Gripper Clearance Tool Inspection Configuration This field is used to select which criterion to use in deciding if a histogram passes or fails, and the minimum and maximum values for that criterion. The choices are: l Greylevel (0-255) l Variance (0-10,000) l Histogram pixel count (0-10,000) If the values of all histograms for an instance are within the range you set, the instance will be returned as passing. These are applied to all histograms in the tool. Although only one of these properties is active as a filter for the histograms at any given time, all three properties can be shown in the Results display. Grey Level This is the mean greylevel of each histogram.
Variance This is the variance, in greylevel value, from the mean greylevel of each histogram. Histogram pixel count This is the number of pixels in each histogram that are within the greylevel range that you set. Set the range for pixel count in this field. Set the greylevel range of pixels to consider with Threshold Black and Threshold White. These two properties are set in the Advanced Properties section of this tool. Refer to the following fig- ure. NOTE : Thresholds and Tails are all specified in the Advanced Properties section of Con- figuration. Click the Advanced Mode button to toggle between displaying and hiding Advanced Properties. ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 483