The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLI-B5
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B5, 627–632, 2016
https://doi.org/10.5194/isprs-archives-XLI-B5-627-2016
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B5, 627–632, 2016
https://doi.org/10.5194/isprs-archives-XLI-B5-627-2016

  16 Jun 2016

16 Jun 2016

TREE STEM RECONSTRUCTION USING VERTICAL FISHEYE IMAGES: A PRELIMINARY STUDY

A. Berveglieri and A. M. G. Tommaselli A. Berveglieri and A. M. G. Tommaselli
  • UNESP, Universidade Estadual Paulista, Department of Cartography, Rua Roberto Simonsen 305, Presidente Prudente, Brazil

Keywords: Dense Reconstruction, Fisheye, Image Rectification, Photogrammetry

Abstract. A preliminary study was conducted to assess a tree stem reconstruction technique with panoramic images taken with fisheye lenses. The concept is similar to the Structure from Motion (SfM) technique, but the acquisition and data preparation rely on fisheye cameras to generate a vertical image sequence with height variations of the camera station. Each vertical image is rectified to four vertical planes, producing horizontal lateral views. The stems in the lateral view are rectified to the same scale in the image sequence to facilitate image matching. Using bundle adjustment, the stems are reconstructed, enabling later measurement and extraction of several attributes. The 3D reconstruction was performed with the proposed technique and compared with SfM. The preliminary results showed that the stems were correctly reconstructed by using the lateral virtual images generated from the vertical fisheye images and with the advantage of using fewer images and taken from one single station.