| 摘要 |
<p>PURPOSE:To shorten a processing time by sending the address data of a changing point, which are stored in a memory when picture data are ended to be fetched, to a processing system side. CONSTITUTION:When a line switching signal is inputted each time the reading of respective lines is ended, a dot counter 15 is set to initial data. This line switching time is utilized and a local CPU in a scanner interface 7 stores both changing point data in a FIFO16 and present line data to a local memory 17. After the data of all the lines are ended to be fetched, the data to be stored in the memory 17 are transferred to the system side, namely, to a system memory 3 and used as the data for vector operation of a CPU2. Thus, the processing time to convert a data base to vector data is shortened and the burden of the CPU, etc., can be reduced.</p> |
