Image reading apparatus for reducing color differences
    7.
    发明授权
    Image reading apparatus for reducing color differences 失效
    用于减少色差的图像读取装置

    公开(公告)号:US06225934B1

    公开(公告)日:2001-05-01

    申请号:US09122445

    申请日:1998-07-24

    IPC分类号: H03M112

    CPC分类号: H04N1/56

    摘要: This invention provides an image reading method and apparatus which can prevent a large difference from being produced between the color tones of the read image and the original image. A plurality of signals output from an image sensor (101) are A/D-converted into a plurality of digital signals by A/D conversion circuits (105), a predetermined one of the A/D-converted digital signals is compared with a predetermined reference level by a comparator (108), a low-pass filter (109) removes any high-frequency component from the comparison result, and the output from the low-pass filter (109) is controlled to be input to the A/D conversion circuits (105) as a reference voltage for determining the input range of each A/D conversion circuit (105).

    摘要翻译: 本发明提供一种可以防止在读取图像的色调和原始图像之间产生较大差异的图像读取方法和装置。 从图像传感器(101)输出的多个信号由A / D转换电路(105)进行A / D转换成多个数字信号,将A / D转换的数字信号中的预定的一个与 通过比较器(108)的预定参考电平,低通滤波器(109)从比较结果中去除任何高频分量,并且控制来自低通滤波器(109)的输出以输入到A / D转换电路(105)作为用于确定每个A / D转换电路(105)的输入范围的参考电压。

    Image processing apparatus for converting a color image into a pattern
image with a line having a width which is equal to or less than a
predetermined width not being converted
    9.
    发明授权
    Image processing apparatus for converting a color image into a pattern image with a line having a width which is equal to or less than a predetermined width not being converted 失效
    图像处理装置,用于将彩色图像转换成具有宽度等于或小于未被转换的预定宽度的线的图案图像

    公开(公告)号:US5691827A

    公开(公告)日:1997-11-25

    申请号:US433201

    申请日:1995-05-02

    IPC分类号: H04N1/40 H04N1/405 H04N1/56

    CPC分类号: H04N1/40093 H04N1/40012

    摘要: An image processing apparatus for converting color images into monochromatic pattern images. The image processing apparatus includes: means for detecting the area of a color image; means for converting a color image into a monochromatic pattern image; and control means for varying such image processing in accordance with the result of detection made by the means for detecting the area. When a thin line is detected in a color area, the method of processing is determined based on the width of the detected thin line. For example, when the width of the thin line is smaller than a predetermined value, the area of such thin line may be outputted as a plain image instead of a pattern image so that it may easily be seen or recognized. The contour of a color area may be made conspicuous by combining a plain image and a pattern image.

    摘要翻译: 一种用于将彩色图像转换成单色图案图像的图像处理装置。 图像处理装置包括:用于检测彩色图像的区域的装置; 用于将彩色图像转换为单色图案图像的装置; 以及用于根据用于检测该区域的装置进行的检测结果来改变这种图像处理的控制装置。 当在颜色区域中检测到细线时,基于检测到的细线的宽度来确定处理方法。 例如,当细线的宽度小于预定值时,可以将这种细线的面积作为平面图像而不是图案图像输出,以便容易地看到或识别。 可以通过组合平面图像和图案图像来使颜色区域的轮廓变得显眼。

    Image reading apparatus
    10.
    发明授权
    Image reading apparatus 失效
    图像读取装置

    公开(公告)号:US08320029B2

    公开(公告)日:2012-11-27

    申请号:US12791638

    申请日:2010-06-01

    申请人: Masafumi Kamei

    发明人: Masafumi Kamei

    IPC分类号: H04N1/04

    摘要: When an original conveying unit that rotates about a rotation center 901 reaches an opening angle 906, an image is read using a line sensor, and a detected object is determined as being white dust on a platen glass. When it further reaches an opening angle 908, an image is again read using the line sensor, and a detected object is determined as being black dust on the platen glass. When it further reaches an opening angle 910, an image is again read using the line sensor, and a detected object is determined as being dust on a reference white plate with which the original conveying unit is provided in a state of facing a reading position where the line sensor performs reading.

    摘要翻译: 当围绕旋转中心901旋转的原稿传送单元达到打开角度906时,使用线传感器读取图像,并且检测对象被确定为台板玻璃上的白色灰尘。 当进一步达到打开角度908时,使用线传感器再次读取图像,并且检测对象被确定为稿台玻璃上的黑色灰尘。 当进一步达到打开角度910时,使用线传感器再次读取图像,并且检测对象被确定为在面向读取位置的状态下在原始输送单元处设置的参考白板上的灰尘, 线传感器执行读取。