| 摘要 |
PURPOSE:To stably recognize an object by setting evenly the sample holding output signals at a common control level in plural monitor areas for an object to be observed. CONSTITUTION:The video input signals VD received from plural monitor areas are samples held by main bodies SH1-16 of a sample holding circuit 23. Each of bodies SH1-16 has a simple constitution including a CR integration circuit, etc., and these bodies SH1-16 have variance of characteristics. Therefore the signals VD received from each monitor area of a standard object (master) are successively sampled held previously by the bodies SH1-16 and then fetched by a CPU via a gain control circuit GCON. Then the coefficient data PARA is calculated to that the each luminance data is equal to the fixed value and stored in a RAM. When the luminance data on each monitor area for the object to be observed is fetched by the CPU, the CPU feeds the corresponding data PARA back to the circuit GCON to control them at a common level. Thus the object is stably recognized. |
