Accuracy & Automation
Accuracy and automation are the key advantages of Pix4UAV, backed up by the research effort of Dr. Strecha and his team over the past 10 years. Pix4UAV is recognized for its superior accuracy while being as easy to use as clicking on a single button.
Global Accuracy of up to 5 cm avg. in planimetry and altimetry can be achieved from regular consumer grade cameras with datasets of several hundreds images at 2 cm ground sampling distance, as described in our white paper and presented at international photogrammetry conferences.
Pix4UAV first computes the true locations and parameters of the original images through Pix4D’s advanced Automatic Aerial Triangulation (AAT) and Bundle Block Adjustment (BBA). Based on the cloud of 3D points retrieved during the AAT and the BBA, a digital surface model is generated by connecting these points. The number of 3D points is then further increased to reach up to pixel level point clouds, comparable or even higher than LIDAR. The orthomosaic is finally created by projecting and blending the original images with the DSM.
Scientific and white papers
- Automated Photogrammetric Techniques on Ultra-light UAV Imagery, C. Strecha, 2011 [pdf]
- Photogrammetric performance of an ultra light weight swinglet UAV [pdf], Vallet, Julien; Panissod, Flory; Strecha, Christoph; Tracol, M., UAV-g, Zurich, September 14-16, 2011
- The Accuracy of Automatic Photogrammetric Techniques on Ultra-light UAV Imagery [pdf], C. Strecha, L. Van Gool, P. Fua. UAV-g, Zurich, September 14-16, 2011
- A Generative Model for True Orthorectification [pdf], C. Strecha, L. Van Gool, P. Fua, ISPRS (Beijing), 2008
- Dynamic and Scalable Large Scale Image Reconstruction [pdf], C. Strecha, T. Pylvanainen and P. Fua, ISPRS (Beijing), 2008
- Wide-baseline Stereo from Multiple Views: a Probabilistic Account [pdf],C. Strecha, R. Fransens, L. Van Gool, CVPR vol.2 pages 552-559, 2004
- Dense Matching of Multiple Wide-baseline Views [pdf],C. Strecha, T. Tuytelaars, L. Van Gool, ICCV vol 2, pp. 1194-1201, 2003