| 摘要 |
PURPOSE:To execute the image reconstitution processing at a high speed by raising the cost only a little by installing plural pieces of subordinate arithmetic parts for calculating actually a weight coefficient against one high-order arithmetic part having a function memory and a constant memory. CONSTITUTION:A coefficient generating part 1 is constituted of a main coefficient calculating part 5, and plural sub-coefficient calculating parts (4-1)-(4-n). The main coefficient calculating part 5 consists of a constant memory 6, a function memory 7, and a controller 8, and the constant memory 6 stores data related to a projection angle. Also, the function memory 7 stores in advance a function used at the time of calculating a weight coefficient. The controller 8 controls an output to the sub-coefficient calculating parts (4-l)-(4-n) from the constant memory 6 and the function memory 7. The sub-coefficient calculating parts (4-1)-(4-n) calculate the weight coefficient simultaneously and in parallel from the data related to the projection angle given from the constant memory 6 and the function given from the function memory 7. Accordingly, the operation of the weight coefficient can be executed at a high speed, and also, since the number of expensive constant memories 6 and function memories 7 is not increased, the device can be constituted at a low cost. |
