Find the Perpendicular Projection of a Point on a Line

1. Click Machine Vision»Caliper or select Caliper from the Machine Vision tab in the Processing Functions palette. Vision Assistant displays and numerically labels all points that you located with the Edge Detector, Straight Edge (Rake), Circular Edge (Spoke), Centroid, Pattern Matching, Color Pattern Matching, Color Location, Shape Matching, Particle Analysis, or Circle Detection functions.
2. Select Perpendicular Projection in Geometric Feature.
3. Select three points (for example, points 1, 2, and 3) on the image by clicking them.
4. Click Measure. Vision Assistant computes the location of the perpendicular projection of point 3 on the line (point 1, point 2).
5. Click OK to add this step to the script.

Note  You must have already located the position of objects in the image using one of the following functions: Edge Detector, Straight Edge (Rake), Circular Edge (Spoke), Centroid, Pattern Matching, Color Pattern Matching, Color Location, Shape Matching, Particle Analysis, or Circle Detection.

Tips   You also can select points on the image by double-clicking them in the Points list. When a point is selected, Vision Assistant places a check mark to the left of the item. To save the data, click the Send Data to Excel button or the Save Results button.

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