2023 Volume 79 Issue 22 Article ID: 22-22053
The Ministry of Land, Infrastructure, Transport and Tourism is promoting i-Construction, which utilizes 3D information to improve productivity at construction sites. Most of the 3D information representing the current topography measured by laser scanners is stored as point clouds. Point clouds generally store only 3D coordinate values and reflection intensity, but they can be given RGB values using camera images, and are widely used due to the high visibility of features. However, since the laser scanner and the camera are not integrated and not synchronized in many measuring instruments, moving objects such as moving vehicles appear in the camera image at different times from the time measured by the laser scanner. As a result, there is a problem that a colored point cloud is generated that includes areas that are not colored correctly. Therefore, in this research, we develop a technique to detect and correct defective coloring points that are not correctly colored in the colored point cloud.
