Quantitative Analysis in Frequency Domain and Determination of Spatial Resolution in Image Fusion

doi:10.11947/j.AGCS.2016.20150146

Abstract

Abstract: Image fusion is one of the important steps to obtain high quality images.In this paper, the variation of signal frequency in image fusion is given according to the relationship between Nyquist frequency of high sampling rate,Nyquist frequency of low sampling rate and signal frequency.Then the frequency of the fused images is quantifying and the spatial resolution of the image is determined based on the the variation of signal frequency in image fusion.The high frequency information in the high resolution image is the information with the frequency between the Nyquist frequency of high sampling rate and the Nyquist frequency of low sampling rate.Finally, some fusion methods and remote sensing images are used to validate the proposed method. The experimental results show that the results obtained are consistent with the results of the experiment.

Key words: image fusion, signal frequency, resolution, object frequency, Fourier transform, Nyquist frequency

CLC Number:

P237

DUAN Wei, YAN Li. Quantitative Analysis in Frequency Domain and Determination of Spatial Resolution in Image Fusion[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(6): 691-697.

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