| 摘要 |
A method of generating bit mask data is disclosed. Initially a binary array (46) representative of a bit mask is stored (s4-5). Additionally an array of weighting numbers (48) is stored where each weighting number corresponds to a function indicative of the distances between a position in the stored binary array and the locations of entries of a particular type in the binary array. An entry in the binary array (46) is then (s6-1) selected on the basis of said weighting number corresponding to the entry. The selected entry (s6-3) and the values of the weighting numbers (s6-5) are then modified on the basis of the relative positions in the binary array (46) of the selected entry and the positions of entries in the array of weighting numbers (48). |
