Blob Analyzer Perimeter Results Checking the Perimeter Results box in the Data Collection property enables the following res- ults: ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 419 Object Definition Elapsed Time The Elapsed Time is the total execution time of the Blob Analyzer. Elapsed Time is shown imme- diately below the Display window at each iteration of the Blob Analyzer. Instance Identification number of the found blob. Each blob found and output by the Blob Analyzer tool is a blob instance. Frame/Group The frame or group to which the result belongs. Area Area results are returned in squared calibrated- units or pixels depending on the positioning mode applied to the Blob Analyzer.
Position X The X coordinate of the center of mass of the blob. Position Y The Y coordinate of the center of mass of the blob. The center of mass is defined l by the average position of the pixels in the blob and takes into account the effect of weighted pixel values, in the case of soft thresholding. In the Blob Results display, l the center of mass is dis- played as a crosshair and an index number. Position coordinates are referenced in the user-selected coordinate system: Tool, Object, Image, or World. Position Angle The angle of the located instance with respect to the X-axis of the selected coordinate system. This requires Calculate Blob Angle to be set to true.