Locator Note that the initial image is retained in the model; the image is not modified by the optim- ization process. Percentage Of Points To Analyze Percentage Of Points To Analyze sets the percentage of points on a model contour that are actually used to locate instances. This can be from 0.1 to 100%. For example, when Percentage Of Points To Analyze is set to the default 50% value, one out of two points are used. Increasing this value can increase the accuracy of the optimized model but incurs a longer optimization time. Higher values are more accurate and slower than lower values.
Minimum Required Features Minimum Required Features, set through the Model Editor, are features that need to be recognized for the Locator to accept a valid instance of an object. Although, typically, the pres- ence of all such features is required, the Minimum Required Features parameter lets you set a lower number of required features. Range: 0.1 ≤Range ≤100. Note that this parameter is expressed in terms of the number of required features in a model. It does not consider the amount of contour each required feature represents in the model. Instance Output Constraints Instance Ordering Instance Ordering sets the order in which object instances are output.
Selecting either Image Distance or World Distance also requires providing X, Y coordinates. l At the default Evidence setting, the instances are ordered according to their hypo- thesis strength. l Instances can be output in the order they appear in the image: Left To Right, Right To Left, Top To Bottom, and Bottom To Top. This feature is useful for pick-and-place applic- ations in which parts that are farther down a conveyor must be picked first. l The Quality setting orders instances according to their Match Quality. Instances hav- ing the same Match Quality are subsequently ordered by their Fit Quality.
This setting can significantly increase the search time because the Locator tool cannot output instance results until it has found and compared all instances to determine their order. The time required to output the first instance corresponds to the total time needed to search the image and analyze all the potential instances. The time for additional instances is zero because the search process is already complete. l Image Distance orders instances according to their proximity to a user-defined point in ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 572