NMI Field Based Inspection View
As a user, after reviewing the global inclusion types (oxide, sulfide, nitride) in the Global Results view, you want to retrieve standard specific inclusion types in the Field Based Inspection view.
The acquired tiles region image is shown in the upper area of the Field Based Inspection view. The grid indicates the complete measurement area which is the base for the calculation of standard specific method results as shown in the report document. An individual field has the size of a standard measuring field as defined in the tiles region setup, i.e. the complete measurement area is an integer multiple of the standard measuring fields. You can filter the detected inclusions by various criteria. The NMI Analysis module specific tools support you to interpret the results.
By default, the following tools are active in the Field Based Inspection view:
- The Analysis Results tool allows the selection of the desired standard results, see Analysis Results Selection Tool.
- The Specimen Overview tool provides information on the specimen, see Specimen Overview Tool.
- The Field Statistic tool shows the field based results for all standard specific inclusion types with field ratings, see Field Statistics Tool.
Every time you change a selected standard, the detected standard specific inclusions in the upper area of the Field Based Inspection view and in the field based statistics are updated accordingly.
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Filters for inspection of global inclusion types and the fields with the highest rating (worst fields). |
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Filter for inspection of standard specific inclusion types. |
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Activates the option to mark a ROI to classify multiple objects as artifacts in one step, see Reclassifying Inclusions in ROIs to Artifacts. |
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Activates and deactivates the grid overlay. |
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Activates and deactivates the annotations overlay. |
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Acquired tiles region image with the overlay grid of standard measuring fields. |
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Shows the selected field zoomed out in the Current Field view. |
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Live view of the camera showing the currently selected field. In the Current View, selected inclusions are shown centered. The live view is only available by using the acquisition workflow. |
Current Field View
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Info bar with inclusion data |
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Selected inclusion (hightlighted in color) |
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Buttons for inclusion revision |
Updating Live View by Interactive Stage Movement
In the NMI Field Based Inspection Live workbench, you can check each measure field in the Current Field view and in the Live view.
- NMI Field Based Inspection Live workbench is loaded.
- In Current Field view, select one of the Grid fields.
- The motorized scanning stage moves to the corresponding position on the specimen showing this field centered in the Live view. Note that the presented specimen area in the Live view is usually larger compared to the standard measuring field area.
- In the Current Field view, select a specific inclusion.
- The motorized scanning stage moves to the corresponding position on the specimen showing this inclusion centered in the Live view.
Representation of Inclusions and Artifacts
In the Field Based view, you can check inclusions and artifacts. To make them more visible, all particles being part of an inclusion (or agglomerate of inclusions) are surrounded by a bounding box. The color of the bounding box is related to the standard specific inclusion type. The orientation of the bounding box surrounding of the inclusions depends on the main deformation direction.
The box surrounding of the artifacts is a rotated rectangle, depending on the direction of the artifacts.
For information on grouping of inclusions, see Basic Principles of Inclusion Groupings.
Filtering the Field Based Inspection View
For a better orientation on the grid the current selected field is indicated by a blue and transparent color. Fields which contain a filtered inclusion type are presented with a thick, dark gray rectangle; this provides a fast overview on the location of certain inclusion types. You can filter the detected inclusions by the following global types:
- Oxides
- Sulfides
- Artifacts
- Worst Fields
Additionally, you can filter by standard specific inclusion types. The list content depends on the selected standard. For example for ASTM E45, you can filter by the following types:
- A Thin
- A Heavy
- B Thin
- B Heavy
- C Thin
- D Thin
- D Heavy
- Ds Heavy
- Ds Thin
- Dos Heavy
- Dos Heavy
Filtering inclusions
- You have performed an analysis.
- You are in the Field Based Inspection view.
- From the All Inclusions drop down list, and, if desired, from the All drop-down list, select the desired filter criteria.
- Only the filtered inclusions are displayed with their annotations.
Reclassifying Inclusions in ROIs to Artifacts
You have the option to reclassify multiple inclusions as artifacts in one step. We recommend this procedure if artifacts are falsely detected as inclusion, e.g. if the specimen was prepared sub optimally (scratches etc.).
- You have performed an analysis.
- You are in the Field Based Inspection view.
- In the tiles region image, zoom in to identify objects which should be marked as artifacts, and click Mark ROI.
- The cursor is activated.
- Click the left mouse button to draw a polygon line around the detected inclusions that you want to reclassify. This is indicated by a red polygon line. Click the right mouse button to confirm the drawing.
- All inclusions within the frame and those touched by the frame are aligned to X- and Y axes and marked with violet rectangles for reclassification.
- Click Classify as Artifacts.
- The marked inclusions in the drawn region have changed to type Artifact. The polygon disappears.
- The results in the Field Statistics tool are updated accordingly.
Understanding the Statistic
The Field Statistics tool displays an overview of the field values. Each field can be identified by an unique ID. For a selected field in the grid, all results are presented per inclusion type, this includes the field ratings and the total number and size of inclusions.
For more information, see Filtering the Field Based Inspection View.
- You are in the NMI Field Based Inspection view.
- In the top window pane, activate a field and/or in the Analysis Results Selection tool, select a standard.
- In the Field statistics tool, the values are updated immediately.