Take a look at the following example that illustrates the concept of Region of Interest repositioning using a coordinate system.
From the main menu, select Help>>Solution Wizard..., then select Dental Floss Inspection from the Pharmaceuticals solutions in the tree.
Click Load Solution.
This example shows how you can use for example a pattern matching step to first locate the object, define what we call a coordinate system that will be used to reposition regions of interests in later steps using the position and angle found by the pattern matching step.
In this example, the ROIs defined in the Measure Area Intensity step are repositioned using the coordinate system and appear at the same location on each dental floss, allowing to accurately measure the intensity in specific areas to determine the presence/absence of toothpaste and dental floss wires.
Pattern matching is only one of the possible locating tools you can use to define locate an object, In some applications, edge detection is often used for a similar purpose. You can reposition ROIs based on horizontal, vertical and angular offsets.
Hope this helps.
Christophe
