| Title Of The Magazine |
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING |
| Year Information |
2025 |
| KeyWord |
Cropping intensity, harmonic analysis of time series (HANTS), paddy rice distribution, paddy rice planted area, quadratic difference, Sentinel-1 |
| Authors |
Junbin Li, Hongwei Zeng, Member, IEEE, Miao Zhang, Bingfang Wu, Yuanwei Qin, Yan Xie, Sven Gilliams, Yuting Luo |
| Intro |
Accurate assessment of paddy rice planted area is
challenging in tropical regions where the availability of optical
satellite data and samples is limited due to the high prevalence
of cloudy and rainy periods. This study, carried out in Vietnam,
presents a novel two-step method to estimate annual paddy
rice planted area at the 10-m spatial resolution overcoming the
limitations of scarce optical remote sensing data and groundtruth
samples. First, an easy and effective visualization method
was designed to collect rice and nonrice samples based on the
significant color difference of consecutive three monthly VH
composite data between paddy rice fields and other land covers
during the flooding to transplanting stage. Second, rice spatial
distribution information was extracted by taking full advantage
of coarse optical imagery in a spatialtemporal continuum and
Sentinel-1/2 images combined with rice potential zone (RPZ)
generation by threshold and rice fine classification by random
forest. Third, the cropping intensity of paddy rice fields was
identified from monthly VH bands smoothed by harmonic
analysis of time series (HANTS) using the quadratic difference
method. The utilization of RPZ improved R2 of the paddy rice |
| Links To Magazines |
https://doi.org/10.1109/TGRS.2025.3549296 |
English
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