Qing, Shao, Xu Tao, Yoshino Tatsuo, Song Nan, and Zhu Hang. “Classified Denoising Method for Laser Point Cloud Data of Stored Grain Bulk Surface Based on Discrete Wavelet Threshold”. International Journal of Agricultural and Biological Engineering 9, no. 4 (July 31, 2016): 123–131. Accessed January 27, 2026. https://ijabe.org/index.php/ijabe/article/view/2333.