![]() Walk roughly in a circle surround the scene/object. Move to the next spot, take three images. Start at one spot, take three images at high, middle, low position.The surrounding pyramids shows the 3D position of the images taken. In the center is the motorcycle dense reconstruction result in VisualSFM. Thus, the general idea is to take images from slowly translating angles.īelow is an example of taking pictures of a motorcycle. Ø view the scene from many angles to understand the three dimensional relationship. Note that distortion of the lens may affect the result modified photos may also cause inaccurate result. differences on resolutions, or image sizes, are acceptable). The images do not have to be taken with a single camera (i.e. Higher resolution images usually help preserve detail and get better reconstruction result. The idea is to get better quality images. We used Samsung Galaxy camera, which captures images that are 4608 pixels wide and 3456 pixels high and videos that are 1920x1080. Measurement and analysis: Use VisualSFM, Meshlab and CloudCompare tools to visualize and measure the deformation, as shown in the figure below (the bottom half).ĭigital camera is recommended. ![]() Take advantage of these applications to get 3D models from images, as shown in the figure below (left to right process). Process the images for reconstruction: Install VisualSFM and CMPMVS. We hope in the future to improve the quality of digital models generated.ĭinosaur tracks Cretaceous registry techniques virtual modelling.You will need to download and install a set of 3rd party software to analyze and visualize the data.Ĭapturing the images: Use digital camera to take images in sequence, in a pattern that sees the scene from all possible angles. During this exercise, reference parameters were obtained, to increase the effectiveness in photography for photogrammetric processing. In contrast, models from bigger sites lost definition, especially after certain adjustments made to improve their computer processing. Models from smaller sites had better quality because of their reduced size, the large number of photos taken and good strata contrast. ![]() In total, 11840 photographs were taken, 4960 were used to generate 72 three-dimensional textured polygonal mesh models for the six localities. Larger sites (Paso del Oso, 168 m2 and Las Águilas A, 340 m2 ) were divided into sections to simplify the photographic record. Also, a complete photo series throughout the deposit was taken. At smaller sites with a fewer number of footprints (Cantera Rojas, 26 m2 Depósito de la Luz, 37.5 m2 La Rosa, 60 m2 and Las Águilas B, 70 m2 ), individual shots of ichnites were taken. Ten commercial quality cameras (5 to 10 Mpx) were used to take photos at each site. For this purpose, the dinosaur tracks of six different sites (deposits) in FCdP were recorded. The technique consisted of modeling by digital photogrammetry through the open access software VisualSFM, Meshlab, CloudCompare and ParaView. The goal of this project was testing the effectiveness of a new and low-cost technique with no impact for the ichnites. In Cerro del Pueblo Formation (FCdP), a geological unit of the late Campanian, located in the southeast Coahuila, Mexico, there is a great fossil diversity, mainly dinosaur ichnites, which unfortunately have been little studied and are in danger of destruction, due to the erosion and human activities. In the last decade, digital modeling techniques have been shown to be very useful in the study of fossils and their preservation, especially with ichnites (footprints) that are very difficult to collect or model by traditional methods, due to deposit characteristics such as size, heritage, touristic importance and conservation status. Use of digital photogrammetry to record dinosaur footprints in the Cerro del Pueblo Formation (late Campanian), Coahuila, Mexico.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |