Journal
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
Volume 9, Issue 3, Pages 521-525Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LGRS.2011.2173290
Keywords
Cloud removal; image processing; image restoration; Landsat
Categories
Funding
- Project 863 of China [2009AA12004]
- National Science Foundation [1010314]
- State Key Laboratory of Earth Surface Processes and Resource Ecology
- International S&T Cooperation Program [2010DFB10030]
- Direct For Social, Behav & Economic Scie
- Division Of Behavioral and Cognitive Sci [1010314] Funding Source: National Science Foundation
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Thick-cloud contamination is a common problem in Landsat images, which limits their utilities in various land surface studies. This letter presents a new method for removing thick clouds based on a modified neighborhood similar pixel interpolator (NSPI) approach that was originally developed for filling gaps due to the Landsat ETM+ Scan Line Corrector (SLC)-off problem. The performance of the proposed method was evaluated with both simulated and real cloudy images and compared with that of a contextual multiple linear prediction (CMLP) method. The results show that the modified NSPI approach can greatly reduce the edge effects by CMLP. The reflectance restored by the modified NSPI approach is more accurate than that by CMLP, especially when the cloud-free auxiliary and cloudy images are acquired from different seasons and have different spectral characteristics.
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