The Remove method accepts a crop index or an array of crop indices, and it removes them from the ENVIAgCrops object. It also removes the metrics and radii corresponding to those indices.
This method requires a separate license for the ENVI Crop Science Module; contact your sales representative for more information.
Example
This example counts the crops in an image of emerging cotton plants. It creates an ENVIAgCrops object named outCrops and removes three crops.
e = ENVI(/HEADLESS)
File = Filepath('Cotton.dat', $
SUBDIR=['data','crop_science'], $
ROOT_DIR=e.Root_Dir)
Raster = e.OpenRaster(File)
subset = ENVISubsetRaster(Raster, BANDS=[1])
outCrops = ENVIAgCropCount(subset, 9, 12, $
GAUSSIAN_FACTOR=0.8, $
/INCLUDE_EDGES, $
INTENSITY_THRESHOLD=0.81, $
NUMBER_OF_INCREMENTS=12, $
OUTPUT_NCROPS=outputNumCrops, $
PERCENT_OVERLAP=60)
Print, outCrops.NCROPS
outCrops.Remove, [2,4,6]
Print, outCrops.NCROPS
Syntax
ENVIAgCrops.Remove, Index [, ERROR=variable]
Arguments
Index
Specify a zero-based crop index, or an array of crop indices, to remove. For example, specify [0] to remove the first crop in an ENVIAgCrops object. Or, specify an array of [2,4] to remove the third and fifth crops.
Keywords
ERROR
Set this keyword to a named variable that will contain any error message issued during execution of this routine. If no error occurs, the ERROR variable will be set to a null string (''). If an error occurs and the routine is a function, then the function result will be undefined.
When this keyword is not set and an error occurs, ENVI returns to the caller and execution halts. In this case, the error message is contained within !ERROR_STATE and can be caught using IDL's CATCH routine. See IDL Help for more information on !ERROR_STATE and CATCH.
See Manage Errors for more information on error handling in ENVI programming.
Version History
|
Crop Science 1.0.1
|
Introduced |
See Also
ENVIAgCrops