| 摘要 |
<p>PHN. 89660 17-4-1978 A combined gamma and aperture or contour correction circuit for the picture signal in a television camera, the aperture correction signal having signal values which are negative and positive-going relative to a reference value being split into a negative and a positive aperture correction signal. The positive correction signal is added to the picture signal before gamma correction and the negative correction signal after the gamma correction. The result is an improved aperture and contour correct ion, respectively, and less noise in the contours in the darker picture portions.</p> |
