Abstract
A method and apparatus (60) for processing an image are disclosed. For edge detection, the zero crossing pixel location, no, within the image is identified (11). Then, a sub-pixel position offset, a, is determined (21). The offset is a relationship between interpolated image and an interpolated kernel at the zero crossing pixel location. Finally, the interpolated position for the edge location, to, is determined (26) from the pixel location, no, and the sub-pixel poisition offset, a. For matching the detected edges of an object to edges of a model object, translation [v1, v2] between a detected edge of an object in the image and the corresponding edge of a model object is first determined (44). Next, cross correlation between the detected edge and the corresponding model edge is calculated (46). Then, translation error [e1, e2] is determined (48). Finally the translation is updated.
| Original language | American English |
|---|---|
| Patent number | WO03009232 |
| IPC | G06T 5/ 00 A I |
| Priority date | 16/07/01 |
| State | Published - 30 Jan 2003 |