Imagery always needs to be geometrically corrected to a map coordinate system to be useful. For certain applications such as change detection, resolution merge, mosaicking and even simple layer stacking, the geometric correction needs to be highly accurate.
IMAGINE AutoSync™ is a new add-on for ERDAS IMAGINE® that takes two (or more) images of potentially dissimilar type, such as IKONOS and SPOT5, and automatically generates thousands of tie points between the images, producing a geometric model which ties the images together with high accuracy. This method can be used to improve the registration between already georeferenced data sets, or it can be used to correlate new raw imagery to an existing georeferenced image base to quickly georeference the new imagery.
A second workflow, Edge Matching, allows for a localized model to be applied in the overlap region of image pairs. Using a process similar to the first, tie points are generated in the region of overlap to pull misaligned features into alignment.
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GIS Weekly Magazine
Susan Smith
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Look for the next issue of GIS Weekly Magazine on May 28, 2012.
Each GISWeekly Review delivers to its readers news concerning the latest developments in the GIS industry, along with a selection of other articles that we feel you might find interesting. |
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