WEATHER DETERMINATION DEVICE AND WEATHER DETERMINATION METHOD

• Main Authors: MITOMA HIROTO, TSUTSUMI MASARU
• Format: Patent
• Language: English; Japanese
• Published: 10.08.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MEASURING; METEOROLOGY; PHYSICS; SIGNALLING; TESTING; TRAFFIC CONTROL SYSTEMS

To provide a weather determination device and a weather determination method which can accurately determine the weather even when a three-dimensional object is photographed in an image used for determination of the weather.SOLUTION: A weather determination device comprises: an actual edge intensity calculation part which calculates an actual edge intensity being an edge intensity in a region where a three-dimensional object in an image is detected; a three-dimensional object type determination part which determines a type of the three-dimensional object from a feature amount in the three-dimensional object; a type edge intensity acquisition part which acquires a type edge intensity on the basis of a type edge intensity table that previously determines the edge intensity in the good visual field weather in which the visual field is good that is corresponding to a distance and the type of the three-dimensional object determined by the three-dimensional object type determination part; and a weather determination part which determines that the weather within a range of the image is the poor visual field weather in which the visual field is poor when a difference between the actual edge intensity calculated by the actual edge intensity calculation part and the type edge intensity acquired by the type edge intensity acquisition part is larger than a predetermined threshold, and outputs a determination result.SELECTED DRAWING: Figure 1 【課題】天候の判定に用いる画像中に立体物が撮像されている場合にも精度良く天候を判定することができる天候判定装置および天候判定方法を提供すること。【解決手段】画像の立体物を検知した領域におけるエッジ強度である実エッジ強度を算出する実エッジ強度算出部と、立体物における特徴量から立体物の種別を判定する立体物種別判定部と、立体物種別判定部で判定した立体物の種別と距離とに対応する、視界良好である視界良好天候時のエッジ強度を予め定めた種別エッジ強度テーブルに基づいて、種別エッジ強度を取得する種別エッジ強度取得部と、実エッジ強度算出部で算出した実エッジ強度と種別エッジ強度取得部で取得した種別エッジ強度との差分が予め定めた閾値よりも大きい場合に、画像の範囲の天候が視界不良である視界不良天候であると判定し、判定結果を出力する天候判定部とを備える。【選択図】 図１