| 摘要 |
The present invention relates to an apparatus and method capable of distinguishing and recognizing an infrared light source and peripheral reflected light. The method, in an operation method of a dongle, comprises the processes of: recognizing two or more infrared ray points displayed on an electronic blackboard; and confirming that one infrared ray point of the recognized two or more infrared ray points is projected from an infrared ray pen. [Reference numerals] (101) Electronic device; (102) Projector; (103) Electronic blackboard; (105) Infrared camera; (AA) Dongle |
