Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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US Patent 5311305 - Technique for edge/corner detection/tracking in image frames
Estimated Patent Expiration Date:
June 30, 2012Estimated 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.AbstractEdges/corners in an image can be detected and tracked over time by first sampling the image at periodic time intervals, and then processing the samples to obtain the intensity value for each pixel within each image acquired at a particular time. For each pixel, the bidirectional intraframe correlation of its intensity with the intensities of pixels along each of several directions within the same image is computed. Also, the bidirectional interframe correlation of the intensity of each pixel in each image with the intensities of pixels along each of several directions spanning several images is established. The intraframe and interframe intensity correlations are processed to obtain spatiotemporal tangent information about isobrightness surfaces and curves which are indicative of edges and corners, respectively, and their image motions.Other References
| InventorsAssigneeApplicationNo. 906916 filed on 06/30/1992US Classes:348/169, OBJECT TRACKING348/208.99, Camera image stabilization348/416.1Including motion vectorExaminersPrimary: Chin, Tommy P.Assistant: Lee, Richard Attorney, Agent or FirmUS Patent References4884136, Motion detection circuitIssued on: 11/28/1989 Inventor: Ninomiya, et al.5018218, Confirmed boundary pattern matching Issued on: 05/21/1991 Inventor: Peregrim, et al.5053876, Image stabilization Issued on: 10/01/1991 Inventor: Blissett, et al.5153719Method of detecting horizontal movements in the picture contents of a television signal Issued on: 10/06/1992 Inventor: Ibenthal International ClassH04N 007/18 |
