Spatial Quality Assessment of Pan-Sharpened High Resolution Satellite Imagery Based on an Automatically Estimated Edge Based Metric

Remote Sensing

Farzaneh Dadras Javan¹  Farhad Samadzadegan¹ 

[1] Department of Geomatics, Faculty of Engineering, University of Tehran, North Amir Abaad St., Tehran 14395-515, Iran; E-Mail:

关键词: fusion;    pan-sharpening;    high resolution satellite imagery;    quality as assessment;    edge-based;   

DOI  :  10.3390/rs5126539

来源: mdpi

【 摘 要 】

Most of the existing pan-sharpening quality assessment methods consider only the spectral quality and there are just few investigations, which concentrate on spatial characteristics. Spatial quality of pan-sharpened images is vital in elaborating the capability of object extraction, identification, or reconstruction, especially regarding man-made objects and their application for large scale mapping in urban areas. This paper presents an Edge based image Fusion Metric (EFM) for spatial quality evaluation of pan-sharpening in high resolution satellite imagery. Considering Modulation Transfer Function (MTF) as a precise measurement of edge response, MTFs of pan-sharpened images are assessed and compared to those obtained from the original multispectral or panchromatic images. Spatial quality assessment of pan-sharpening is done by comparison of MTF curves of the pan-sharpened and reference images. The capability of the proposed method is evaluated by quality assessment of two different residential and industrial urban areas of WorldView-2 pan-sharpened images. Obtained results clearly show the wide spatial discrepancy in quality of Pan-sharpened images, resulting from different fusion methods, and confirm the need for spatial quality assessment of fused products. The results also prove the capability of the proposed EFM as a powerful tool for evaluation and comparison of different image fusion techniques and products.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland