| 摘要 |
A method for deriving a representation of an image, by processing signals corresponding to the image, comprises identifying a plurality of feature points in the image, deriving feature descriptors of feature points, and assigning feature descriptors to pre-defined centre points, wherein each feature descriptor is assigned to a plurality of centre points, the method further comprising, for each centre point, calculating the difference between each feature descriptor assigned to said centre point, deriving a value descriptor for each centre point from said calculated differences, and deriving the representation from said value descriptors for said centre points. |
