; Computer Science
WOS SubjectAutomation & Control Systems ; Computer Science, Artificial Intelligence ; Computer Science, Cybernetics
WOS IDWOS:000429247700011
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Cited Times [WOS]:11   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
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GB/T 7714
Liu, Licheng,Li, Shutao,Chen, C. L. Philip. Quaternion Locality-Constrained Coding for Color Face Hallucination[J]. IEEE TRANSACTIONS ON CYBERNETICS,2018,48(5):1474-1485.
APA Liu, Licheng,Li, Shutao,&Chen, C. L. Philip.(2018).Quaternion Locality-Constrained Coding for Color Face Hallucination.IEEE TRANSACTIONS ON CYBERNETICS,48(5),1474-1485.
MLA Liu, Licheng,et al."Quaternion Locality-Constrained Coding for Color Face Hallucination".IEEE TRANSACTIONS ON CYBERNETICS 48.5(2018):1474-1485.
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