Optical reader having apparatus for discrimination between dither-matrix
and non-dither-matrix reading areas, and/or means for determining light
emitter drive power values by using reference reflector surface
    1.
    发明授权
    Optical reader having apparatus for discrimination between dither-matrix and non-dither-matrix reading areas, and/or means for determining light emitter drive power values by using reference reflector surface 失效
    具有用于辨别抖动矩阵和非抖动矩阵读取区域的装置的光学读取器和/或通过使用参考反射器表面来确定光发射器驱动功率值的装置

    公开(公告)号:US5016117A

    公开(公告)日:1991-05-14

    申请号:US285854

    申请日:1988-12-16

    IPC分类号: H04N1/40

    CPC分类号: H04N1/40062 H04N1/40056

    摘要: An optical reading including a device for effecting discrimination between a dither-matrix reading area and a non-dither-matrix reading area on a subject copy, an irradiating device for irradiating local segments of the subject copy with light beams having different intensities, a reading device for obtaining image data representative of the presence or absence of an achromatic tone in each local segment based on an amount of the light beam reflected by each local segment, a control device for operating the irradiating and reading devices to irradiate the local segments in a predetermined discriminating zone of the subject copy with the light beams having different intensities at different times, to obtain first and second image data, a device for comparing the first and second image data of each local segment in the discrimination zone, to determine whether the first and second image data agree with each other or not for each local segment, and a device for determining that the discrimination zone is the dither-matrix reading area, if a degree of disagreement of the first and second image data exceeds a predetermined reference value, and determining that the discrimination zone is the non-dither-matrix reading area, if the degree of disagreement does not exceed the reference value.

    摘要翻译: 一种光学读取装置,其特征在于,包括用于对被检体进行抖动矩阵读取区域和非抖动矩阵读取区域之间的区别的装置,照射装置,用于照射具有不同强度的光束的被检体拷贝的局部区段, 用于基于每个局部段反射的光束的量获得表示每个局部段中存在或不存在无彩色色调的图像数据的装置,用于操作照射和读取装置以照射局部区段中的局部区段的控制装置 在不同时刻具有不同强度的光束的被摄体副本的预定识别区域,以获得第一和第二图像数据;用于比较识别区域中的每个局部区段的第一和第二图像数据的装置,以确定第一和第二图像数据 并且第二图像数据彼此一致或不适用于每个本地段,以及用于确定该discri的设备 如果第一和第二图像数据的不一致程度超过预定参考值,并且确定鉴别区域是非抖动矩阵读取区域,则如果不一致程度确定 不超过参考值。

    Optical image reading apparatus capable of reading multi-colored original
    2.
    发明授权
    Optical image reading apparatus capable of reading multi-colored original 失效
    能够读取多色原版的光学图像读取装置

    公开(公告)号:US5021877A

    公开(公告)日:1991-06-04

    申请号:US260281

    申请日:1988-10-20

    IPC分类号: H04N1/028 H04N1/48 H04N1/46

    CPC分类号: H04N1/484 H04N1/0281

    摘要: An optical image reading apparatus for photoelectrically reading images formed in at least two colors on a surface of an original having a base color different from the at least two colors, including a first reading device for obtaining a first image signal for each of a multiplicity of reading spots in a predetermined area on the original. The first image signal has two different levels one of which corresponds to the base color and the other of which corresponds to the at least two colors. The apparatus further includes a second reading device for obtaining a second image signal for the each reading spot. The second image signal cooperates with the first image signal to discriminate each of the at least two colors from the other of the at least two colors. Provisions are made for determining whether the levels of the first image signals for all of the multiplicity of reading spots are equal to the above-indicated one level corresponding to the base color, or not. If so, the second reading device is inhibited from operating to obtain the second inage signal for each reading spot.

    摘要翻译: 一种光学读取装置,用于对具有不同于至少两种颜色的基本颜色的原件表面上的至少两种颜色形成的图像进行光电读取,该第一读取装置包括用于获得第一图像信号, 在原来的预定区域读取点。 第一图像信号具有两个不同的级别,一个对应于基色,另一个对应于至少两种颜色。 该装置还包括用于获得每个读取点的第二图像信号的第二读取装置。 所述第二图像信号与所述第一图像信号协作以将所述至少两种颜色中的每一种与所述至少两种颜色中的另一种进行区分。 进行用于确定所有多个读取点的第一图像信号的电平是否等于对应于基色的上述一个电平的规定。 如果是这样,则禁止第二读取装置操作以获得每个读取点的第二个入口信号。