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Steps to measure and validate expected features

The following steps provide a basic methodology for using the MIL Metrology module:

  1. Allocate a metrology context to store the features and tolerances of your metrology template and to store global processing settings, using MmetAlloc(). When you allocate a metrology context, the global reference frame is automatically created.

  2. Allocate a metrology result buffer to hold the results of your calculations, using MmetAllocResult().

  3. Define the features of your metrology template. For each feature:

    1. Add the feature to the template, using MmetAddFeature(). Typically, you should add physically measured features before constructed features.

    2. For a physically measured feature, you must set the feature's metrology region in the template, using MmetSetRegion(). The features with which to build constructed features can also have a delimited metrology region.

    3. If necessary, adjust feature settings using successive calls to MmetControl().

  4. Define the geometric tolerances of your metrology template. For each tolerance:

    1. Add the tolerance to the template, using MmetAddTolerance().

    2. If necessary, adjust tolerance settings using successive calls to MmetControl().

  5. If necessary, specify your required global processing settings, using successive calls to MmetControl().

  6. If necessary, reposition features (typically, a reference frame) in the template, depending on the location of the object in the target image, using MmetSetPosition().

  7. Calculate features and validate geometric tolerances for the object in the target image, using MmetCalculate().

  8. Retrieve the required results from the result buffer, using MmetGetResult().

  9. If necessary, draw specific metrology result features and geometric tolerances in an image buffer, using MmetDraw().

  10. If necessary, save your metrology context, using MmetSave() or MmetStream().

  11. Free your metrology context and result buffer, using MmetFree().