Image Resolution Enhancement via Data-Driven Parametric Models in the Wavelet Space

被引:0
作者
Xin Li
机构
[1] West Virginia University,Lane Department of Computer Science and Electrical Engineering
来源
EURASIP Journal on Image and Video Processing | / 2007卷
关键词
Wavelet Coefficient; Texture Image; Prior Constraint; Fusion Strategy; Resolution Enhancement;
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摘要
We present a data-driven, project-based algorithm which enhances image resolution by extrapolating high-band wavelet coefficients. High-resolution images are reconstructed by alternating the projections onto two constraint sets: the observation constraint defined by the given low-resolution image and the prior constraint derived from the training data at the high resolution (HR). Two types of prior constraints are considered: spatially homogeneous constraint suitable for texture images and patch-based inhomogeneous one for generic images. A probabilistic fusion strategy is developed for combining reconstructed HR patches when overlapping (redundancy) is present. It is argued that objective fidelity measure is important to evaluate the performance of resolution enhancement techniques and the role of antialiasing filter should be properly addressed. Experimental results are reported to show that our projection-based approach can achieve both good subjective and objective performance especially for the class of texture images.
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共 63 条
[1]  
Andrews HC(1976)Digital interpolation of discrete images IEEE Transactions on Computers 25 196-202
[2]  
Patterson CL(1996)A simple edge-sensitive image interpolation filter Proceedings of IEEE International Conference on Image Processing (ICIP '96) 3 711-714
[3]  
Carrato S(1995)Subpixel edge localization and the interpolation of still images IEEE Transactions on Image Processing 4 285-295
[4]  
Ramponi G(1998)POCS based adaptive image magnification Proceedings of IEEE International Conference on Image Processing (ICIP '98) 3 203-207
[5]  
Marsi S(1996)Edge-directed interpolation Proceedings of IEEE International Conference on Image Processing (ICIP '96) 3 707-710
[6]  
Jensen K(2001)New edge-directed interpolation IEEE Transactions on Image Processing 10 1521-1527
[7]  
Anastassiou D(1990)Iterative methods for image deblurring Proceedings of the IEEE 78 856-883
[8]  
Ratakonda K(1995)Resolution enhancement of images using wavelet transform extrema extrapolation Proceedings of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP '95) 4 2379-2382
[9]  
Ahuja N(1999)Regularity-preserving image interpolation IEEE Transactions on Image Processing 8 1293-1297
[10]  
Allebach J(2000)Prediction of image detail Proceedings of IEEE International Conference on Image Processing (ICIP '00) 2 323-326