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Salient region preservation for image deformation

[+] Author Affiliations
Yong Zhang

Sun Yat-Sen University, School of Information Science and Technology, Guangzhou 510275, China

Jianhuang Lai

Sun Yat-Sen University, School of Information Science and Technology, Guangzhou 510275, China

Pong C. Yuen

Hong Kong Baptist University, Department of Computer Science, Hong Kong 852, China

Xiaohua Xie

Chinese Academy of Sciences, Shenzhen Institute of Advanced Technology, Shenzhen 518055, China

J. Electron. Imaging. 23(6), 063012 (Dec 08, 2014). doi:10.1117/1.JEI.23.6.063012
History: Received January 22, 2014; Accepted November 4, 2014
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Abstract.  We present an interactive image deformation method which preserves the local shapes of salient objects in the concerned image during the deformation. The proposed method falls into the moving least squares (MLS) framework, but notably differs from the original MLS deformation method. First, a saliency-related distance is developed to replace the original Euclidean distance in the weight definition. Second, the original affine matrix is decomposed into a single rotation matrix and a symmetric matrix by using a singular value decomposition, then the free parameters of these matrices are interpolated according to the saliency information. Furthermore, for the line-based MLS deformation, the closed-form solution of weight cannot be found directly when using the proposed saliency-based distance. To address this problem, we propose a method using an exponential transformation to regulate the weight where the regulation factor is also correlated to saliency information. All these revisions lead a saliency-sensitive mapping which creates a deformation change in the nonvital parts of image while preserving the local shapes of salient parts. Experimental results show that the proposed deformation outperforms the original MLS deformation in terms of visual performance.

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© 2014 SPIE and IS&T

Topics

Distortion ; Matrices

Citation

Yong Zhang ; Jianhuang Lai ; Pong C. Yuen and Xiaohua Xie
"Salient region preservation for image deformation", J. Electron. Imaging. 23(6), 063012 (Dec 08, 2014). ; http://dx.doi.org/10.1117/1.JEI.23.6.063012


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