PROBLEM TO BE SOLVED: To provide a raindrop detector that can precisely detect raindrops.SOLUTION: The raindrop detector includes: a camera 11 for taking an image of a windshield 2 from the inside of a vehicle C and acquiring image data; and a raindrop determination unit 22 that determines the presence of raindrops based on the image data. The raindrop determination unit 22 performs edge extraction processing for extracting edges from sequentially taken image data, and repeats presence determination processing q times (q is an integer larger than one) for determining the presence of an edge if an edge has been detected at the same position p times out of the past m times (m is an integer larger than one and p is an integer smaller than m). After that, based on an edge which has been determined to exist after the processing, the presence of raindrops is determined.SELECTED DRAWING: Figure 1

    【課題】雨滴の存在を精度良く検出することができる雨滴検出装置を提供すること。【解決手段】雨滴検出装置は、車両Cの内部からフロントガラス2を撮像して画像データを取得するカメラ11と、画像データに基づいて雨滴の有無を判定する雨滴判定部22とを備える。雨滴判定部22は、順次撮像される画像データ中のエッジを抽出するエッジ抽出処理を行い、同じ位置におけるエッジが過去m回(但しmは複数)中にp回(但しpはm未満の整数)あると、エッジが存続したと判定する存続判定処理をq段階(但しqは複数)繰り返して、最終的に存続したと判定されたエッジに基づいて雨滴の有無を判定する。【選択図】図1


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    Title :

    RAINDROP DETECTOR, WINDSHIELD WIPER DEVICE, AND RAINDROP DETECTION METHOD


    Additional title:

    雨滴検出装置、車両ワイパ装置及び雨滴検出方法


    Contributors:
    TAKANO SHO (author)

    Publication date :

    2017-05-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen



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