A new seven-parameter BRDF model inspired by five-parameter BRDF model and fourteen-parameter BRDF model was developed. A retro-reflection part due to the back-reflected was introduced in the seven-parameter BRDF model. To assess the performance of the seven-parameter BRDF model, we measured BRDF of three kinds of samples and simulated the undetermined parameters of the five-parameter BRDF model and the seven-parameter BRDF model using the hybrid artificial bee colony algorithm, respectively. The experimental results demonstrate that the seven-parameter BRDF model has a good agreement with the retro-reflection peak and outperforms the five-parameter BRDF model in accuracy.
The laser scattering properties of the target, which is characterized by the laser radar cross section (LRCS), are the theoretical basis of the target detection and recognition of a lidar system, and play an important role in the design and evaluation of a lidar system. We calculated the LRCS of the vehicle based on the in-field measurement and numerical simulation. The experimental results demonstrate that the trend of simulated data of the vehicle and the corresponding experimental data is qualitatively similar, but there is a big difference in absolute value. Based on this, we can optimize the approaches for researching the laser scattering properties of the target.
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