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Survey Grade Accuracy with a Drone without Ground Control !

Posted on Tuesday, November 8th, 2016

To get high accuracy with a drone photo-based survey, one usually needs to place and survey ground control points. Ground control points are either man-made targets (e.g. large cross) that you place on the ground before the flight, or visible natural features, surveyed with a high accuracy instrument (total station or RTK GPS). To achieve…Read More

Accuracy of Pile Volume Measurement with Photogrammetry

Posted on Monday, November 4th, 2013

Accurate volume measurement of piles of material is important in a number of applications, such as: stock pile inventory management, volumes of tailing piles, volume of organic materials in composting operations, quarry pit size, mine reclamation, etc. These piles are difficult to measure due to their size, difficulty of traversing, and non-uniform shapes. The advent…Read More

Capturing Motion with Photogrammetry and PhotoModeler

Posted on Friday, October 11th, 2013

In this post I highlight the practical uses of PhotoModeler Motion (PMM), and feature two example projects. PhotoModeler Motion / PMM is the top of the PhotoModeler product line. It brings the time dimension into your measurement and modeling projects. PMM includes all features of PhotoModeler and PhotoModeler Scanner, and adds modeling of a dynamic…Read More

Using the GoPro Hero 3 for 3D Photogrammetry Modeling and Measuring

Posted on Monday, September 23rd, 2013

  Introduction The GoPro Hero 3 is a small, lightweight, robust, low cost, and high definition video and still camera used primarily for capturing action.  The GoPro Hero 3 Black is one of the recent high resolution versions of the GoPro lineup that can be used for photogrammetry – the science of measurement, modeling and…Read More

Photogrammetry helps police clear accident scenes quickly and safely

Posted on Wednesday, August 21st, 2013

Car accidents are an ordeal for everyone. They’re traumatic for the people involved, of course, but they also affect everyone else on the road. The more serious the incident, the more likely that multiple lanes will be blocked, and the longer it will take to get it cleared. The police officers at the scene have…Read More

Camera Fundamentals and Parameters in Photogrammetry

Posted on Monday, July 29th, 2013

Photogrammetry is the science of using photographs to obtain measurements and models of real-world objects and scenes. Photogrammetric techniques involve using known information to help solve other, previously unknown information.  Several critical pieces of known information concern the camera used to capture the photographs, and defining those pieces in mathematical terms known as camera parameters.…Read More

PhotoModeler’s Dense Surface Modeling Accuracy Study

Posted on Thursday, September 20th, 2012

  We have completed an extensive accuracy study of PhotoModeler’s 3d scanning capability called Dense Surface Modeling (DSM).  The full accuracy study article can be found here: Quantifying the accuracy of dense surface modeling within PhotoModeler Scanner. The article shows that PhotoModeler Scanner can match (if not exceed) the accuracy of a laser scanner. Using…Read More

PhotoModeler – what’s in there?

Posted on Wednesday, February 1st, 2012

At Eos we like to think of PhotoModeler like an onion.  For many tasks you’ll find the standard operations, that are front and center, are all you need.  For other tasks you’ll discover that PhotoModeler offers a wealth of feature-rich layers, giving you the power to efficiently and accurately handle complex 3D measurement projects. Many…Read More

New PhotoModeler Geology Article

Posted on Friday, January 28th, 2011

A new journal article describes a technique using PhotoModeler for the measurement of inaccessible geological features. Details here – look for “Using Close Range Photogrammetry to Measure the Position of Inaccessible Geological Features”.

New PhotoModeler Whitepaper

Posted on Tuesday, August 11th, 2009

A new white paper titled “A New Way to 3D Scan” has just been published on our site. Here is an excerpt: Introduction Do you need to create dense 3D point clouds and detailed surface models of physical objects, and do you want to do it in a cost-effective and efficient manner? A new class…Read More


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