发明名称 |
Production of printing blocks or forms |
摘要 |
This invention relates to the production of a printing block or form of the kind in which at least one original is scanned optoelectronically to obtain image signals being mixed to generate a composite signal and is recorded as the printing block or form, one of the image signal which is to be mixed being modulated by a control signal and the other image signal being modulated by the amplitude-inverted control signal and the modulated image signals being summated to obtain said desired composite signal, said control signal determining a mixing range and the mixing characteristic within said mixing range. According to the invention, the said control signal is derived from the color information of a colored control mask by scanning said mask or from the image content of the original.
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申请公布号 |
US4293872(A) |
申请公布日期 |
1981.10.06 |
申请号 |
US19790059214 |
申请日期 |
1979.07.20 |
申请人 |
DR.-ING. RUDOLF HELL GMBH |
发明人 |
KELLER, HANS;KNOP, HANS-GEORG |
分类号 |
H04N5/265;G03F3/08;H04N1/387;H04N1/60;H04N1/62;(IPC1-7):H04N1/38 |
主分类号 |
H04N5/265 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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