| 摘要 |
The enhancing method of horizontal contours in image signal processing system comprises a first order differentiator (10) for differentiating an input image signal, a second order differentiator (20) for differentiating the first order, a limit amplifier (30) for amplification outputting the second order differential output controlled to a fixed level, an absolute value circuit (40), a critical region (50) for selecting the value more than the critical value by inputting the absolute value circuit output, a multiplier (70), a leg part (60) for outputting the input image signal, an adder 980) for outputting the horizontal contour emphasized image signal (52) by adding the reverse signal outputted from (60) and (70). |
