| 发明名称 | Boundary extraction method and apparatus | ||
| 摘要 | The present invention discloses a boundary extraction method and apparatus, the method including: a gradient estimation step of estimating a gradient of each pixel in a captured image; a gradient adjustment step of adjusting, by enhancing a gradient of a target boundary of an object contained in the captured image and weakening a gradient of a noise boundary, the estimated gradient, so that the adjusted gradient is considered as a current gradient; and a boundary extraction step of extracting a boundary of the object based on the current gradient. According to the embodiments of the invention, in a case of using a non-contact imaging device to capture an image, it is possible to more accurately extract a boundary of an object contained in the captured image. | ||
| 申请公布号 | US9202282(B2) | 申请公布日期 | 2015.12.01 |
| 申请号 | US201313906001 | 申请日期 | 2013.05.30 |
| 申请人 | FUJITSU LIMITED | 发明人 | He Yuan;Sun Jun;Naoi Satoshi |
| 分类号 | G06T7/00;G06T5/00;G06T5/20 | 主分类号 | G06T7/00 |
| 代理机构 | Staas & Halsey LLP | 代理人 | Staas & Halsey LLP |
| 主权项 | 1. A boundary extraction method, comprising: a gradient estimation step of estimating a gradient of each pixel in a captured image; a gradient adjustment step of adjusting, by enhancing a gradient of a target boundary of an object contained in the captured image and weakening a gradient of a noise boundary, the estimated gradient, so that the adjusted gradient is considered as a current gradient; and a boundary extraction step of extracting a boundary of the object based on the current gradient, wherein in the gradient adjustment step, the estimated gradient is weighed with a weight determined based on a gradient difference between two predetermined adjacent regions of each pixel point to enhance the gradient of the target boundary and weaken the gradient of the noise boundary. | ||
| 地址 | Kawasaki JP | ||