RGB cloud free image of Sentinel-2 imageries using temporal transformation algorithm to identify paddy fields in Subang, West Java

Kustiyo, Rokhmatuloh, Adhi Harmoko Saputro, Dony Kushardono

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Getting a single acquisition cloud free remote sensing optical satellite image in the tropical country such as Indonesia is difficult, so combining the temporal images is necessary. This research proposes the methodology for generating RGB clouds free image of optical sentinel-2 satellite images with 5 days repetition acquisition, the whole acquisition data during 2018 in Subang district of West Java was used. The topographic flattening correction and cloud masking detection were used as pre-processing steps, then the temporal transformation was applied to produce the cloud free image. The temporal transformation results of the median, quantil-15% dan quantil-85% from each band than selected to get the best RGB combination for identifying the paddy fields. Spectral separability of Paddy Fields and Non-Paddy Field using Jeffries-Matusita (JF) distance method was used to select the best RGB composites. Usually, the JF distance was used in classification process, the higher value indicated that the two objects can be separated or distinguished each other’s. The results show that best natural composite base on JF distance is RGB of Minimum-Red, Minimum-Green, and Minimum-Blue with the JF distance of 0.42, 0.55, and 0.57. The best RGB True Color composite is RGB of Minimum-SWR1, Minimum-NIR1 and Minimum-Blue with the JF distance of 0.39, 0.47, and 0.49. Reviewing the results using visual interpretation shows that combining the natural color and true color composite can be used to identify paddy and non-paddy fields precisely. Generally, the paddy field is identified as blue and green color combination from the true color and natural color. Fishpond and paddy fields can be well separated, fishpond identified as blue color in true color composite and identified as white color in natural color composite. In north part of Subang the natural color composite separates the fishpond and paddy fields better than true color composite, but the sugar plantation is separate better in true color composite. Finally, this cloud free image results can be used to update the present paddy field map. This kind of Sentinel-2 data can be provided annually, so the paddy field can be monitor periodically.

Original languageEnglish
Title of host publicationACRS 2020 - 41st Asian Conference on Remote Sensing
PublisherAsian Association on Remote Sensing
ISBN (Electronic)9781713829089
Publication statusPublished - 2020
Event41st Asian Conference on Remote Sensing, ACRS 2020 - Deqing City, Virtual, China
Duration: 9 Nov 202011 Nov 2020

Publication series

NameACRS 2020 - 41st Asian Conference on Remote Sensing

Conference

Conference41st Asian Conference on Remote Sensing, ACRS 2020
Country/TerritoryChina
CityDeqing City, Virtual
Period9/11/2011/11/20

Keywords

  • Paddy fields
  • Sentinel-2
  • Spectral separability

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