79 articles listed in reverse chronological order. View articles by field type using links on the right.
The authors compare digitization results and procedures for one of the most famous stecci (gravestone) – The Stecak from Donja Zgosca. The object was first digitized using a Minolta 910 laser scanner, and then created the 3D model from photos using photogrammetry and improved in 3ds max. They present advantages and drawbacks of these two procedures and characteristics of the obtained models.
 
This report presents the potential of close range photogrammetry for mining and reclamation. The mining reclamation community depends on accurate mapping for almost all activities. Traditional ground surveys are adequate for small, uncomplicated jobs but at some point, the size and or complexity of a project makes it more economical to have a site flown (mapped using aerial photogrammetry). Because of cost, most projects are only flown at the start and less often when completed. Close Range Photogrammetry (CRP) offers much potential for measuring features that cant or aren’t being measured otherwise.
 
The study of archaeological artifacts requires a great care for the object. Current technologies allow the study of the object scanned in three dimensions. Hence, the digitization of objects has almost become compulsory for simplicity of study and analysis. Hence a low cost solution susceptible of being operated with reasonable effort could contribute to popularize 3D acquisition tools. In our study, we focus particularly on two solutions: David Laserscanner and PhotoModeler Scanner. Both systems come from two different techniques: laser scanning and photogrammetry.
 
Since a couple of years, several commercial solutions of dense stereo matching have been developed. This process offers a really cheap, flexible and accurate solution to get 3D point clouds and textured models. The calibration of the camera allows a subpixellar correlation for correctly textured objects. In order to define the limits of such a process for cultural heritage applications, the Photomodeler Scanner software has been tested on an archaeological site.
 
What is unique in this study is that accuracy was assessed on a system with four independent cameras and all those cameras were consumer-grade cameras with zoom lenses. This is a configuration one might use for a low-cost PMV system (for tracking object movement and shape change over time).
 
This paper describes a method for the acquisition of the flying shape of spinnakers in a twisted flow wind tunnel. The method is based on photogrammetry. Results are shown comparing design versus flying shape of the spinnaker and the impact of wind velocity and wind twist on the flying shape.
 
“Eos Systems (Vancouver, BC, Canada) has released version 6.3 of PhotoModeler, its image-based modeling photogrammetry — software for generating and measuring 3D models from photographs. Key enhancements, according to the company, include expanded automation and RAD Targets that help you obtain 3D measurements and 3D point sets accurately and efficiently. The new version is said to let you capture and measure a wider variety of scenes and objects and, of interest to existing users, it provides improved speed and lower costs of operation.”
 
Several studies have developed photogrammetric techniques for indirect mass estimation of seals. Unfortunately, these techniques are often narrowly delineated for specific field scenarios or species. Many require sophisticated, custom-designed equipment or analytical tools, limiting their applicability. We aimed to devise a photogrammetric technique for accurate volume mass estimation of seals under a variety of field scenarios without manipulation of the animal and with minimal equipment.
 
The vibration response of a model airplane is animated as the result of real-world experimental study of modes. The structural data is captured in 3D by PhotoModeler.
 
Photo modeling technology has progressed to the point where a dimensionally accurate 3D model can be economically constructed from a series of digital photographs of a structure. We show in this article how a photo model of a structure can be used to create an FEA model from which the modes of the structure can be calculated. The FEA mode shapes obtained from the photo models are then compared with the experimentally derived mode shapes of each structure to demonstrate the validity of this approach to FEA modeling.