Abstract
The objective of this paper is to analyze the forest height retrieval methods from polarimetric SAR interferometry and their validation against ground truth.Both of the methods based on coherence optimization process and that on super-resolution method such as ESPRIT are generalized,analyzed,and compared.Also in this paper hybrid methods of ESPRIT and three-stages/three-stage Sinc are proposed and validated.The DLR quad-polarimetric interferometry ESAR data is used for forest height generation.The validation with ground truth shows that the three-stage and three-stage Sinc method have a relative better performance than all other methods despite with a overestimation of height but with a very good correlation with ground truth.In contrast,as in expectation,the direct ESPRIT phase differencing methods,due to their virtual height results,severally underestimates the forest heights but also with a poor correlation with ground truth.The hybrid methods of ESPRIT and three-stages/three-stage Sinc method,even a fast processing gained,lead to no improved results.
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