Detecting clear and reflective objects are some of the most challenging sensor applications. Light can burn through a target or be reflected away erratically, making accurate detection difficult.
Dark objects are difficult to detect since they reflect very little light back to the sensor. In addition, black on black targets (low contrast between target and background) are especially challenging.
In packaging, targets often contain vibrant, multicolored graphics of varying reflectivity. Such varied targets can be difficult to detect reliably, especially when there are many color transitions.
Many applications, such as registration mark detection and high-speed part counting, require sensors with response speeds fast enough to reliably detect fast moving targets.
