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    Image processing apparatus and method
    2.
    发明公开
    Image processing apparatus and method 失效
    Bildverarbeitungsgerätund -verfahren

    公开(公告)号：EP0781034A3

    公开(公告)日：1998-08-05

    申请号：EP96309371

    申请日：1996-12-20

    Applicant: CANON KK

    Inventor： KABURAGI HIROSHI ,  YAMAGATA SHIGEO ,  ICHIKAWA HIROYUKI

    IPC: H04N1/405 ,  H04N1/41

    CPC classification number: H04N1/4053

    Abstract: Upon gradation converting input m-bit image information into n-bit image information (m and n are integers; m > n), random numbers, the maximum values of which are changed in accordance with the input values of the m-bit image information, are generated at periods of two or more pixels, and the random numbers are selectively output while switching their signs to positive/negative within the period of two or more pixels. The output signal values and the input values of the m-bit image information are added to each other, and the sum signal values are converted into n-values by a density preservation type quantization method. With this control, the problems of sweeping, texture, and the like of the conventional density preservation type quantization method can be solved without emphasizing the granularity of an image.

    Abstract translation: 在将输入的m位图像信息灰度转换成n位图像信息（m和n是整数; m> n）时，根据m位图像信息的输入值改变其最大值的随机数 以两个或更多像素的周期产生，并且在两个或更多个像素的周期内将它们的符号切换为正/负的情况下，随机数被选择性地输出。 将m位图像信息的输出信号值和输入值相加，并且通过密度保持型量化方法将和信号值转换为n值。 通过这种控制，可以在不强调图像的粒度的情况下解决常规密度保持型量化方法的清扫，纹理等问题。

    3.
    发明专利
    未知

    公开(公告)号：DE60034185D1

    公开(公告)日：2007-05-16

    申请号：DE60034185

    申请日：2000-07-28

    Applicant: CANON KK

    Inventor： YAMAGATA SHIGEO ,  MIYAMOTO RYOSUKE ,  EIJI OHARA

    IPC: H04N1/00

    Abstract: Conventionally, it is impossible to securely and efficiently implement the judgment of specific images. In order to solve this task, an image processing apparatus according to the present invention is characterized in including an input unit (in these embodiments, this corresponds to, for example, the interface unit 111 in FIG. 1) for inputting color image data, a judging unit (this corresponds to, for example, the forgery judging unit 113 in FIG. 1) for judging whether the judgment of whether a color image composed of the color image data is a specific image has been already performed, and an image judging unit (this corresponds to, for example, the forgery unit 113 in FIG. 1) for judging whether the color image includes the specific image if the judgment has not been performed yet.

    4.
    发明专利
    未知

    公开(公告)号：AT358944T

    公开(公告)日：2007-04-15

    申请号：AT00306433

    申请日：2000-07-28

    Applicant: CANON KK

    Inventor： YAMAGATA SHIGEO ,  MIYAMOTO RYOSUKE ,  EIJI OHARA

    IPC: H04N1/00

    Abstract: Conventionally, it is impossible to securely and efficiently implement the judgment of specific images. In order to solve this task, an image processing apparatus according to the present invention is characterized in including an input unit (in these embodiments, this corresponds to, for example, the interface unit 111 in FIG. 1) for inputting color image data, a judging unit (this corresponds to, for example, the forgery judging unit 113 in FIG. 1) for judging whether the judgment of whether a color image composed of the color image data is a specific image has been already performed, and an image judging unit (this corresponds to, for example, the forgery unit 113 in FIG. 1) for judging whether the color image includes the specific image if the judgment has not been performed yet.

    5.
    发明专利
    未知

    公开(公告)号：DE69631948T2

    公开(公告)日：2005-02-10

    申请号：DE69631948

    申请日：1996-12-20

    Applicant: CANON KK

    Inventor： KABURAGI HIROSHI ,  YAMAGATA SHIGEO ,  ICHIKAWA HIROYUKI

    IPC: H04N1/405 ,  H04N1/41

    Abstract: Upon gradation converting input m-bit image information into n-bit image information (m and n are integers; m > n), random numbers, the maximum values of which are changed in accordance with the input values of the m-bit image information, are generated at periods of two or more pixels, and the random numbers are selectively output while switching their signs to positive/negative within the period of two or more pixels. The output signal values and the input values of the m-bit image information are added to each other, and the sum signal values are converted into n-values by a density preservation type quantization method. With this control, the problems of sweeping, texture, and the like of the conventional density preservation type quantization method can be solved without emphasizing the granularity of an image.

    7.
    发明专利
    未知

    公开(公告)号：DE69128161D1

    公开(公告)日：1997-12-18

    申请号：DE69128161

    申请日：1991-03-18

    Applicant: CANON KK

    Inventor： NAGASAWA KENICHI ,  YAMAGATA SHIGEO ,  MISUMI HIROYOSHI

    IPC: G11B15/087 ,  G11B15/18 ,  G11B15/467 ,  G11B27/00 ,  G11B27/10 ,  G11B27/30 ,  H04N5/77 ,  H04N5/783 ,  H04N5/926 ,  H04N5/937

    Abstract: The present invention is intended to solve a problem which may be encountered during a transfer from a mode for searching a desired still image to a mode for performing actual reproduction during the process in which still image information is reproduced from a tape-shaped recording medium on which a multiplicity of helical tracks are formed for one picture of still image information, one picture of still image information and address information indicative of the number thereof being recorded in the multiplicity of helical tracks. The sensation of an operator can be made coincident with an actually reproduced still image, for example, by effecting such mode transfer by detecting and using a number adjacent to a desired still image number or by shifting the tape-shaped recording medium by a predetermined amount. Accordingly, it is possible to to search a desired still image rapidly and easily.

    10.
    发明专利
    未知

    公开(公告)号：DE69118616T2

    公开(公告)日：1996-09-19

    申请号：DE69118616

    申请日：1991-08-01

    Applicant: CANON KK

    Inventor： TAKAYAMA TSUTOMU ,  YAMAGATA SHIGEO ,  YAMAZAKI YASUYUKI

    IPC: H04N5/235 ,  H04N9/73 ,  H04N5/225

    Abstract: An electronic still video camera in which the colour balance is controlled by opening the shutter and exposing the image sensor, deriving from the image sensor output separated colour signals, and integrating the signals over the entire picture, to derive a measure of the colour balance of the picture which is then used to control the colour balance of a further exposure operation used to record a picture. The effects of electrical noise and/or drift are eliminated by deriving a measure of the magnitude of the noise and/or drift and subtracting this from the integrated colour signals before they are used to control the colour balance.

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