Enhancement of B-Spline surface rebuilding for deformed CAD model reconstruction

Abstract

3D reconstruction stands for a method used to generate a three-dimensional (3D) model of a real object using a 3D point cloud or a 3D mesh using computer-aided design(CAD) software or reverse engineering (RE) techniques. The points’ coordinates are acquired by digitizing physical items using specialized instruments such as a three-dimensional measuring machine (CMM), a structured light scanner, or a LASER pulse-based 3D scanner. These scanned objects are notably invested in a panoply of industries, such as mechanics, aeronautics, vehicle manufacturing, medicine, and art. Within this particular framework, achieving a highly accurate reconstruction of the geometric model is a challenging task that requires a significant investment of time and relies heavily on the use of modeling and reverse engineering approaches. In this respect, this work introduces a novel method for reconstructing a CAD model through inserting new points into a given distorted mesh. Walton’s method is employed for accurate rebuilding so as to ensure a high level of accuracy in the fitted surfaces. B-Spline surfaces are estimated relying on the obtained 3D points, and then the geometric model is rebuilt. To assess the performance of the suggested approach, 3D surfaces are reconstructed, applying a 3D reconstruction algorithm to generate an accurate rebuilt model. The accuracy of the elaborated method is manifested through comparing the results of the geometric model reconstruction using the input mesh to those obtained after inserting new points.