| 摘要 |
An electronic printing method by which originals are photographically reproduced by exposing high-contrast copy material with an intensity modulated illumination source that coarsely scans the original while the original is sharply imaged with a well-cor-rected optical system. The source intensity is modulated to compensate for the original's tonal qualities and electronically shapes the response of the copy material to enhance tonal reproduction. The imaging system in conjunction with the high-contrast material assures high reproduction of detail. The method enhances copy sharpness and reduces copy time, memory and computational needs otherwise required for copies of comparable quality. |
