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    • 4. 发明专利
    • Video frame processing for motion comparison
    • AU2017377130B2
    • 2022-08-11
    • AU2017377130
    • 2017-07-13
    • PRAAKTIS LTD
    • ROSSON PAUL ANDREW
    • G06K9/00G06K9/62G06T7/269
    • A method is disclosed of processing a sequence of video frames showing motion of a subject to compare the motion of the subject with a reference motion. The method comprises storingat least one reference motion data frame defining a reference motion, each reference motion data frame corresponding to respective first and second reference video frames in a sequence of video frames showing the reference motion and comprising a plurality of optical flow vectors, each optical flow vector corresponding to a respective area segment defined in the first reference video frame and a corresponding area segment defined in the second reference video frame and defining optical flow between the area segment defined in the first reference video frame and the area segment defined in the second reference video frame. The method further comprises receiving a sequence of video frames to be processed. The method further comprises processing at least one pair of the received video frames to generate a motion data frame defining motion of a subject between the pair of received video frames. Each pair of received video frames that is processed is processed by, for each area segment of the reference video frames, determining a corresponding area segment in a first video frame of the pair and a corresponding area segment in a second video frame of the pair. Each of the pairs of received video frames is further processed by, for each determined pair of corresponding area segments, comparing the area segments and generating an optical flow vector defining optical flow between the area segments. Each of the pairs of received video frames is further processed by generating a motion data frame for the pair of received video frames, the motion data frame comprising the optical flow vectors generated for the determined pairs of corresponding area segments. The method further comprises comparing the at least one reference motion data frame defining the reference motion to the at least one generated motion data frames defining the motion of the subject and generating a similarity metric for the motion of the subject and the reference motion.
    • 5. 发明专利
    • PROCEDE DE CONTRÔLE D’UN DISPOSITIF LUMINEUX APTE A EMETTRE DEUX FAISCEAUX LUMINEUX PIXELISES DE RESOLUTIONS DIFFERENTES
    • FR3099541A1
    • 2021-02-05
    • FR1908777
    • 2019-07-31
    • VALEO VISION
    • MIMOUN MICKAEL
    • F21S41/65F21S41/153G06T7/269
    • L’invention a pour objet un procédé de contrôle d’un dispositif lumineux (1) d’un véhicule automobile comprenant au moins des premier et deuxième modules lumineux (3, 4) agencés pour émettre respectivement des premier et deuxième faisceaux lumineux pixélisés (HD, LD) dans des première et deuxième zones d’émission prédéterminées (ZHD, ZLD) qui leurs sont associées, la résolution du premier faisceau lumineux pixélisé étant supérieure à la résolution du deuxième faisceau lumineux pixélisé et les première et deuxième zones d’émission prédéterminées étant adjacentes, le procédé comportant les étapes suivantes : (E1) Détection de la présence d’un objet cible (C) dans une zone donnée parmi les première et deuxième zones d’émission prédéterminées ; (E2) Formation d’une zone sombre (ZS) dans le faisceau lumineux pixélisé associé à ladite zone donnée, par extinction ou atténuation d’au moins un pixel (HDi,j) dudit faisceau lumineux pixélisé, située au niveau de l’objet cible; (E3, E4) Modification progressive d’au moins un premier pixel (LD1) du deuxième faisceau lumineux pixélisé lorsque l’objet cible se déplace de ladite zone donnée vers l’autre zone des première et deuxième zones d’émission prédéterminée et avant que l’objet cible atteigne l’autre zone. Figure pour l’abrégé : Fig. 4
    • 6. 发明专利
    • Slope sliding area assessment method
    • AU2019438357A1
    • 2020-10-29
    • AU2019438357
    • 2019-10-31
    • UNIV QINGDAO TECHNOLOGY
    • LI LIANGCHU XUESONGYUAN CHANGFENGYU GUANGMINGZHAI MING
    • G06T7/269
    • The present invention belongs to the field of slope stability evaluation and disaster prevention technologies, and relates to an evaluation method for a slope sliding area. An initial sliding surface corresponding to a minimum safety factor of a slope, a 5 corresponding initial sliding area and an initial weight are first calculated; then a possible sliding region of the slope is covered, a plurality of feasible sliding surfaces are randomly generated to simulate the possible sliding region of the slope, and secondary safety factors of the feasible sliding surfaces are calculated; and feasible sliding surfaces with secondary safety factors less than or equal to 1 are taken as secondary invalid sliding 10 surfaces, then areas of the secondary invalid sliding surfaces are calculated one by one, all the secondary invalid sliding areas and the initial sliding area are accumulated without repetition, and finally the slope sliding area is evaluated by using a cumulative value. An error value of the slope sliding area calculated according to the present invention is relatively small, and the slope sliding area may be used for preliminary evaluation of the 15 consequences of slope sliding.