Terrestrial laser scanning (TLS) systems generate dense point clouds for many applications. These systems generate point clouds in a local three-dimensional (3D) coordinate system (x, y, z) and measure the intensity of the backscattered signal. Although the intensity data collected can be useful for various applications, the received signals are affected by distance and angle of incidence. The objective of this study is to assess existing methods for correcting intensity values using polynomial approximation to compensate for the effect of distance and to evaluate the impact on intensity data collected under different lighting conditions. In this study, it was possible to obtain a good approximation of the ideal case through polynomial approximation, with a low R². In addition to the model and, the coefficient of variation RMS were evaluated to evaluate the adjustment accuracy