Noises mechanism of range image in coherent laser radar and the range anomalies suppression

The noises mechanism of range image is analyzed in this paper: range anomalies result in average distribution while range normal result in Gaussian distribution. To this end, a laser radar range image suppression algorithm based on local histogram is put forward: Apply the local histogram to judge pixel anomalies and remove by optimum distance so as to achieve range anomalies suppression. Apply it to the process of actual laser radar range image and get satisfying results. The range information from the processed laser range image shows that the distance between the two objects is 75 m, reflects the actual objects' interval (77 m) exactly. Both the targets obtain mean range grayscale value.