| 摘要 |
An electronic imaging system (10) converts an image stored in a memory (12) to an image (46) having a predetermined location on the screen (42) of a stationary TV monitor (18) whose screen (42) is focused on a stationary film (22) such that the relative position of the image (46) on the TV monitor (18) is the desired location on the film (22). The system includes a digital memory (12) of n syllables of m words for storing a p level representation of an image, and a control circuit (14) having an N-lines per frame raster generator (24) for producing N horizontal synchronization pulses per vertical synchronization pulse defining a frame. Data processing circuitry is responsive to synchronization pulses for converting the n syllables from the memory (12), within the time for vertical synchronization pulses to define a frame and in timed relationship to the horizontal synchronization pulses, into a plurality of video signals, each of which contains m variations and amplitude and represents a line of picture elements of the image (46). The system also includes a TV monitor (18) having a screen (42) on which an electron beam (44) is incident for producing a display, a deflection circuit (38) responsive to the synchronization signals for scanning the screen and producing an N-line raster; and a modulation circuit (48) responsive to the video signals for modulating the intensity of the beam (44) during its scan. Finally, the system includes an optical lens (20) for focusing the screen (42) on a film plane (22). In accordance with the invention, the raster generator (24) of the control circuit (14) has more lines than either the number of syllables or the number of words in a syllable in the digital memory (12). As a consequence of this situation, the picture elements of the image in the memory will occupy only a portion of the screen of the TV monitor (18). |
