| 摘要 |
PURPOSE:To store a binary data with fidelity to an original at all times to an RAM through serial parallel conversion, by producing a threshold value with a video signal for a prescribed period outputted from a solidstate image sensor. CONSTITUTION:A timing counter 15 counts a clock (a) inputted usually, opens a gate G1 every prescribed value, produces an output c and outputs a corresponding signal d from a line synchronizing flag 18 to a slidstate scanning element 11 and gives interruption to a CPU. The video signal outputted from the element 11 is outputted to a binary circuit 12 according to a shift lock. After this signal binarized at a comparison circuit 122 based on the threshold value from a threshold value generating circuit 121, it is converted into a parallel 8-bit data via a serial parallel conversion register 13 and a tri-state buffer 14, and the video data for one line's share is stored in an RAM5 in parallel every 8-bit according to the read strobe signal g outputted from the CPU. |
