AI4Copernicus – Sentinel-2 Change Detection (Security Bootstrapping services)
The Security Bootstrapping services and resources have been developed in order to support the AI4Copernicus project’s open calls by reducing the time and resources of the bidders in the data preparation and allowing them to focus on the development of innovative services based on AI. This pipeline computes (and classifies) the changes using as input a pair of S2-L2A products by using the Change Vector Analysis approach.
The Sentinel-2 Change Detection resource is available as a dockerized application. It is one of the Security Bootstrapping Services developed in AI4Copernicus.
The pipeline generates a series of products to assess the changes between both images. These products include:
- CVA: GeoTiff image with two bands. The first band is the amplitude of the change and the second band is the angle with respect to the reference vector.
- S2-CD: GeoTiff image with one band with pixel type Byte. It represents the classes of the detected changes.
The input of this pipeline is a pair of Sentinel-2 L2A products in their native SENTINEL-SAFE format (zipped or unzipped products are both supported). The inputs shall correspond to the same tile (e. g. same relative orbit).
Several parameters are exposed (e.g. resolution, bands, number of change classes), including when possible, a default value to facilitate the use by non-expert users.