| 摘要 |
PURPOSE: To effectively remove an impulse noise and a Gaussian noise, and to suppress a step edge phenomenon by operating double smoothing constituted of median filtering, censoring, and OSF for an interlacing scanning signal, and converting it into a progressive scanning signal. CONSTITUTION: An interlacing scanning signal XK having noise components is processed by a double smoothing part 30 and an interlacing/progressive converting part 40. At first, a bias error depending on the size of a noise power and a signal edge is permitted so that the edge of the signal XK can be prevented from being damaged by using media filters 31 and 35 in the double smoothing part 30. Then, a smoothing filter in which censoring parts 32 and 36 are connected with OSF 33 and 38 is used. At that time, the censored pixel data are aligned in the order of the size by the OSF parts 33 and 38, and weight is added to each pixel data so that the smoothing of remaining noise components can be attained. |
