532 nm激光成像雷达在成像过程中容易受到日光干扰而降低图像信噪比。利用532 nm条纹管激光雷达对复杂场景(建筑物群)进行昼夜成像实验,并采用直方图统计法分析同一场景分别在白昼和夜晚的激光强度像和距离像的像素值分布,进而分析日光对激光成像性能影响。实验结果表明:日照光会提高激光强度像的亮度以及背景/目标的对比度,同时也增加了距离像的空天背景噪声;夜晚激光距离像信噪比高,但目标强度像对比度不佳。 The 532 nm laser imaging radar is susceptible to sunlight interference and degrades the image signal-noise ratio during imaging. Daytime and nighttime imaging experiments were performed on complex scenes (buildings) with a 532 nm stripe-tube Lidar. The distribution of pixel values ​​of laser intensity image and distance image in the same scene at the same scene in the same scene was analyzed by histogram analysis. Laser imaging performance impact. The experimental results show that: the sunshine will improve the intensity of the laser intensity image and the contrast of the background / object, and also increase the sky background noise of the distance image; the night laser distance image signal to noise ratio is high, but the target intensity image contrast is not good.