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    • 4. 发明申请
    • IMAGE RECOGNITION SYSTEM FOR VEHICLE FOR TRAFFIC SIGN BOARD RECOGNITION
    • 用于交通标志牌识别的车辆图像识别系统
    • US20150371097A1
    • 2015-12-24
    • US14765004
    • 2014-05-01
    • PLK TECHNOLOGIES CO., LTD.
    • Kwang Il PARKSang Mook LIMJin Hyuck KIM
    • G06K9/00H04N5/225H04N5/235
    • G06K9/00818H04N5/2253H04N5/2352H04N5/2353H04N5/2354H04N5/2356H04N5/243
    • The present invention can improve the recognition performance of a traffic sign board, improve the recognition performance of a reflective traffic sign board and a light emitting type traffic sign board by adjusting an exposure of a camera, improve the recognition performance of the reflective traffic sign board and the light emitting type traffic sign board by adjusting gain of an image signal, and improve the recognition performance of the reflective traffic sign board and the light emitting type traffic sign board by simultaneously adjusting the exposure of the camera and the gain of the image signal. In an image recognition system for a vehicle for traffic sign board recognition according to the present invention, an exposure time of a camera lens or gain of an image output from an image sensor is adjusted to generate at least one image group including a plurality of frames in which the exposure time and the gain are different from each other, sign board regions of the plurality of frames are compared with each other, and an image nearest to a predetermined set value is selected.
    • 本发明可以提高交通标志牌的识别性能,通过调整摄像机的曝光度来提高反光标识牌和发光型交通标志牌的识别性能,提高反光标识牌的识别性能 以及通过调整图像信号的增益来发光型交通标志牌,并且通过同时调整照相机的曝光和图像信号的增益来提高反射交通标志牌和发光型交通标志牌的识别性能 。 在根据本发明的用于交通标志牌识别的车辆的图像识别系统中,调整相机镜头的曝光时间或从图像传感器输出的图像的增益以生成包括多个帧的至少一个图像组 其中曝光时间和增益彼此不同,所以将多个帧中的符号板区域彼此进行比较,并且选择最接近预定设定值的图像。