| 摘要 |
PURPOSE:To detect a suitable exposure quantity by reading successively and repeatedly the contents of the store of an optic RAM based on the address designating signal and executing the calculation processing of the suitable exposure quantity. CONSTITUTION:The contents of the store of an optic RAM2 are read by a row address signal RAS, a column address signal CAS and a writing signal WRT stipulated in a table memory 1 beforehand, the number of white points are counted, when an address counter of the table memory 1 comes to zero, an RS flip-flop 4 is reset in accordance with the output from a NOR gate 9. The completing signal is given through a line (l)17 to a CPU. Thus, the reading and scanning of an optic RAM2 are completed. After scanning is completed, the CPU reads the number of white points, the high speed scanning of the table memory 1 is repeatedly executed until it reaches the prescribed number, and thereafter, scanning is executed from one 1FFF, and the picture data are obtained. |
