| 摘要 |
PURPOSE:To simplify the constitution and also to increase the processing speed with a histogram calculation system by calculating approximately the overall histogram by applying the processing to only half the entire data. CONSTITUTION:A flip-flop 1 divides a pixel clock into half and switches the clock divided into half by gates 2-15 and its inverted clock in both ODD and EVEN fields. In the ODD field the data on the 1st, 3rd, 5th, 7th... columns are latched by a register 6. While in an EVEN field the data on the 2nd, 4th, 6th, 8th... columns are latched. The data latched by the register 6 are supplied to the addresses of a memory 8 and these data corresponding to addresses are read out of the memory 8 and latched by a register 9. Then the data latched by the register 9 are latched by a register 11 through an adder 10 which increases data by a piece and then written again to the original addresses.
|
