Documentation

Create Automation Folder

Create a +vision/+labeler/ folder within a folder that is on the MATLAB^® path. For example, if the folder /local/MyProject is on the MATLAB path, then create the +vision/+labeler/ folder hierarchy as follows:

projectFolder = fullfile('local','MyProject');
automationFolder = fullfile('+vision','+labeler');
mkdir(projectFolder,automationFolder)

Define Class That Inherits from AutomationAlgorithm Class

At the MATLAB command prompt, enter the appropriate command to open the labeling app:

Then, load a data source, create at least one label definition, and on the app toolstrip, select Select Algorithm > Add Algorithm > Create New Algorithm. In the vision.labeler.AutomationAlgorithm class template that opens, define your custom automation algorithm. Follow the instructions in the header and comments in the class.

If the algorithm is time-dependent, that is, has a dependence on the timestamp of execution, your custom automation algorithm must also inherit from the vision.labeler.mixin.Temporal class. For more details on implementing time-dependent, or temporal, algorithms, see Temporal Automation Algorithms.

Save Class File to Automation Folder

To use your custom algorithm from within the labeling app, save the file to the +vision/+labeler folder that you created. Make sure that this folder is on the MATLAB search path. To add a folder to the path, use the addpath function.

Refresh Algorithm List in Labeling App

To start using your custom algorithm, refresh the algorithm list so that the algorithm displays in the labeling app. On the app toolstrip, select Select Algorithm Refresh list.

Check Label Definitions

When you click Automate, the app checks each label definition in the ROI Labels and Scene Labels panes by using the checkLabelDefinition method defined in your custom algorithm. Label definitions that return true are retained for automation. Label definitions that return false are disabled and not included. Use this method to choose a subset of label definitions that are valid for your custom algorithm. For example, if your custom algorithm is a semantic segmentation algorithm, use this method to return false for label definitions that are not of type PixelLabel.

Control Settings

After you select the algorithm, click Automate to start an automation session. Then, click Settings, which enables you to modify custom app settings. To control the Settings options, use the settingsDialog method.

Control Algorithm Execution

When you open an automation algorithm session in the app and then click Run, the app calls the checkSetup method to check if it is ready for execution. If the method returns false, the app does not execute the automation algorithm. If the method returns true, the app calls the initialize method and then the run method on every frame selected for automation. Then, at the end of the automation run, the app calls the terminate method.

The diagram shows this flow of execution for the labeling apps.