| 摘要 |
PURPOSE:To make observation clear of fine structures in bright portions and dark portions by superposing a small fluctuation component included in a certain level range of a picture signal on a picture signal amplified by various magnification depending on the level. CONSTITUTION:A picture signal from an input terminal I is fed into an adding circuit 2 through a filter-level adjusting circuit 3, filter circuit 4, and variable resistor 5. An output of an S-shaped gamma circuit 1 is fed into the adding circuit 2. The filter-level adjusting circuit 3 is adjusted with a level setting means 7 optionally, and this adjusting is operated linking with operation of the level setting means 6 related to the S-shaped gamma circuit 1. |
