| 摘要 |
The invention relates to retrieving a test block (180) at a freely selectable position from a blockwise stored reference image. A method for retrieving a test block (180) from a blockwise stored reference image is described. Said method comprises the steps of retrieving a reference block (110) and generating from the reference block (110) a first corona block (130, 140, 160, 170). Then, the test block (180) is composed using a subsection of the reference block (110) and a subsection of the first corona block(130, 140, 160, 170). In generating the corona (130, 140, 160, 170) blockwise when needed, the corona (130, 140, 160, 170) needs not to be kept in the blockwise accessible storage device (10). This saves storage capacity. |
