Part Description:Barcode on metal spray can.
Industry:Packaging
Inspection Type:Orientation

Summary
The object of this inspection is to detect the presence and orientation of a barcode on the side of spray cans. The cans are to be inspected while traveling down a conveyor. The label is white on a red background. Fluorescent light has high blue content and proved to be ideal to obtain high contrast between white and red color. A find rectangle fudicial SoftSensor was used to track the barcode area. The orientation of the bar code with respect to the white rectangle was nspected using horizontal and vertical line - FeatureCount SoftSensors. The FeatureCount line SoftSensors would cross either perpendicular or parallel to the barcode lines depending on the barcode's orientation. A good sample with vertically oriented barcode will be seen by the Horizontal Line Feature Count as having multiple features (greater than 10) while the vertical line FeatureCount will show only a few features (5 during testing). Thus, a passing Horizontal Line Feature Count and a failing vertical line FeatureCount will indicate a good barcode positioning. Since the rotational orientation of the can cannot be regulated, a four sensor head arrangement with each sensor head covering a 90 deg FOV would be necessary to ensure total inspection.