Sub-pixel mapping and sub-pixel sharpening using neural network predicted wavelet coefficients

Koen Mertens, LPC Verbeke, T Westra, RR De Wulf

    Research output: Contribution to journalA1: Web of Science-articlepeer-review


    Sub-pixel mapping and sub-pixel sharpening are techniques for increasing the spatial resolution of sub-pixel image classifications. The proposed method makes use of wavelets and artificial neural networks. Wavelet multiresolution analysis facilitates the link between different resolution levels. In this work a higher resolution image is constructed after estimation of the detail wavelet coefficients with neural networks. Detail wavelet coefficients are used to synthesize the high-resolution approximation. The applied technique allows for both sub-pixel sharpening and sub-pixel mapping. An algorithm was developed on artificial imagery and tested on artificial as well as real synthetic imagery. The proposed method resulted in images with higher spatial resolution showing more spatial detail than the source imagery. Evaluation of the algorithm was performed both visually and quantitatively using established classification accuracy indices. (C) 2004 Elsevier Inc. All rights reserved.
    Original languageEnglish
    JournalRemote Sensing of Environment
    Issue number2
    Pages (from-to)225-236
    Number of pages12
    Publication statusPublished - 30-May-2004


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