Expanded Q4 quality assessment for pan-sharpened multispectral image

Zhongwu Wang; Zhongming Zhao

doi:10.1117/12.813122

10 November 2008 Expanded Q4 quality assessment for pan-sharpened multispectral image

Zhongwu Wang, Zhongming Zhao

Proceedings Volume 7146, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses; 71460V (2008) https://doi.org/10.1117/12.813122
Event: Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 2008, Guangzhou, China

Abstract

In this paper, we took into account both the spectral information and the spatial information and estimated how well the needed information contained within the multispectral (MS) and panchromatic (PAN) images was represented by the pan-sharpened image. Based on that, we proposed a new quality index which could be seen as an expanded index of the global quality measurement Q4. In our method, we first measured the spectral information preserving quality between the MS image and the fusion result. Then, we constructed a virtual spatial detail image considering the spatial resolution ratio between the source MS image and the PAN image, and also extracted the detail image contained in the merged image using the same technology, followed by a spatial information preserving quality index calculated from these two detail images. At last, we integrated the two indices by means of weighted addition determined by fusion model. To illustrate the superiority of this new index, we took experiments on two pairs of ZY-2 PAN and ASTER MS (1 2 3 bands) remote sensing imageries, and adopted the tradeoff FIHS fusion method in which the tradeoff parameter was set to different values standing for different fusion models. After using the proposed index to assess the quality of fusion, we think that the new index is compliant with subjective evaluations and could therefore be used to compare different image fusion or to find the best parameters for a given fusion model. Finally, we gave an experiential weight parameter of the quality index while assessing the tradeoff FIHS fusion with images from these two sensors by the author's experiments.

Citation Download Citation

Zhongwu Wang and Zhongming Zhao "Expanded Q4 quality assessment for pan-sharpened multispectral image", Proc. SPIE 7146, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses, 71460V (10 November 2008); https://doi.org/10.1117/12.813122

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