Touch screen signal processing with single-point calibration

摘要: A coordinate detection system can comprise a display screen, touch surface corresponding the top of screen or material positioned above and defining area, at least one camera outside area configured to capture an image space surface, processor executing program code identify whether object interferes with light from source projected through based on captured by camera. The be carry out calibration routine utilizing single point in order determine plane using mirror images features adjacent features, and/or normal reflective defined its image.