Varying weighted spatial quality assessment for high resolution satellite image pan-sharpening

S. Mehravar, F. Dadrass Javan, F. Samadzadegan, A. Toosi, A. Moghimi, R. Khatami, A. Stein

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Abstract

This paper focuses on spatial quality assessment of pan-sharpened imagery that contains valuable information of input images. Its aim is to show that fusion functions respond differently to different types of landscapes. It compares a quality assessment of an object-level procedure with that of a conventional pixel-level-based procedure which assigns uniform quality scores to all image pixels of pan-sharpened images. To do so, after performing a series of pan-sharpening evaluations, a weighted procedure for spatial quality assessments of pan-sharpening products, allocating spatially varying weight factors to the image pixels proportional to their level of spatial information content is proposed. All experiments are performed using five high-resolution image datasets using fusion products produced by three common pan-sharpening algorithms. The datasets are acquired from WorldView-2, QuickBird, and IKONOS. Experimental results show that the spatial distortion of fused images for the class vegetation cover exceeds that of man-made structures, reaching more than 4% in some cases. Our procedure can preclude illogical fidelity estimations occurring when pan-sharpened images contain different land covers. Since particular image structures are of high importance in remote sensing applications, our procedure provides a purpose-oriented estimation of the spatial quality for pan-sharpened images in comparison with conventional procedures.

Original languageEnglish
JournalInternational journal of image and data fusion
DOIs
Publication statusE-pub ahead of print/First online - 3 May 2021

Keywords

  • Spatial quality
  • impact of landscape
  • object-level evaluation
  • pan-sharpened satellite imagery
  • weighted average
  • UT-Hybrid-D

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