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    SIGNAL PROCESSING DEVICE AND METHOD, RECORDING MEDIUM, AND PROGRAM
    11.
    发明公开
    SIGNAL PROCESSING DEVICE AND METHOD, RECORDING MEDIUM, AND PROGRAM 有权
    信号处理设备和方法记录介质和程序

    公开(公告)号：EP1622080A4

    公开(公告)日：2007-04-25

    申请号：EP04728290

    申请日：2004-04-19

    Applicant: SONY CORP

    Inventor： OKADA SHINTARO ,  UEDA KAZUHIKO ,  ASANO MITSUYASU ,  KUBOZONO TAKESHI ,  YOKOYAMA KAZUKI

    IPC: G06T5/00 ,  G06T5/20 ,  H04N1/409 ,  H04N5/208

    CPC classification number: H04N1/4092 ,  G06T5/004 ,  G06T5/20 ,  H04N5/208

    Abstract: There are provided a signal processing device and method, a recording medium, and a program capable of smoothing a portion other than an edge while accurately maintaining the edge having a precipitous pixel value change. Step (S11) decides a pixel-in-attention. Step (S12) decides a pixel-in-the-vicinity. Step (S13) calculates a difference between the pixel-in-attention and the pixel-in-the-vicinity. Step (S14) establishes a flag in this pixel-in-the-vicinity and in a pixel-in-the-vicinity which is in a symmetric relationship to this pixel-in-the-vicinity according to the magnitude relation between the difference and a threshold value ϵ. Furthermore, a flag is established in a pixel-in-the-vicinity farther from the pixel-in-attention than the pixel-in-the-vicinity in the symmetric relationship where the flag has been established. Step (S15) calculates weighted average of the tap of seven pixels around the pixel-in-attention. Here, for the pixel-in-the-vicinity having the flag, the calculation is performed by replacing the pixel value with the value of the pixel-in-attention C. The present invention can be applied to a video camera, a television receiver, and the like.

    13.
    发明专利
    未知

    公开(公告)号：DE602004023158D1

    公开(公告)日：2009-10-29

    申请号：DE602004023158

    申请日：2004-07-08

    Applicant: SONY CORP

    Inventor： YOKOYAMA KAZUKI ,  UEDA KAZUHIKO ,  ASANO MITSUYASU ,  KUBOZONO TAKESHI ,  INADA TETSUJI

    IPC: G06T5/00 ,  G06T5/20 ,  H04N1/409 ,  H04N5/205 ,  H04N5/235

    Abstract: A signal processing apparatus includes a nonlinear filter (12), a pattern detector (15), and a switch (16). The nonlinear filter filters an input image signal to the effect that a steep edge whose size is larger than a predetermined threshold determined from fluctuations of pixels of the input image signal is passed and, at the same time, smoothes a non-edge portion that does not include the edge. The pattern detector detects a fine edge in the fluctuations of the pixels constituting the input image signal and notifies the switch that the fine edge exists. The switch outputs the input image signal or the filtered image signal output from the nonlinear filter in accordance with the notification from the pattern detector (15).

    14.
    发明专利
    未知

    公开(公告)号：DE602005004489T2

    公开(公告)日：2009-02-12

    申请号：DE602005004489

    申请日：2005-12-06

    Applicant: SONY CORP

    Inventor： NISHI TORU ,  UEDA KAZUHIKO ,  ASANO MITSUYASU

    IPC: G06T5/00

    Abstract: An image processing apparatus includes a corrector for correcting a pixel value of each of a plurality of pixels forming each access unit to be processed, based on at least one of the parameter values corresponding to the access unit to be processed. The corrector includes an acquisition unit for acquiring input pixel values, a first mean value calculating unit for calculating a first mean pixel value, a second mean value calculating unit for calculating a second mean pixel value, a correction value determination unit for determining a correction value, and an adding unit for adding the correction value to the input pixel value of a target pixel.

    CIRCUIT FOR REDUCING NOISE
    15.
    发明专利
    CIRCUIT FOR REDUCING NOISE 未知

    公开(公告)号：GB2211692A

    公开(公告)日：1989-07-05

    申请号：GB8826995

    申请日：1988-11-18

    Applicant: SONY CORP

    Inventor： ASANO MITSUYASU

    IPC: H04N5/21

    Abstract: PCT No. PCT/JP88/00286 Sec. 371 Date Jan. 10, 1989 Sec. 102(e) Date Jan. 10, 1989 PCT Filed Mar. 18, 1988 PCT Pub. No. WO88/07307 PCT Pub. Date Sep. 22, 1988.A noise reduction circuit in which a first signal (S h2) is obtained by passing the input video signal (S I ) through a low frequency shut-off filter (10) and another a limiter (11), a second before signal (S H21) is obtained by passing the above obtained signal (S H2) through a field or frame delay circuit (5) and the difference between the two signals (S H2- SH21) is subtracted from the above input video signal (S I ) so as not to lower the definition of image, the noise reduction circuit being capable of application in a television receiver etc.

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