Bilateral filtering-based enhanced pansharpening of multispectral satellite images

N. H. Kaplan, I. Erer

Research output: Contribution to journalArticlepeer-review

65 Citations (Scopus)

Abstract

An efficient pansharpening method should inject the missing geometric information to the multispectral (MS) image while preserving its radiometric information. Widely used additive wavelet transform-based pansharpening methods extract the missing high-frequency information by decomposing the panchromatic (PAN) image and adding the detail layers to the low-resolution MS (LRM) image. However, this approach causes a redundant detail injection, leading to artifacts in the fusion result. In this letter, we propose to decompose the high-resolution-PAN image using an edge-preserving decomposition which will decrease the amount of redundant high-frequency injection. The missing high-frequency information of the LRM image is obtained by the decomposition of the PAN image using a multiscale bilateral filter. The spatial and range parameters of the bilateral filter are optimized so as to enhance spatial and spectral metrics. The fusion results are compared with the widely used additive wavelet luminance proportional (AWLP) and recently proposed improved AWLP fusion methods. The resulting images as well as evaluation metrics demonstrate that the proposed injection approach has better performance.

Original languageEnglish
Article number6810821
Pages (from-to)1941-1945
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Volume11
Issue number11
DOIs
Publication statusPublished - Nov 2014

Keywords

  • Additive wavelet transform (ATWT)
  • bilateral filter
  • image fusion
  • multispectral (MS) image
  • pansharpening

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