1. You are in the Statistics step of the image analysis wizard.
  1. Select a class in the list and click Define Custom Feature.
  2. The Custom Statistic Feature Editor opens. All already defined features are displayed in the list, or on initial opening an empty default entry is already created.
  3. In the Custom Features list, click to add a new entry. Alternatively, if no feature has been defined yet, select the automatically displayed default entry.
  4. A new entry is added to the list.
  5. Under Define Custom Feature, define the Name for your feature and optionally specify a Unit, if applicable.
  6. In the Define Operands list, click to add a new operand. Alternatively, if no feature has been defined yet, select the automatically displayed default entry
  7. A new operand entry is created.
  8. Select the Class which is used to generate the operand.
  9. In the Features dropdown list, select the measurement feature that you want to use to define the operand.
  10. Select the Statistical Operation the operand is used for.
  11. The selected class and measurement feature are displayed as Expression.
  12. Repeat the previous steps to define all operands you need to calculate your custom statistical feature.
  13. All defined operands are displayed in the Define Operands list.
  14. Under Define Custom Expression, enter your operands and click on the mathematical operators to define the calculation for your custom statistical feature, e.g.
    100*(a/b+Math.Pow(c,2)).
  15. Click Verify Expression.
  16. The syntax of your expression is checked and verified. In case the expression is not valid, an error message is displayed.
  17. Repeat this whole workflow to create all custom statistical features required for the image analysis.
  18. All created features are displayed in the Custom Features list of the respective class.
  19. Click OK.
  20. The editor closes and saves the defined custom features. They are displayed in the list of the Statistics step of the analysis wizard.