This task performs a union or intersection of multiple ROI geometries into a single output ROI, Note that this task only works with geometry and will ignore ROIs that contain pixels or thresholds in their definitions.
Example
e = ENVI()
File = Filepath('qb_boulder_roi.xml', Subdir=['data'], $
Root_Dir=e.Root_Dir)
Regions = e.OpenROI(File)
Task = ENVITask('MergeROI')
Task.INPUT_ROIS = Regions
Task.OPERATION = 'Union'
Task.ROI_COLOR = [200,0,0]
Task.ROI_NAME = 'Union Example'
Task.Execute
e.Data.Add, Task.OUTPUT_ROI
RasterFile = Filepath('qb_boulder_msi', Subdir=['data'], $
Root_Dir=e.Root_Dir)
View = e.GetView()
BaseRaster = e.OpenRaster(RasterFile)
Layer = View.CreateLayer(BaseRaster)
roiLayer = Layer.AddRoi(Task.OUTPUT_ROI)
Syntax
Result = ENVITask('MergeROI')
Input parameters (Set, Get): INPUT_ROIS, OPERATION, OUTPUT_ROI_URI, ROI_COLOR, ROI_NAME
Output parameters (Get only): OUTPUT_ROI
Parameters marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Parameters marked as "Get" are those whose values you can retrieve but not set.
Input Parameters
INPUT_ROIS (required)
Specify the ROIs to merge.
OPERATION (required)
Specify which method used to merge the ROIs:
The default value is Union.
OUTPUT_ROI_URI (optional)
Specify a string with the fully qualified path and filename for OUTPUT_ROI.
ROI_COLOR (optional)
Specify the RGB triplet values for the output ROI color.
ROI_NAME (optional)
Specify the name of the output ROI.
Output Parameters
OUTPUT_ROI
This is a reference to the output ROI.
Methods
Execute
Parameter
ParameterNames
Properties
DESCRIPTION
DISPLAY_NAME
NAME
REVISION
TAGS
Version History
See Also
ENVITask, ENVITask::Parameter