System and method for transforming an ordinary computer monitor screen into a touch screen
October 24, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInput-output coordinate transforming method and apparatus for input-integrated display Touch panel having parallax compensation and intermediate coordinate determination Diffusion-assisted position location particularly for visual pen detection Interactive projected video image display system Method and apparatus for extracting and treating digital images for seamless compositing Image-based touchscreen Algorithmic compensation system and method therefor for a touch sensor panel Man machine interfaces for entering data into a computer Method and apparatus for reconstructing geometry using geometrically constrained structure from motion with points on planes Stereo reconstruction employing a layered approach and layer refinement techniques InventorsAssigneeApplicationNo. 09696251 filed on 10/24/2000US Classes:345/173, Touch panel345/156DISPLAY PERIPHERAL INTERFACE INPUT DEVICEExaminersPrimary: Liang, ReginaAssistant: Nguyen, Jennifer T. Attorney, Agent or FirmInternational ClassG09G 500AbstractA system and method for turning a regular computer monitor screen into a touch screen using an ordinary camera. It includes an image-screen mapping procedure to correct for the non-flatness of the computer screen. It also includes a segmentation method to distinguish the foreground, for example an indicator such as a finger, from the background of a computer screen. Additionally, this system and method includes a robust technique of finding the tip point location of the indicator (such as the finger tip). The screen coordinates of the tip point are then used to control the position of the system indicator.Other References
Field of SearchDISPLAY PERIPHERAL INTERFACE INPUT DEVICECursor mark position control device Including orientation sensors (e.g., infrared, ultrasonic, remotely controlled) Plural image superposition Portable (i.e., handheld, calculator, remote controller) Touch panel With alignment or calibration capability (i.e., parallax problem) CRT having tracking capability HISTOGRAM PROCESSING With a gray-level transformation (e.g., uniform density transformation) With pattern recognition or classification For segmenting an image For setting a threshold | |
