SobelFilter Task
This task performs Sobel filtering: a non-linear, edge-enhancing, special-case filter that uses an approximation of the true Sobel function.
Example
; Start the application
e = ENVI()
; Open an input file
File = Filepath('qb_boulder_msi', Subdir=['data'], $
Root_Dir=e.Root_Dir)
Raster = e.OpenRaster(File)
; Get the task from the catalog of ENVITasks
Task = ENVITask('SobelFilter')
; Define inputs
Task.INPUT_RASTER = Raster
; Run the task
Task.Execute
; Get the collection of data objects currently available in the Data Manager
DataColl = e.Data
; Add the output to the Data Manager
DataColl.Add, Task.OUTPUT_RASTER
; Display the result
View = e.GetView()
Layer = View.CreateLayer(Task.OUTPUT_RASTER)
Syntax
Result = ENVITask('SobelFilter')
Input properties (Set, Get): ADD_BACK, INPUT_RASTER, OUTPUT_RASTER_URI
Output properties (Get only): OUTPUT_RASTER
Properties marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Properties marked as "Get" are those whose values you can retrieve but not set.
Methods
This task inherits the following methods from ENVITask:
Properties
This task inherits the following properties from ENVITask:
This task also contains the following properties:
ADD_BACK (optional)
Specify a value between 0.0 and 1.0, specifying the filter add-back percentage. A value of 1.0 is equal to 100%.
INPUT_RASTER (required)
Specify a raster on which to perform Sobel filtering.
OUTPUT_RASTER
This is a reference to the output raster of filetype ENVI.
OUTPUT_RASTER_URI (optional)
Specify a string with the fully qualified filename and path of the associated OUTPUT_RASTER. If you do not specify this property, or set it to an exclamation symbol (!), a temporary file will be created.
Version History
ENVI 5.3 |
Introduced |
API Version
4.2
See Also
ENVITask, DirectionalFilter Task, DirectionalKernel Task, GaussianHighPassFilter Task, GaussianHighPassKernel Task, GaussianLowPassKernel Task, GaussianLowPassFilter Task, HighPassFilter Task, HighPassKernel Task, LaplacianFilter Task, LaplacianKernel Task, LowPassFilter Task, LowPassKernel Task, MedianFilter Task , RobertsFilter Task, RasterConvolution Task