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公开(公告)号：US4954888A
公开(公告)日：1990-09-04
申请号：US309085
申请日：1989-02-06
摘要： The apparatus for reading and digital processing of color images comprises groups of CCD sensing elements for reading the individual pixels forming the image. Each group of the sensing elements is associated with one primary color, for generating corresponding reading signals, which control a color indication circuit generating a color indicatory signal for indicating the presence of any color in the image. The colour indicator signal is derived from a table of zones of colours which is recorded in a ROM and can be addressed by the reading signals of the various colours, input from corresponding reading elements via compensation circuits. The colour signal is capable of controlling second selective scanning of document for recording the reading signals for all the primary colours of the image. The ROM is also capable of providing an indication of the mixture of colours of each pixel, which is compared to a predetermined mask for the purposes of suppressing a particular mixture of colours from the recording.
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2.发明授权Digital image scanning device having an automatic background compensation circuit 失效具有自动背景补偿电路的数字图像扫描装置
公开(公告)号：US4970605A
公开(公告)日：1990-11-13
申请号：US309086
申请日：1989-02-06
CPC分类号： H04N1/403
摘要： The background compensation circuit defines a background threshold signal in dependence on an average value between the positive-peak and negative-peak signals previously received from the elements for scanning the pixels of the image, and in dependence on the analog signal (AS) of the pixel added to a reference signal. The circuit comprises two detectors (21, 22) for respectively detecting a positive peak and a negative peak and which each have a short charge time constant and a long discharge time constant. A summing circuit (25) generates a threshold signal (V.sub.s) as a linear combination of the signals (V.sub.max, V.sub.min) of the detectors (21, 22) the analog signal (AS) of the pixel and a reference signal (V.sub.r). Finally the threshold signal is compared (26) to the analog signal (AS) of the pixel to produce a binary reading signal which is at "one" level when the threshold signal is greater than the analog signal and is at "zero" level when the threshold signal is less than the analog signal.
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公开(公告)号：US4549222A
公开(公告)日：1985-10-22
申请号：US471349
申请日：1982-03-02
申请人： Giuseppe Fogaroli , Giuseppe Coli
发明人： Giuseppe Fogaroli , Giuseppe Coli
IPC分类号： B41J2/44 , B41J2/485 , B41J2/505 , G03G15/22 , G06K15/12 , H04N1/04 , H04N1/113 , H04N1/23 , H04N1/387 , B41J3/21
CPC分类号： B41J2/5056 , G06K15/128 , H04N1/0402 , H04N1/0411 , H04N1/0414 , H04N1/0426 , H04N1/0446 , H04N1/1135
摘要： The method enables images recorded with different definitions to be printed by the same printer, and the information to be printed with maximum print definitions. For this purpose, the print definitions (dots per mm) is a common multiple of the possible recording definitions. The information to be printed is extracted from a signal generator with a frequency corresponding to the recording definition, and is repeated in accordance with the multiple. For example with a print definition of 24 dots/mm defined by a row and column grid L1, L2, etc., C1, C2, etc., a character definition of 8 dots/mm is obtained by printing each dot three times in each row and repeating each row a further two times. The printer, which is therefor suitable for various purposes, for example as a word processor printer and as a facsimile printer, repeatedly prints each dot, along the horizontal and/or along the vertical, for a number of times corresponding to the multiple, to provide a line continuity and an improved image resolution. The printer used may be of electrophotographic type, with the printing element provided by a laser generator.
摘要翻译： 该方法可以使用不同定义录制的图像由相同的打印机打印，以及要打印的信息具有最大的打印定义。 为此，打印定义（每毫米点数）是可能记录定义的通用倍数。 要从具有对应于记录定义的频率的信号发生器提取要打印的信息，并且根据倍数重复。 例如，通过由行和列网格L1，L2等，C1，C2等定义的24点/ mm的打印定义，通过在每个点中打印每个点三次来获得8点/ mm的字符定义 行和每行重复两次。 适用于各种目的的打印机例如作为文字处理器打印机和作为传真打印机，沿着水平和/或沿着垂直方向重复地打印每个点多次，对应于该多个，多次， 提供线路连续性和改进的图像分辨率。 使用的打印机可以是电子照相式的，其中打印元件由激光发生器提供。
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公开(公告)号：US4683501A
公开(公告)日：1987-07-28
申请号：US783352
申请日：1985-10-03
申请人： Ugo Carena , Giuseppe Coli , Giuseppe Fogaroli
发明人： Ugo Carena , Giuseppe Coli , Giuseppe Fogaroli
CPC分类号： H04N1/0671 , H04N1/03 , H04N1/06 , H04N1/1911 , H04N2201/02429 , H04N2201/02431 , H04N2201/02462 , H04N2201/0442
摘要： A device for reading graphic symbols impressed on a sheet, comprising light sources for illuminating the sheet, an optical reading system and an array of photo-electric sensors for generating electrical reading signals. The device is compact in structure and of small dimensions, so as to allow it to be mounted upon the head-carrying carriage of a printing machine or typewriter. The device makes it possible to create, in a particularly simple form, reading apparatus for facsimiles or for optical character recognition (OCR) reading apparatus for memorizing signatures, graphical symbols and drawings or mathematical symbols, or apparatus for copying documents.
摘要翻译： 用于读取印在片材上的图形符号的装置，包括用于照射片材的光源，光学读取系统和用于产生电子读取信号的光电传感器阵列。 该装置结构紧凑，尺寸小，以便将其安装在印刷机或打字机的头架上。 该装置可以以特别简单的形式创建用于传真机的读取装置或用于存储签名，图形符号和附图或数学符号的光学字符识别（OCR）读取装置或用于复制文档的装置。
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