TURNTABLE-BASED and ARTIFICIAL TEXTURE AIDED PHOTOGRAMMETRIC 3D RECONSTRUCTION and SPECIFICATION MEASUREMENT of SHUTTLECOCK

In the course of 3D object reconstruction, it is likely to experience incomplete reconstruction for those low-textured objects using photogrammetric means. Badminton is one of exciting sports, yet the 3D reconstruction of shuttlecock has never been easy due to its highly homogenous tone and symmetric shape, making it perfect to be our low-texture target. Under the low-cost consideration, a digital camera, projector, and turntable are used to capture images. By using the turntable and artificial tie points, the number of consumed projectors could be as less as one, and the full 360° coverage of image acquisition can be obtained. The artificial tie points arrange and join all partial point clouds into a complete set in Agisoft Photoscan platform, while the projected artificial textures support adequate richness of features for dense image matching. Besides, the scale control through precise distance measurements implements the 3D reconstruction task in a much easier and straightforward manner. The results of point cloud show that the completeness and geometrical accuracy of point clouds meet the required quality. However, the error of check scale in about 1.4 times of GSD, i.e. 0.14 mm suggests that further improvements are needed. Last but not least, 3D point clouds of shuttlecock made by the proposed method can provide efficiently and conveniently analytical data for specification measurement, such as roundness and lengths, and perform quality inspection for the process of shuttlecocks production.