Color converting circuit for use in an image forming apparatus
    2.
    发明授权
    Color converting circuit for use in an image forming apparatus 失效
    用于图像形成装置的颜色转换电路

    公开(公告)号:US5539539A

    公开(公告)日:1996-07-23

    申请号:US26591

    申请日:1993-03-05

    IPC分类号: G03F3/08 H04N1/60

    CPC分类号: H04N1/60

    摘要: 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.

    摘要翻译: 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。

    Enlargement and reduction apparatus for an image forming apparatus
    3.
    发明授权
    Enlargement and reduction apparatus for an image forming apparatus 失效
    用于图像形成装置的放大和缩小装置

    公开(公告)号:US5764370A

    公开(公告)日:1998-06-09

    申请号:US373389

    申请日:1995-01-17

    CPC分类号: H04N1/3935

    摘要: An image forming apparatus is provided with a zoom processing circuit, a scanning optical system and an enlarging/reducing circuit. The enlargement/reduction of the formed image in the main scanning direction is performed by the zoom processing circuit and an enlarging/reducing circuit, and the enlargement/reduction in the sub scanning direction is performed by the scanning speed of the scanning optical system and the enlarging/reducing circuit. When a magnification within a magnification range depending on the zoom processing circuit and the scanning optical system is specified, the enlargement/reduction of the input image data by the enlarging/reducing circuit is not performed.

    摘要翻译: 图像形成装置设置有变焦处理电路,扫描光学系统和放大/缩小电路。 通过变焦处理电路和放大/缩小电路进行主扫描方向上形成的图像的放大/缩小,并且通过扫描光学系统的扫描速度和副扫描方向的放大/缩小来执行副扫描方向的放大/缩小 放大/缩小电路。 当指定根据变焦处理电路和扫描光学系统的倍率范围内的放大率时,不执行放大/缩小电路对输入图像数据的放大/缩小。

    Image forming apparatus and gradation output adjusting method in image
forming apparatus
    4.
    发明授权
    Image forming apparatus and gradation output adjusting method in image forming apparatus 失效
    图像形成装置和图像形成装置中的灰度输出调整方法

    公开(公告)号:US5754683A

    公开(公告)日:1998-05-19

    申请号:US343933

    申请日:1994-11-29

    CPC分类号: H04N1/6033

    摘要: 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.

    摘要翻译: 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。

    Electrographic copying machine
    5.
    发明授权
    Electrographic copying machine 失效
    电子复印机

    公开(公告)号:US5642201A

    公开(公告)日:1997-06-24

    申请号:US348204

    申请日:1994-11-28

    CPC分类号: H04N1/028

    摘要: An electrographic copying machine in which an image projected on an original glass stand by a film projector is read out by a scanner and copied is provided with a color scanner including a CCD for reading out a projected image, a smoothing processing unit for averaging the tone data of pixels outputted from the color scanner every four pixels, a difference value totaling unit for totaling the difference values between the averaged tone data, and a control unit for performing focusing of the film projector so that the total of the difference values is maximum. The focusing of the projected image is automatically performed.

    摘要翻译: 一种电子照相复印机,其中通过扫描仪读出由投影仪投影在原稿玻璃架上的图像,并且复印设置有包括用于读出投影图像的CCD的彩色扫描仪,用于对色调进行平均的平滑处理单元 每四个像素从彩色扫描器输出的像素的数据,用于将平均色调数据之间的差值相加的差值合计单元和用于进行胶卷投影仪的聚焦的控制单元,使得差值的总和最大。 自动执行投影图像的对焦。

    Apparatus and method for correcting color image data according to a
masking equation
    6.
    发明授权
    Apparatus and method for correcting color image data according to a masking equation 失效
    根据掩蔽方程校正彩色图像数据的装置和方法

    公开(公告)号:US5398109A

    公开(公告)日:1995-03-14

    申请号:US847936

    申请日:1992-03-06

    IPC分类号: H04N1/60 G03G15/01

    CPC分类号: H04N1/6019

    摘要: In a color correcting method for use in a color image forming apparatus, color image data are calculated and then corrected by solving a masking equation by allotting the tone number of input image data according to the value of each coefficient of reflection density of each of three primary colors in the masking equation.

    摘要翻译: 在用于彩色图像形成装置的颜色校正方法中,通过根据三个反射密度的每个系数的值分配输入图像数据的色调数求解屏蔽方程,来计算彩色图像数据,然后进行校正 屏蔽方程中的原色。

    Color image forming apparatus having mono-color image forming function
    7.
    发明授权
    Color image forming apparatus having mono-color image forming function 失效
    具有单色图像形成功能的彩色图像形成装置

    公开(公告)号:US5307135A

    公开(公告)日:1994-04-26

    申请号:US843277

    申请日:1992-02-28

    CPC分类号: H04N1/40012

    摘要: This invention relates to a color image forming apparatus which is capable of forming a mono-color image based on the color image input data. The apparatus includes a circuit for determining the highest value of the image input data. This circuit is called the highest value image data outputting circuit. The highest input color data value is found by comparing the values of the image data for the three primary colors (yellow, magenta and cyan) and outputting the value for the color having the highest input value. The apparatus further includes a mono-color image forming portion which forms a mono-colored image based on the output of the highest value image data outputting circuit.

    摘要翻译: 本发明涉及能够基于彩色图像输入数据形成单色图像的彩色图像形成装置。 该装置包括用于确定图像输入数据的最高值的电路。 该电路称为最高值图像数据输出电路。 通过比较三原色(黄色,品红色和青色)的图像数据的值并输出具有最高输入值的颜色的值来找到最高的输入颜色数据值。 该装置还包括基于最高值图像数据输出电路的输出形成单色图像的单色图像形成部分。

    Copying system with a dual trunk serial communication system using an
acknowledge line
    8.
    发明授权
    Copying system with a dual trunk serial communication system using an acknowledge line 失效
    使用确认线复制双中继串行通信系统

    公开(公告)号:US5163137A

    公开(公告)日:1992-11-10

    申请号:US523281

    申请日:1990-05-11

    IPC分类号: G06F13/42

    CPC分类号: G06F13/4269

    摘要: 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.

    摘要翻译: 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。

    Photoconductive drum device for electrostatic copying machines or the
like
    10.
    发明授权
    Photoconductive drum device for electrostatic copying machines or the like 失效
    用于静电复印机等的感光鼓装置

    公开(公告)号:US4659206A

    公开(公告)日:1987-04-21

    申请号:US737611

    申请日:1985-05-23

    CPC分类号: G03G15/751

    摘要: A photoconductive drum device for electrostatic copying machines or the like includes a temperature maintaining heater bent to a cylindrical form and accommodated in the main body of a photoconductive drum. The heater is constructed with a base plate and a heat generator attached to the base plate. The base plate has a parallelogrammatic form substantially corresponding to a shape which is obtained by cutting a hollow cylinder, having a diameter approximate to the inside diameter of the drum main body, along a helical cut line and unbending the cylinder.

    摘要翻译: 用于静电复印机等的感光鼓装置包括弯曲成圆柱形并且容纳在感光鼓的主体中的温度维持加热器。 加热器构造有底板和附接到基板的发热体。 基板具有基本上对应于通过沿着螺旋切割线切割具有近似于滚筒主体的内径的直径的中空圆筒并且使圆筒不弯曲而获得的形状的平行四边形形式。