Multi-trail spot click-event detection method
AssigneeIndustrial Technology Research Institute
InventorSheng-Wen Jeng
Life of this patent
Estimating the term…
Abstract
A multi-trail spot click-event detection method is disclosed, which uses a camera to capture a plurality of consecutive images from a display screen. The camera is connected to a host and sends the consecutive images to the host for determining if a click-event occurs. Firstly, pixels of each difference image with the brightness difference in a pre-determined range are selected to form blobs. Next, possible spots of the blobs in each difference image are found. Then, the possible spots found are assigned to a specific trail. Finally, when a spot of the specific trail is absent at a next time point immediately after the spot is presented, occurrence of a click-event is detected.
Claims10
A multi-trail spot click-event detection method, which applies a spot to perform click event operation on a display screen and uses a camera, connected to a host, to capture multiple images from the display screen at consecutive time points, comprising the steps:
- a possible spot finding step, which subtracts every two consecutive images captured by the camera to thus obtain difference images, and selects pixels of each difference image with brightness in a first determined range to thus form blobs;
- a possible spot determining step, which finds a first blob from the blobs of each difference image that has an area in a second predetermined range, and regards spots of the first blob found as possible spots;
- a multi-trail handling step, which sets start data for at least one trail array and subsequently classifies the first blob in each difference image into the at least one trail array;
- and
- a spot click-event detecting step, which determines if there is a spot in a consecutive blob of the at least one trail array in accordance with the consecutive blob of the at least one trail array existing at a next time point or not, and thus decides that a spot click-event occurs when the spot is absent at the next time point immediately after the spot is presented.
Dependencies are inferred from the claim text.