针对固定红外摄像机视频监控在夜雾天况下获得的成像效果差、监控范围有限等问题,运用带云台的LED红外摄像机,结合红外成像与可见光成像的特点,提出一种变焦式夜雾天彩色视频构建的方法。该方法在天气状况良好的白天利用可见光成像特点实现全景图像接拼,然后将红外图像与全景图像配准,从而构建出视场角一致的可见光背景图像。在能见度较低的夜雾下利用红外成像系统提取运动目标,然后通过掩模融合算法和配准参数,将运动目标同比例发融合到可见光背景图像相同位置中,最终实现变焦式彩色视频构建。实验结果表明,该方法能够满足大范围监控和夜雾天全天候彩色视频实时监控的要求。

For the fixed infrared camera video surveillance, and the poor imaging results and limited monitoring range in the night and foggy weather conditions, we propose the zoom color video construction method in night and foggy days based on LED infrared camera with PTZ, combining with the characteristics of infrared imaging and visible light imaging. This method uses visible light imaging to achieve panoramic image stitching during daytime with good weather conditions, then the infrared image with the panoramic image is registered to construct a visible light background image with the same field angle. An infrared imaging system is used to extract moving objects in night and foggy days with low visibility, then through the mask fusion algorithm and the registration parameters, the moving target is fused to the same position of the visible light background image in the same proportion, and finally the zoom color video is constructed. The experimental results show that this method can meet the requirements of wide monitoring, real-time monitoring of color video in night and foggy all days.