Change detection techniques

Change detection techniques are used to identify and analyze differences between multiple images of the same area captured at different times. These differences can indicate various types of changes, such as urban growth, deforestation, land cover change, natural disasters, and infrastructure development. Change detection plays a crucial role in environmental monitoring, land management, disaster response, and urban planning. Here are some common change detection techniques:

1. Image Differencing: Image differencing involves subtracting pixel values between two images to highlight areas of change. The resulting difference image contains positive, negative, or zero values, indicating areas where the pixel values have increased, decreased, or remained unchanged, respectively. Thresholding or clustering techniques can be applied to the difference image to identify ____ _________ ____ _______ ________ _______.
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