| Detecting changes in land cover through time using remotely sensed imagery is a powerful application that has seen increased use. Before a time series of remotely sensed imagery can be used for change detection, images must first be standardized for effects outside of real surface change. This thesis established a validation protocol to evaluate the effectiveness of an automated technique for normalizing temporally separate but spatially coincident imagery. Using the concept of pseudo-invariant features between master-slave image pairs, spatially coincident points are identified from images and a regression equation is calculated to normalize slave images to a master.; Image subtraction showed decreases in master-slave differences as a result of the standardization process, and the process behaved appropriately when there should be no difference between master and slave images. I also found that comparable bands between MSS and TM sensors are similar enough that linear regression may not significantly reduce between-sensor differences. |
