Remote Sens. 2014, 6(4), 2845-2863; doi:10.3390/rs6042845
Article

A Combination of TsHARP and Thin Plate Spline Interpolation for Spatial Sharpening of Thermal Imagery

1email, 1email, 1,* email, 1email and 2email
Received: 25 November 2013; in revised form: 20 February 2014 / Accepted: 6 March 2014 / Published: 28 March 2014
(This article belongs to the Special Issue Analysis of Remote Sensing Image Data)
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Abstract: There have been many studies and much attention paid to spatial sharpening for thermal imagery. Among them, TsHARP, based on the good correlation between vegetation index and land surface temperature (LST), is regarded as a standard technique because of its operational simplicity and effectiveness. However, as LST is affected by other factors (e.g., soil moisture) in the areas with low vegetation cover, these areas cannot be well sharpened by TsHARP. Thin plate spline (TPS) is another popular downscaling technique for surface data. It has been shown to be accurate and robust for different datasets; however, it has not yet been attempted in thermal sharpening. This paper proposes to combine the TsHARP and TPS methods to enhance the advantages of each. The spatially explicit errors of these two methods were firstly estimated in theory, and then the results of TPS and TsHARP were combined with the estimation of their errors. The experiments performed across various landscapes and data showed that the proposed combined method performs more robustly and accurately than TsHARP.
Keywords: thermal sharpening; land surface temperature; TsHARP; thin plate spline; error estimation
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MDPI and ACS Style

Chen, X.; Li, W.; Chen, J.; Rao, Y.; Yamaguchi, Y. A Combination of TsHARP and Thin Plate Spline Interpolation for Spatial Sharpening of Thermal Imagery. Remote Sens. 2014, 6, 2845-2863.

AMA Style

Chen X, Li W, Chen J, Rao Y, Yamaguchi Y. A Combination of TsHARP and Thin Plate Spline Interpolation for Spatial Sharpening of Thermal Imagery. Remote Sensing. 2014; 6(4):2845-2863.

Chicago/Turabian Style

Chen, Xuehong; Li, Wentao; Chen, Jin; Rao, Yuhan; Yamaguchi, Yasushi. 2014. "A Combination of TsHARP and Thin Plate Spline Interpolation for Spatial Sharpening of Thermal Imagery." Remote Sens. 6, no. 4: 2845-2863.


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