The invention relates to an image processing method for license plate recognition and a camera, and the method comprises the steps: configuring an image sensor into a double-gain mode, and employing different gain modes for two adjacent frames; calculating a fusion region according to the gain ratio; reading the data of two adjacent frames collected by the image sensor, and combining the brightness maximum value and the brightness minimum value corresponding to the fusion region; carrying out license plate ROI region identification on the fused data; taking the target brightness as a brightness adjustment target of the license plate ROI region of the fused data, calculating an exposure parameter of an image sensor through an automatic exposure algorithm, and setting the image sensor through the calculated exposure parameter; and updating the gain ratio based on the calculation result of the automatic exposure algorithm, and fusing two adjacent frames of data acquired next time. According to the invention, external environment interference is reduced, and the requirement of license plate recognition in multiple scenes can be met.
本发明涉及一种用于车牌识别的图像处理方法及摄像机,该方法中包括:将图像传感器配置为双增益模式,且相邻两帧采用不同的增益模式;根据增益比计算融合区;读取图像传感器采集的相邻两帧的数据,结合融合区对应的亮度最大值和亮度最小值进行融合;对融合后的数据进行车牌ROI区域的识别;以目标亮度作为融合后的数据的车牌ROI区域的亮度调整目标,通过自动曝光算法计算图像传感器的曝光参数,并通过计算的曝光参数对图像传感器进行设置;基于自动曝光算法的计算结果对增益比进行更新后用于下一次采集的相邻两帧数据的融合。本发明减少外界环境干扰,能够满足多场景下的车牌识别的需求。
Image processing method for license plate recognition and camera
一种用于车牌识别的图像处理方法及摄像机
25.04.2025
Patent
Elektronische Ressource
Chinesisch
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