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    FUZZY LOGIC DEVICE FOR REDUCTION OF IMAGE NOISE
    1.
    发明专利
    FUZZY LOGIC DEVICE FOR REDUCTION OF IMAGE NOISE 失效

    公开(公告)号：JPH08190628A

    公开(公告)日：1996-07-23

    申请号：JP20877595

    申请日：1995-08-16

    Applicant: ST MICROELECTRONICS SRL ,  CONS RIC MICROELETTRONICA

    Inventor： PENNINO LAURA ,  MANCUSO MASSIMO ,  TRAVAGLIA FEDERICO ,  POLUZZI RINALDO ,  RIZZOTTO GIANGUIDO

    IPC: G06F9/44 ,  G06N7/02 ,  G06T5/00 ,  G06T5/20

    Abstract: PROBLEM TO BE SOLVED: To perform an excellent noise reduction operation while preserving useful high-pass (high band) information. SOLUTION: This device is provided with an interface 1 for obtaining the gray levels of the pixel to be processed of images and the adjacent pixel, a difference circuit 2 for generating the difference of the gray levels of the pixel to be processed and the adjacent pixel, a fuzzy flat area smoothing circuit 8 for performing the low-pass (low band) smoothing of an almost uniform area stipulated by the pixel and the adjacent pixel, an edge preservation smoothing circuit 9 for performing a low-pass filtering processing to a high frequency information area stipulated by the pixel and the adjacent pixel, an area voter circuit 4 for supplying a measurement value for examining whether or not the area stipulated by the pixel and the adjacent pixel is almost uniform and a soft switching circuit 10 for weighting the output of the smoothing circuits 8 and 9 based on the measurement value.

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