Page 28 - 3DF Zephyr
P. 28
Polygon count (only for smooth reconstruction type): it checks the discretization parameter during the surface reconstruction. You should increase this value when you want to keep a high mesh detail. Decreasing this value can be helpful when: - You do not have enough memory on your pc; - You get noisy results; - You need a low-poly surface; Smoothness: allows to define the smoothness of a mesh. You'd better increase this value when you get noisy results and decrease it to preserve higher details. Reconstruction Type: it is in charge of edges management and you can pick the final output (smooth or sharp shape) of surfaces edges. Number of minimum / maximum vertices: this step starts after the mesh generation algorithm and it does not add detail to the output mesh: when the option is activated a simplification (or densification) is performed so as to get the desired number of vertices. Photoconsistency Based Optimization: this options controls the photoconsistency based mesh optimization. This will generally improve the details extracted of the mesh, and although it will require some computation time, it's generally worth using it. You can pick the number of neighbor cameras to use for the photoconsistency as well as the image resolution used: usually (but not always) you can get better results if the image resolution of the photoconsistency based optimization is higher than the resolution used in the stereo step. You may also run the photoconsistency mesh optimization as a mesh filter from the tools menu. You can start the mesh reconstruction by clicking on Next and then on Run button. Timing may vary depending on the total amount of polygons you have previously selected. You can create several surfaces in the same Zephyr project using different parameters. A further description of the parameters above is available here: http://www.3dflow.net/3df-zephyr-parameters-tuning-guide/ Texture generation In the last fourth phase of 3D reconstruction of Zephyr it is possible to start the texture generation on a 3D model by clicking Workflow > Textured mesh generation (15).
