公开(公告)号：US4941746A

公开(公告)日：1990-07-17

申请号：US132521

申请日：1987-12-14

申请人： Frank A. Hull ,  H. Brent Archer ,  Curt Frederick

发明人： Frank A. Hull ,  H. Brent Archer ,  Curt Frederick

IPC分类号： G01N21/59

CPC分类号： G01N21/5911 ,  G01N2021/5957

摘要： An automatic scanning densitometer which is self calibrating and accurately measures highlight density, shadow density and tonal distribution of midtones occurring in the subject matter of the photograph to be reproduced. A reflection densitometer is disclosed which in one or more scans identifies and measures first the highlight and shadow densities and the tonal distribution of the subject matter to be reproduced, as opposed to the background of the photo. The instrument automatically determines the size of the original and, with an input to the device, the size of the window in which the original is to be reproduced to provide enlargement or reduction. Measurement of density values are uniquely stabilized and with the use of a monolithic sensor on a single substrate the entire image is processed and measured, not just target areas which must be manually measured or aligned with an apertured scanning bar. Using plant press data as an input to the system, all values for a near perfect reproduction are rapidly displayed by the device and can be printed or can be used as an input for an exposure computer to automate the graphic arts reproduction process.

摘要翻译： 自动扫描光密度计，可自动校准，准确测量要再现的照片主题中出现的中音的突出浓度，阴影密度和色调分布。 公开了一种反射密度计，其在一次或多次扫描中，与照片的背景相反，识别并测量要再现的主题的高光和阴影密度以及色调分布。 仪器自动确定原稿的尺寸，并通过设备的输入，将要复制原稿的窗口的大小以提供放大或缩小。 密度值的测量是唯一稳定的，并且在单个基板上使用单片传感器，整个图像被处理和测量，而不仅仅是必须手动测量或与有孔扫描条对准的目标区域。 使用植物印刷机数据作为系统的输入，用于近乎完美再现的所有值被设备快速显示，并且可以被打印，或者可以用作曝光计算机的输入以使图形艺术再现过程自动化。

公开(公告)号：US1843222A

公开(公告)日：1932-02-02

申请号：US42442730

申请日：1930-01-29

申请人： CURT FREDERICK REIS

发明人： HARLEY THOMAS J

IPC分类号： H02K1/27

CPC分类号： H02K1/2706