ENVICalculateConfusionMatrixFromRasterTask

This task returns a reference to an ENVIConfusionMatrix object computed from a classification raster and truth ROIs.

The classification raster contains predicted class values from a classification, which are accompanied by class names. The truth ROIs contain the actual, or expected, class names of a particular region of the raster. A confusion matrix is created by comparing the predicted names to the truth names.

Example

See the following code examples:

Syntax

Result = ENVITask('CalculateConfusionMatrixFromRaster')

Input properties (Set, Get): INPUT_RASTER, INPUT_ROIS, OUTPUT_CONFUSION_MATRIX_URI

Output properties (Get only): OUTPUT_CONFUSION_MATRIX

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:

COMMUTE_ON_DOWNSAMPLE

INPUT_RASTER (required)

Specify a classification raster.

INPUT_ROIS (required)

Specify an array of ENVIROIs containing truth data.

OUTPUT_CONFUSION_MATRIX

This is a reference to the output ENVIConfusionMatrix object.

OUTPUT_CONFUSION_MATRIX_URI (optional)

Specify a string with the fully qualified filename and path of the output object. If you do not specify this property, the output object (.epo) is only temporary. Once ENVI is closed, it deletes the temporary file. Restore the object later using ENVIRestoreObject.ENVIConfusionMatrix is a persistable object that can be saved and restored.

Version History

ENVI 5.4

Introduced

API Version

3.3