Using Discrete Wavelet Transform to increase the Accuracy of Hyper Spectral and High Resolution Images Fusion

Publish Year: 1398
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_JRORS-2-1_003

تاریخ نمایه سازی: 12 خرداد 1399

Abstract:

In optical remote sensing, hyper-spectral (HS) image which contains color information is produced byhundreds of spectral bands. Because of the trade-off imposed by the physical constraint between spatialand spectral resolutions, the HS image has poor spatial resolution. On the contrary, the panchromatic(PAN) images have high spatial resolution but no color information. Image fusion can combine thegeometric detail of PAN image and the color information of the HS image to produce a high-resolutionHS image. The aim of this study is the fusion of Hyperion and OrbView-3 PAN images based on DiscreteWavelet Transform (DWT). Firstly, the preprocessing methods were applied on Hyperion and OrbView-3images and registration method based on nearest neighbor method were applied on two dataset. In order tofit images pixel size, the resampling operation was applied. PAN image was decomposed by DWT andthen fused by hyper spectral image with GST algorithm. DIV, CC, Q and RMSE accuracy assessmentmethods were used on final fused image to evaluate the results accuracy. The results showed that usingDWT based decomposition PAN image, preserve the spatial information during fusion rule. Also thistechnique gains high accuracy in term of spectral information of hyper spectral image.

Keywords:

Discrete Wavelet Transform (DWT) , Hyperion , OrbView-3 , Accuracy assessment

Authors

hasan Hasani Moghaddama

MSc of remote sensing and GIS, Kharazmi University

Ali Asghar Torahi

Assistant professor of remote sensing and GIS, Faculty of geography, Kharazmi University.

parviz Zeaiean Firooz Abadi

Associated professor of remote sensing and GIS, Faculty of Geography, Kharazmi University.