| 摘要 |
A telecine can be adapted to write video signals onto film. The film gate and flying spot scanner (12) are enclosed in a light tight shield (30) and an R, G, B clear, colour filter wheel (134) is interposed in the optical path (34) between the scanner and the imaging optics (113). The CRT grid is modulated sequentially by R, G, and B components of the video signals which are preprocessed for shading and colour errors. The film may be scanned a number of times under the modulation of each component, displaced in both X and Y directions to increase resolution. In a preferred embodiment the scan is displaced by a 1/4 pixel for each of four scans to increase horizontal resolution and, for each displacement, four scans are performed each 1/4 line spacing apart to increase vertical resolution. Thus, each frame is scanned 16 times per colour component, and 48 times in all. |
