The Change Detection task contains the Image Differencing Change Detection and the Example Change Detection tasks. The Image Differencing Change Detection task walks you through simple image differencing, a common remote sensing workflow used to quickly find areas of change in multi-spectral imagery. The Example Change Detection workflow walks the user through the use of the Change 2015 2013 raster processing chain, which contains the image differencing workflow in one raster function; that can be quickly applied to imagery to quickly find areas of change. To use other imagery, adjust the band combination for the NDVI to your specific sensor, and adjust the high and low threshold values to capture relative change.