Locator Adaptive High Sensitivity Detects the most low-contrast contours and noise. Fixed Value Sets an absolute value for the sensitivity to contrast. A typical situation for the use of a fixed value is a setting in which there is little variance in lighting con- ditions. l The numerical fixed value, from 1 - 255, corresponds to the minimum step in grey-level values required to detect contours. l A lower value adds more contours at the expense of adding more noise, which may generate false detections and/or slow down the search pro- cess. Search Search parameters are constraints that restrict the Locator's search process.
Conformity Tolerance Conformity Tolerance defines the maximum allowable local deviation of instance contours from the expected model contours. Its value corresponds to the maximum distance by which a matched contour can deviate from either side of its expected position in the model. Portions of the contour that are not within the Conformity Tolerance range are not con- sidered to be valid. Only the contours within Conformity Tolerance are recognized and cal- culated for the Minimum Model Recognition search constraint. Tolerance is either Default or user-specified. ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 566