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公开(公告)号：US3647295A
公开(公告)日：1972-03-07
申请号：US3647295D
申请日：1970-05-18
Applicant: CROSFIELD ELECTRONICS LTD
Inventor： DOBOUNEY MOUAYED EDOUARD
Abstract: In the reproduction of a colored original red, green and blue filters are used in a photoelectric scanning operation to analyze the color components of the original and corresponding electric signals are generated. To prepare a color printer representing a color which is not complementary to any of the filter colors (for example brown) the primary signals derived by means of the filters are combined in a signal-processing circuit to form further electric signals representing more restricted color ranges. These further signals are used to modify the primary signals so that the modified primary signals are less responsive to those restricted color ranges which are not required for the special color printer. Some at least of the modified primary signals are then combined in a mixer circuit to give a resultant representing the required color printer.
Abstract translation: 在彩色的原始红色的再现中，在光电扫描操作中使用绿色和蓝色滤光片来分析原始的颜色分量，并且产生相应的电信号。 为了制备表示与任何滤色器（例如棕色）不互补的颜色的彩色打印机，通过滤波器导出的主要信号被组合在信号处理电路中以形成更多的电信号，表示更受限制的颜色范围 。 这些进一步的信号用于修改主信号，使得修改的主信号对于特殊彩色打印机不需要的那些限制的颜色范围较不敏感。 然后，一些至少修改的主信号在混合器电路中组合以得到代表所需彩色打印机的结果。
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公开(公告)号：US3600505A
公开(公告)日：1971-08-17
申请号：US3600505D
申请日：1969-11-13
Applicant: CROSFIELD ELECTRONICS LTD
Inventor： DOBOUNEY MOUAYED EDOUARD
CPC classification number: H04N1/60
Abstract: In apparatus for preparing color printer separation, colorcomponent signals derived from an analyzing scanner are colorcorrected before being used to modulate an exposing scanner. To permit better control of the color correction, the correction signals are derived by first applying pairs of uncorrected signals to differencing circuits which generate, for each pair, separate difference signals for differences of opposite polarities. Correction signals representing different restricted color ranges are then formed by adding, for each such restricted color range, an appropriate selection of the difference signals with suitable weighting and passing the resultant only if its polarity is such that an increase in its value corresponds to an increase in the color density of that restricted color range in the original. Finally, each uncorrected color-component signal is corrected with at least one of these correction signals.
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公开(公告)号：US3634611A
公开(公告)日：1972-01-11
申请号：US3634611D
申请日：1969-11-12
Applicant: CROSFIELD ELECTRONICS LTD
Inventor： PUGSLEY PETER C , DOBOUNEY MOUAYED EDOUARD
CPC classification number: H04N1/6027
Abstract: To reproduce colored images, color component signals generated by scanning an original are color corrected and then tone corrected and used to control the exposure of a sensitive surface. ''''Catchlights'''' are reproduced on an extended and nonlinear portion of the tone correction characteristic. To prevent the reproduction on this portion of the characteristic of signals which do not correspond to catchlights but which, through overcorrection in the color correction circuits, have a similar signal level, a catchlight detector circuit is connected in parallel with the color correction circuit so as to receive uncorrected color component signals and to modify the response of the tone correction circuit to a signal from the color correction circuit in the presence of a catchlight signal from the catchlight detector.
Abstract translation: 为了再现彩色图像，通过对原稿进行扫描生成的颜色分量信号进行颜色校正，然后进行色调校正，并用于控制敏感表面的曝光。 在色调校正特性的扩展和非线性部分上再现“Catchlights”。 为了防止在这一部分对不同于聚光灯的信号的特性进行再现，而通过颜色校正电路中的过度校正具有相似的信号电平，将聚光灯检测器电路与彩色校正电路并联连接，以便 接收未校正的颜色分量信号，并且在存在来自聚光灯检测器的聚光灯信号的情况下，修正色调校正电路对来自颜色校正电路的信号的响应。
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