| 摘要 |
PURPOSE:To independently extract an arbitrary gradation level at every plural windows so that the gradation level of an object to be brought to image pickup can be recognized more exactly by bringing a gradation signal of the object to be brought to image pickup to A/D conversion, and generating a gradation table extracted at every window at a prescribed address interval. CONSTITUTION:A gradation signal of an object to be brought to image pickup inputted from a camera 1 being a gradation input means is amplified by amplifiers 2a - 2c, replaced with a digital signal by A/D converters 3a - 3c, and stored in an image memory 4. Subsequently, a table for extracting independently an arbitrary gradation against plural pieces of windows which are set in one screen in table memories 6a - 6c is generated at a prescribed address interval, and a gradation signal for showing a gradation level of the object to be brought to image pickup is outputted. In such a way, the gradation level of the object to be brought to image pickup can be understood and recognized exactly even under the condition of any background. |
