Effects of Wall Angle between Small Strip Areas by Using Point Cloud Data

Floors, walls, and ceilings in building construction projects are essential to inspect for checking the quality. The internal wall inspection mainly includes evaluation criteria, measuring techniques, and evaluation items. Traditionally, measuring the right angles between two walls has only been done visually or with a traditional ruler approach, which takes a lot of time. This paper applies point cloud technology to analyze the evaluation of the angles with the use of the MATLAB programming platform. In contrast to the conventional approach, the tools that are typically used to identify the angles include an L-squared ruler that is 30 and 50 cm long. Therefore, this research focus is on the comparison of angle measurement from the full point cloud and partial point cloud (strip model). This research was mainly conducted in two approaches. Firstly, to evaluate the angle between the walls and floors by using the MSAC algorithm with full plane model input and then the second approach automatically cuts the input model again into smaller sizes and then measures its angle. Then the full model and the cut model are compared to check the effect of the angle results depending on the plane size. This research also attempted to examine the distance effect on the laser scanner between the wall and the scanner for extended analysis. From the analysis result, the proposed conceptual framework can be used to check the angle values by automatically cutting the full plane model and their effect on the different distances.