摘要
现有非扫描激光雷达阵列探测器的信噪比较低,影响到系统的距离分辨率,详细分析了阵列探测器的噪声特性,得出了噪声满足各态历经性的重要结论,并指出在输入信号相同的条件下,可以通过空域积累代替时域积累的方法提高距离探测器的信噪比。并根据前述结论针对非扫描激光雷达/电视复合成像系统,提出一种采用改进邻域平均的图像处理方法提高非扫描激光雷达系统距离分辨率的图像处理方法,并应用于实际系统,结果表明该方法能够有效提高非扫描激光雷达系统距离分辨率。
The signal-to-noise-ratio （SNR） of the existing scannerless laser radar detector array is relatively low, which affects the range resolution of the system. The noise characteristics of the detector arrays were analyzed. It is pointed out that, the noise is ergodic and the SNR of range detector can be increased by using spatial domain accumulation in place of time-domain accumulation. According to this conclusion, an image processing method using the neighborhood averaging image processing method is proposed, which can improve range resolution of scannerless ladar system, specially for the scannerless laser radar/TV composite imaging system. The practical application in real system shows this method can effectively increase the range resolution of scannerless ladar system.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第5期1270-1274,共5页
Acta Optica Sinica
基金
武器预研基金(9140A01040307HT0125)资助项目
关键词
成像系统
非扫描激光雷达
图像处理
距离分辨率
邻域平均
imaging system scannerless laser radar image processing range resolution neighborhood averaging
