True-Color Reconstruction Based on Hyperspectral LiDAR Echo Energy

With the development of remote sensing technology, simultaneous acquisition 3D point cloud and color information has become constant goal for scientific research commercial applications in this field. However, since radar echo data practice refer to value spectral channel its corresponding energy, it is still impossible obtain accurate tristimulus values through integral calculation after traditional normalization multispectral correction. Furthermore, reflectance target, laser transmission power other factors lead problems no energy or weak some bands visible spectrum, which further leads large chromatic difference compared calculated from standard card. In response these problems, hyperbolic tangent spectrum correction model with parameters proposed acquired hyperspectral LiDAR 470–700 nm band. addition, improved gradient boosting decision tree sequence prediction algorithm reconstruction missing 400–470 band where missing. Experimental results show that there relatively small between obtained card, achieving purpose true reconstruction.