期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2014
卷号：3
期号：12
页码：9415-9421
出版社：IJECS
摘要：In this paper, Resolution enhancement (RE) model has one of the biggest disadvantage (drawback) is losinghigh frequency contents (which results in blurring). Discrete wavelet transform based (DWT) RE schemegenerates artifacts due to a DWT shift-variant property. For RE of the satellite images, here, new waveletdomain approach based on dual-tree complex wavelet transform (DT-CWT) and nonlocal means (NLM) isproposed. A satellite input image is decomposed by DT-CWT which is nearly shift invariant to obtain highfrequencysub bands. To interpolate the high- frequency sub bands and the low-resolution (LR) input images;in this paper the Lanczos interpolator is used. The high frequency sub bands are passed through an NLMfilter to cater for the artifacts generated by DT-CWT. To obtain a resolution-enhanced image we arecombining the filtered high- frequency sub bands and the LR input image by using inverse DT-CWT.Objective and subjective analyses show superiority of the new proposed technique over the conventional andstate-of-the-art RE techniques
