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    • 1. 发明授权
    • Color converting circuit for use in an image forming apparatus
    • 用于图像形成装置的颜色转换电路
    • US5539539A
    • 1996-07-23
    • US26591
    • 1993-03-05
    • Masaya FujimotoKatsumi AmakawaRyuichi OkumuraHaruo YamamotoToshio Watanabe
    • Masaya FujimotoKatsumi AmakawaRyuichi OkumuraHaruo YamamotoToshio Watanabe
    • G03F3/08H04N1/60
    • H04N1/60
    • The average value of each of yellow, magenta and cyan color image data of a color-to-be-converted which data are obtained at the time of pre-scanning of a copying machine and stored in memories, respectively, is calculated, and then, predetermined set values are respectively added to and subtracted from the calculated average values of yellow, magenta and cyan to obtain upper and lower limit values of the conversion range. When the lower limit value obtained by subtraction is below a predetermined lower limit restriction value, the lower limit restriction value is set as the lower limit value of the conversion range. With this feature, when an extremely pale color is specified as a color-to-be-converted in a region other than a background portion of a color original where no letters, etc. are printed, the color of the background portion is not converted together with the specified color.
    • 计算分别在拷贝机的预扫描时分别获得并存储在存储器中的数据的待转换颜色的黄色,品红色和青色图像数据的平均值,然后 ,从计算出的黄色,品红色和青色的平均值分别添加预先设定的值,并从计算出的平均值中减去预定的设定值,得到转换范围的上限值和下限值。 当通过减法获得的下限值低于预定下限限制值时,将下限限制值设定为转换范围的下限值。 利用该特征,当在除了没有字母等的彩色原稿的背景部分之外的区域中指定非常浅的颜色作为要转换的颜色时,背景部分的颜色不被转换 连同指定的颜色。
    • 4. 发明授权
    • Image forming apparatus and gradation output adjusting method in image
forming apparatus
    • 图像形成装置和图像形成装置中的灰度输出调整方法
    • US5754683A
    • 1998-05-19
    • US343933
    • 1994-11-29
    • Syuji HayashiMasaya FujimotoKatsumi AmakawaKoji NakamuraHaruo Yamamoto
    • Syuji HayashiMasaya FujimotoKatsumi AmakawaKoji NakamuraHaruo Yamamoto
    • H04N1/407G06T5/00H04N1/60H04N1/46G03F3/08G06K9/00
    • H04N1/6033
    • In a gradation output adjusting method according to the present invention, a gradation correcting section 64 corrects a gradation value of input data in accordance with a predetermined gradation correcting curve and applies the data after the correction to a printer output section 66. In preparing a gradation correcting curve, test data for forming a gradation scale is inputted to the printer output section 66 from a CPU 70. An image corresponding to the test data is read by a scanner section 1. A proper gradation value to be applied to the printer output section 66 is found with respect to some gradation values of the input data on the basis of the result of the reading. A pre-gradation correcting curve is prepared on the basis of the proper gradation value. The pre-gradation correcting curve and a plurality of types of curve patterns previously stored in a ROM 72 are matched. A curve pattern which is best matched to the pre-gradation correcting curve is set as a detailed gradation correcting curve. Since the pre-gradation correcting curve and the curve pattern are matched to set the gradation correcting curve, therefore, the amount of operation may be small and processing time is reduced.
    • 在根据本发明的灰度输出调整方法中,灰度校正部分64根据预定灰度校正曲线校正输入数据的灰度值,并将校正后的数据应用于打印机输出部分66.在准备渐变 校正曲线,用于形成灰度级的测试数据从CPU70输入到打印机输出部分66.与扫描器部分1相对应的与测试数据对应的图像。要应用于打印机输出部分的适当灰度值 关于输入数据的一些灰度值,基于读取结果找到66。 基于适当的灰度值准备预分级校正曲线。 匹配预先灰度校正曲线和预先存储在ROM72中的多种类型的曲线图案。 将与灰度级前校正曲线最佳匹配的曲线图案设定为详细的灰度校正曲线。 由于预分级校正曲线和曲线图案匹配以设置灰度校正曲线,因此,操作量可能较小并且处理时间减少。
    • 8. 发明授权
    • Copying system with a dual trunk serial communication system using an
acknowledge line
    • 使用确认线复制双中继串行通信系统
    • US5163137A
    • 1992-11-10
    • US523281
    • 1990-05-11
    • Haruo YamamotoKatsumi Amakawa
    • Haruo YamamotoKatsumi Amakawa
    • G06F13/42
    • G06F13/4269
    • An interface system for a copying system, wherein a frame of transmission data employing a serial communication between a copying machine main body and peripheral devices thereof comprises an address block, a data block and a checksum data block, an optional device corresponding to an address transmitted from the main body transfers data to the main body when the data received coincides with checksum data obtained in the device based on the received data and the transfer of the data is complete when the main body confirms that the transmission address coincides with the transferred data, and when the transferred data is not returned from the optional device or the coincidence is not confirmed, it is determined that a transmission error occurs and data is transmitted from the main body again, whereby reliability of transmission is improved.
    • 一种用于复制系统的接口系统,其中采用复印机主体及其外围设备之间的串行通信的传输数据帧包括地址块,数据块和校验和数据块,对应于发送的地址的可选设备 当主体确认发送地址与传送的数据一致时,当接收到的数据与基于接收到的数据的设备中获得的校验和数据一致时,主体传送数据到主体,并且数据的传送完成, 并且当传送的数据没有从可选设备返回或者一致未被确认时,确定发送错误发生,并且再次从主体发送数据,从而提高了传输的可靠性。