Change detection

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Change detection (dt. Remote sensing change detection ) is a remote sensing-pending method for detecting and mapping of changes in the state of the surface of the earth between two or more successive remote sensing images . The acquisition and mapping can be done both visually ( visual image interpretation ) and with the aid of digital image processing methods .

In general, change detection refers to episodic and abrupt temporal changes in the state of the earth's surface. These can be triggered, for example, by natural disasters or massive human interventions in nature, such as clear cuts , slash and burn , urbanization, etc.

Recurring changes in the earth's surface, such as the phenological development of plant stocks or periodic changes in sea surface temperature, on the other hand, are assigned to remote sensing time series analysis .