Video Inspection Software User’s Guide
Vtouch Active Crosshair The Vtouch probe is the active crosshair used to acquire a single point by pressing the touch screen or clicking the mouse cursor on an edge. The Vtouch probe: • Can be used with either auto-taught or manually taught edge parameters • Provides the ability to choose the best possible point location on an edge thereby improving accuracy and repeatability • Requires an explicit feature measurement request, except for point features • Is particularly useful when single point acquisition and flexibility in point placement are required Auto Teach MeasureLogic Probe The auto teach MeasureLogic probe is extremely robust and is suitable for both soft and hard edges. The Auto Teach MeasureLogic probe: • Operates once for each tool firing, capturing many data points • Performs a statistical analysis of nearby edges and characterizes them • Edge parameters are then used, such as threshold (edge strength), and edge width, to follow and acquire points on edges that are parametrically similar • Is ideal for edges of good form characterization, and weak or strong edge contrast NOTE To improve low edge contrast point acquisition, the manual edge teach routine described below can be used in conjunction with MeasureLogic probe measurements. Manual Teach Procedure for the MeasureLogic Probe The default edge contrast recognition parameters are adequate for probing under most conditions using the MeasureLogic (or EyeMeasure) probe. However, when probing in conditions that make good image contrast impossible, edge contrast recognition parameters can be changed by performing the manual teach procedure. The Manual Edge Teach procedure is used to teach the Measure Logic Probe light to dark contrast thresholds when it becomes necessary to measure in the presence of weak edge contrast, thin edges, or both. • Manual Teach function performs an extensive analysis of edge contrast and calculates several parameters used for subsequent measurements using any of the video edge detection probes • A color change, to stake and candidate points, indicates points acquired under manually taught conditions • The manually taught probe can be returned to the default auto teach mode by pressing the Unteach Button
To perform the manual, teach procedure for the MeasureLogic probe: 1 When an edge is not recognized by the
MeasureLogic probe, press and hold on the edge in the video window. A magnified image of the edge will be shown, and the system will change edge contrast recognition parameters to accommodate the weakly defined edge.
Press and hold on the edge
Edge is not recognized by the MeasureLogic probe
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