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23 条记录 (耗时 0.016 秒)

    Image processing apparatus
    3.
    发明公开
    Image processing apparatus 失效

    公开(公告)号：EP0382581A3

    公开(公告)日：1991-10-16

    申请号：EP90301476.9

    申请日：1990-02-12

    申请人： CANON KABUSHIKI KAISHA

    发明人： Yamada, Yasuhiro ,  Tanioka, Hiroshi

    IPC分类号： H04N1/40

    CPC分类号： H04N1/40087 ,  H04N1/4052

    摘要： There is provided an image processing apparatus such as facsimile apparatus or digital copying machine for digitizing image data into two values or multi-values. The apparatus comprises: an input device to input data of a target pixel to be digitized; a calculating circuit to obtain an average density value of a predetermined region; a digitizing circuit such as a binarizing circuit for digitizing or binarizing the target pixel data on the basis of the average density value obtained by the calculating circuit; and a correction circuit to correct a difference which occurs upon digitization by the digitizing circuit. The calculating circuit calculates the average density value mi of the predetermined region when the target pixel data was binarized to 1 and the average density value m 2 of the predetermined region when the target pixel data was binarized to 0 by using a predetermined weighting mask. The digitizing circuit binarizes the target pixel data by using (m 1 + m 2 )/2 as a threshold value. When the difference between the target pixel data and the average density value is within a predetermined value, the difference is corrected, so that an image of excellent gradation can be reproduced. When it is equal to or larger than the predetermined value, the difference is not corrected, so that the resolution of a character portion such as an edge portion can be improved.

    Speed detector for a vibration wave driven motor
    7.
    发明公开
    Speed detector for a vibration wave driven motor 失效
    汽车电机。

    公开(公告)号：EP0369331A2

    公开(公告)日：1990-05-23

    申请号：EP89120821.7

    申请日：1989-11-09

    申请人： CANON KABUSHIKI KAISHA

    发明人： Nishimura, Tetsuharu ,  Kiyomatsu, Satoshi ,  Hirata, Noritsugu ,  Yamada, Yasuhiro ,  Kishino, Hitoshi

    IPC分类号： G01P3/36

    CPC分类号： H02N2/14 ,  G01P3/366 ,  H02N2/163

    摘要： There is provided a vibration wave driven motor comprising: a number of diffraction gratings provided for either a rotating member or a vibrating member along a rotating direction; and an optical system for irradiating a light flux from a coherent light source to the diffraction gratings through a plurality of optical paths, for interfering a plurality of diffracted lights generated, and for allowing the resultant interference light to be detected by photo sensitive devices, wherein by detecting the outputs of the photo sensitive devices, the high accurate speed control is accomplished.

    摘要翻译： 提供了一种振动波驱动电动机，包括：沿旋转方向为旋转构件或振动构件设置的多个衍射光栅; 以及用于通过多个光路将来自相干光源的光束照射到衍射光栅的光学系统，用于干扰所产生的多个衍射光，并且允许所得到的干涉光被光敏器件检测，其中 通过检测感光装置的输出，可以实现高精度的速度控制。

    Tactile display apparatus for optical image pattern
    8.
    发明公开
    Tactile display apparatus for optical image pattern 失效
    达尔斯滕（Gerst）zur tastbaren Darstellung eines optisch aufgenommenen Bildmusters。

    公开(公告)号：EP0254554A1

    公开(公告)日：1988-01-27

    申请号：EP87306490.1

    申请日：1987-07-22

    申请人： CANON KABUSHIKI KAISHA

    发明人： Matsuoka, Mikiharu ,  Yamada, Yasuhiro ,  Miyazaki, Yasuko ,  Kanemoto, Takashi ,  Katayama, Hirohiko ,  Ikuta, Tamao ,  Tagaki, You of

    IPC分类号： G09B21/00

    CPC分类号： G09B21/003

    摘要： Selecting switches (106) are provided near a convertor (f01) for converting an optical image into an electric signal, thereby enabling the electric signal before or after it was stored to be efficiently selected. A plurality of convertors (101) may be provided and when an electric signal is not output from one of the convertors, the other convertors can be used. The analog electric signal output from the convertor is binarized by a reference level signal before it fluctuates. An electric power consumption when the apparatus is not used is prevented by power controller arranged near a tactile sensing display (104).

    摘要翻译： 选择开关（106）设置在转换器（101）附近，用于将光学图像转换成电信号，从而使得能够有效地选择存储之前或之后的电信号。 可以设置多个转换器（101），并且当不从其中一个转换器输出电信号时，可以使用其它转换器。 从转换器输出的模拟电信号在其波动之前被参考电平信号二进制化。 当设置在触觉感测显示器（104）附近的功率控制器防止不使用设备时的电力消耗。