To provide an abnormality detection method of a monitoring camera that can detect video abnormality in a monitoring camera by image processing.SOLUTION: An abnormality detection method of a monitoring camera includes a first step of reading image data taken by a monitoring camera to be determined at a predetermined time, a second step of performing two-dimensional Fourier transform on the read image data, a third step of calculating an average brightness value of the two-dimensional Fourier transformed image in the second step, a fourth step of calculating the average brightness value by taking a difference between the two-dimensional Fourier transformed image in the second step and an image obtained by two-dimensional Fourier transforming a reference image of the monitoring camera to be determined, a fifth step of calculating the difference between the average brightness value calculated in the third step and the average brightness value calculated in the fourth step, and a sixth step of determining that the state of the monitoring camera is abnormal when the difference value calculated in the fifth step is smaller than a preset threshold value.SELECTED DRAWING: Figure 9

    【課題】監視用カメラの映像異常を画像処理で検知することが可能な監視用カメラの異常検知方法を提供する。【解決手段】判定対象の監視用カメラが所定の時刻に撮影した画像データを読み込む第1ステップと、読み込まれた画像データを2次元フーリエ変換する第2ステップと、第2ステップで2次元フーリエ変換された画像の平均明度値を算出する第3ステップと、第2ステップで2次元フーリエ変換された画像と判定対象の監視用カメラの基準画像を2次元フーリエ変換した画像の差をとって平均明度値を算出する第4ステップと、第3ステップで算出された平均明度値と前記第4ステップで算出された平均明度値との差を算出する第5ステップと、第5ステップで算出された差の値が予め設定されたしきい値よりも小さい場合に前記監視用カメラの状態に異常があると判定する第6ステップとを含むようにした。【選択図】図9


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    Titel :

    ABNORMALITY DETECTION METHOD OF MONITORING CAMERA


    Weitere Titelangaben:

    監視用カメラの異常検知方法


    Beteiligte:

    Erscheinungsdatum :

    05.04.2022


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen



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