GBDX

ENVI® Spectral Adaptive Coherence Estimator Using Subspace Background Statistics

This task performs the Adaptive Coherence Estimator (ACE) spectral analysis, using the mean and covariance from the Subspace Background Statistics task.

GBDX Registered Name: ENVI_SpectralAdaptiveCoherenceEstimatorUsingSubspaceBackgroundStatistics
Provider: Harris Geospatial Solutions

Inputs

The following table lists all ENVI_SpectralAdaptiveCoherenceEstimatorUsingSubspaceBackgroundStatistics inputs.
Mandatory (optional) settings are listed as Required = True (Required = False).

Name Required Default Valid Values Description
file_types False N/A string GBDX Option. Comma seperated list of permitted file type extensions. Use this to filter input files -- Value Type: STRING[*]
input_raster True N/A See ENVIRASTER input type Specify a raster on which to perform the target detection. -- Value Type: ENVIRASTER
input_raster_format False N/A See ENVIRASTER input type Provide the format of the image, for example: landsat-8. -- Value Type: STRING
input_raster_band_grouping False N/A See ENVIRASTER input type Provide the name of the band grouping to be used in the task, ie - panchromatic. -- Value Type: STRING
input_raster_filename False N/A See ENVIRASTER input type Provide the explicit relative raster filename that ENVI will open. This overrides any file lookup in the task runner. -- Value Type: STRING
input_raster_raw_output False False See ENVIRASTER input type Provide True to output an ENVI Binary instead of a tif. -- Value Type: STRING
threshold False 0.9 string Specify the fraction of the background to use for calculating the subspace background statistics. The data type is floating-point. The allowable range is 0.500 to 1.000 (the entire image). -- Value Type: DOUBLE -- Default Value: 0.9
spectra True N/A string Specify the target spectra. It is a floating-point array. The array size is [number of bands,number of target spectra]. -- Value Type: DOUBLEARRAY
output_raster_uri_filename False N/A string Specify a string with the fully-qualified path and filename for OUTPUT_RASTER. -- Value Type: STRING

Outputs

The following table lists all ENVI_SpectralAdaptiveCoherenceEstimatorUsingSubspaceBackgroundStatistics outputs.
Mandatory (optional) settings are listed as Required = True (Required = False).

Name Required Default Valid Values Description
task_meta_data False N/A directory GBDX Option. Output location for task meta data such as execution log and output JSON
output_raster_uri True N/A directory Output for OUTPUT_RASTER. -- Value Type: ENVIURI

Output structure

The output_raster_uri file will be written to the specified S3 Customer Account Location.

Background

For additional background information on this task please refer to the Harris Geospatial ENVI documentation and
ENVI® Spectral Adaptive Coherence Estimator Using Subspace Background Statistics.

Contact

If you have any questions or issues with this task, please contact gbdx-support@digitalglobe.com.