Change detection is one of the most common uses of remotely sensed data. IMAGINE DeltaCue, a new add-on for ERDAS IMAGINE® simplifies the complexity of the change detection process, rapidly moving users from image to information to results. Change detection is used to highlight or identify significant differences in imagery acquired at different times; playing an important role in the lifecycle of GIS features and providing the capability to update feature data based on new imagery.
An adaptable suite of processing procedures
This new add-on software uses project-based workflows to manage preprocessing, change detection, change filtering and change results viewing and interpretation. Wizard workflows assists users with initial inputs and selection of preprocessing and processing steps to target changes of interest. Types of change not of interest to the user can be quickly filtered out. Project files established by the wizard manage the resulting ancillary files generated, document procedures that have been run, allowing the user to return to a project and pick up where they left off.
Key application areas include:
- Detecting changes in land use & land cover
- Delineating wetlands loss and encroachment
- Estimating forest loss through development or disease
- Identifying new housing and infrastructure changes
- Mapping flood extent areas and disaster impact zones
Key Features include:
Change Algorithms
Customize processing for different applications
Change Filters
Filter change results based on specific spatial and spectral characteristics
Change Thresholding
Provides user with a more intuitive and dynamic way to set critical change thresholds
Automatic % change threshold allows for rapid, repeatable automatic processing
Automatic Preprocessing
Automatically crops analysis down to just the area in common to the image pair
Performs image to image radiometric normalization with accommodation for the effect of clouds and cloud shadow
Customized Change Viewer
Geo-linked windows that pan and zoom together with automatic synchronization
Overlay of change results on top of original imagery
Change magnifier that allows for rapid investigation of before and after areas
Flicker and swipe tools available off the toolbar
Contrast and Brightness enhancements easily applied to all layers
Interactive spectral segmentation tool allows for removal of spectral classes not of interest across entire image
Access to ERDAS IMAGINE's AOI, annotation and vector tools for output development
Rapid export of change detection results to ESRI shapefile format
Settings Files
Process settings can be saved for automatic use by less experienced users on similar image pairs
Site Monitoring Viewer
Customized display for the interpretation and monitoring of subtle changes of specific sites
Multitemporal display of individual bands as well as Tasseled Cap components
Blend tool
Provides misregistration filter to minimize the effect of false alarms due to poorly co-registered image pairs
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