SEQUENTIAL CLASSIFIER TRAINING FOR RICE MAPPING WITH MULTITEMPORAL REMOTE SENSING IMAGERY
Most traditional methods for rice mapping with remote sensing data are effective when they are applied to the initial growing stage of rice, as the practice of flooding during this period makes the spectral characteristics of rice fields more distinguishable. In this study, we propose a sequential...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-10-01
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| Series: | ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/IV-4-W2/161/2017/isprs-annals-IV-4-W2-161-2017.pdf |
| Summary: | Most traditional methods for rice mapping with remote sensing data are effective when they are applied to the initial growing stage of
rice, as the practice of flooding during this period makes the spectral characteristics of rice fields more distinguishable. In this study, we
propose a sequential classifier training approach for rice mapping that can be used over the whole growing period of rice for monitoring
various growth stages. Rice fields are firstly identified during the initial flooding period. The identified rice fields are used as training
data to train a classifier that separates rice and non-rice pixels. The classifier is then used as a priori knowledge to assist the training of
classifiers for later rice growing stages. This approach can be applied progressively to sequential image data, with only a small amount
of training samples being required from each image. In order to demonstrate the effectiveness of the proposed approach, experiments
were conducted at one of the major rice-growing areas in Australia. The proposed approach was applied to a set of multitemporal
remote sensing images acquired by the Sentinel-2A satellite. Experimental results show that, compared with traditional spectral-indexbased
algorithms, the proposed method is able to achieve more stable and consistent rice mapping accuracies and it reaches higher than
80% during the whole rice growing period. |
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| ISSN: | 2194-9042 2194-9050 |