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激光雷达的距离像是雷达成像系统区别于其他的成像系统(如红外成像系统、可见光成像系统)所特有的信息,它是对目标精确识别、打击的基础。如何对距离像去噪直接决定了下一步目标定位、识别的精确性。针对雷达距离像的特点,提出了一种基于对比度调制方法对条纹管激光雷达的距离像去噪方法,通过提取距离像噪声的对比度信息,用其调制未经过去噪的距离像,从而得到距离像中的噪声图像,最后用未经过处理的距离像减去噪声图像,得到图像即为去噪后距离像。研究表明该方法去噪效果明显,在去噪的同时很好地保持了距离像的边缘信息,去噪后图像的信噪比明显提高,距离像的属性也没有改变,这是其他方法对距离像去噪所不具有的优点。
The distance of LIDAR is like the information unique to radar imaging system from other imaging systems (such as infrared imaging system and visible light imaging system). It is the basis of precise recognition and attack on the target. How to denoise the distance directly determines the location of the next target, to identify the accuracy. Aiming at the characteristics of radar distance image, this paper proposes a distance image denoising method based on the contrast modulation method for the fringe tube lidar. By extracting the contrast information of the distance image noise and using it to modulate the distance image without denoising, the distance Like the noise image, and finally with the unprocessed distance image minus the noise image, the image is denoised distance image. The results show that this method has obvious effect of denoising, preserves the edge information of the distance image well while denoising, the signal-noise ratio of the image after denoising obviously increases, and the property of distance image does not change, which is the result of other methods’ Like denoising does not have the advantages.