Vain, Ants, Sanna Kaasalainen, Juha Hyyppä, and Eero Ahokas. “Calibration of Laser Scanning Intensity Data Using Brightness Targets”. Geodesy and Cartography 35, no. 3 (August 3, 2012): 77-81. Accessed November 22, 2024. https://btp.vgtu.lt/index.php/GAC/article/view/10864.