Change detection is a research area focused on the identification and analysis of changes that occur in a system, environment, or dataset over time. This can involve detecting changes in various types of data, such as images, remote sensing data, and time series data. Change detection techniques are used in a wide range of applications, including environmental monitoring, disaster response, surveillance, and infrastructure maintenance. Researchers in this area develop algorithms and methods to accurately detect and characterize changes in data, allowing for timely and informed decision-making.