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Why use Photogrammetry for Surveying and Mapping?

Posted on Tuesday, January 23rd, 2018

Photogrammetry has a long history of use in the surveying and mapping field. Photogrammetry can be used for point measurements or for generating point clouds. Compared to its chief rival, LiDAR (Laser Imaging, Detection and Ranging), point-cloud generation from photogrammetry is cost-effective, portable, and versatile, so it has always had a loyal following among practitioners. In recent years, however, interest in photogrammetry among surveying professionals has been enjoying a major boom. This trend has been catalyzed by the rise of affordable, commercially available aerial drones, or UAVs for short. UAVs provide a number of advantages which make photogrammetry even more accessible, and has led to a renewed interest in the technology. To understand why, let’s first take a look at…Read More

The Other Photogrammetry Automation – Coded Targets

Posted on Tuesday, January 9th, 2018

Photogrammetry Coded Target Examples

What are Coded Targets? Automation History Why Use Coded Targets? Coded Targets vs Smart Points Coded Target Examples and Applications What are Coded Targets? I am sure you’ve seen a bar code on product packaging. Bar codes are scanned by a laser that reads the pattern of white and black bars, and converts that into a unique number or ‘code’. The code can be used to identify the product at checkout. PhotoModeler’s Coded Targets are like bar codes, in that they uniquely identify something (in this case a point on an object or in a scene), but have three differences: the code is printed in a circle, making it easier to identify at all angles (including a slant), the code…Read More

Can Measurements be Made from Law Enforcement Body-Worn Camera Video?

Posted on Wednesday, December 20th, 2017

This is a guest blog post written by collision instructor, and active LE officer, Bobby J. Mullinax. See bio below. Why Use Body-Worn Camera Video for Measurements? Photogrammetry is a technique that uses images and photos to obtain accurate 2D and 3D measurements and diagrams of the real world. A body-worn camera stores a video that could possibly be used as a data source in photogrammetry for crime or accident scene forensics. You may not need to use body-worn cameras as the photograph source for your photogrammetry project, but you may find yourself in a situation where you have to. How many times has a crash or crime scene investigator been tasked with putting together a complex puzzle, only to find…Read More

PhotoModeler 2018.0 Release Improvements

Posted on Thursday, December 14th, 2017

The new PhotoModeler 2018.0 release has faster processing, robust Coded Targets, and gridded DEM export. The most significant improvements in PhotoModeler 2018.0 span the needs of a wide range of our customers: New Gridded Digital Elevation Model Export Smart Processing now for Coded Target Projects Smart Processing speed increase for large projects Orthophoto improvements Gridded DEM Export PhotoModeler has exported triangulated surface models for many years. It is common though, with GIS and geographic-based systems that deal with 2.5D surfaces (2D plus height), to represent a surface as a DEM (Digital Elevation Model). Typically, a DEM is a regular grid of cells, each with a height value. PhotoModeler UAS 2018.0 adds the ability to export gridded DEMs when creating orthophotos. …Read More

Using Photogrammetry in Court

Posted on Wednesday, November 29th, 2017

Court Room Gavel

This is a guest article by forensics consultant, and trainer, Dan Mills. Bio below. Anyone in a technical field that brings evidence to court must consider both the evidence they are presenting, as well as the admissibility of their methods. First, a definition of Admissible Evidence: Evidence that is formally presented before the trier of fact (i.e., the judge or jury) to consider in deciding a case. The trial court judge determines whether or not the evidence may be proffered. To be admissible in court, the evidence must be relevant (i.e., material and having probative value) and not outweighed by countervailing considerations (e.g., the evidence is unfairly prejudicial, confusing, a waste of time, privileged, or based on hearsay). Also termed competent…Read More

Capturing BIM Data: An Affordable Alternative to Laser Scanning

Posted on Tuesday, November 7th, 2017

Image of a pc notebook and architectural drawings

BIM and the Importance of Image Processing BIM is the process of designing a building collaboratively with just one coherent system of 3D computer models, rather than multiple sets of separate diagrams. This leads to huge savings in time and resources, more accurate estimation, and fewer mistakes and alterations due to loss of data. BIM data can then be used for on-going management and maintenance of the building. The field of construction design has been transformed by the rise of digital technology. First, hand-drawn blueprints were replaced by 2D CAD systems. Then, as computing power grew, this evolved into 3D CAD. BIM is the next stage in the computerization of construction design, allowing more complex projects to be undertaken than…Read More

Top PhotoModeler Videos for Learning

Posted on Monday, October 30th, 2017

Instructional tutorial videos are a great way to learn PhotoModeler.  We’ve recently done a few updates to the PhotoModeler tutorials: A new forensics single camera tutorial Some new voice overs Key videos on YouTube Newest Tutorial Video for Forensics We recently published a new tutorial that will be of interest to those doing forensic measurement from single images (esp. those taken by security cameras and dash-cams). A recent release of PhotoModeler added an improved way to compensate for lens distortion for the highest accuracy results – this video describes this process. This tutorial describes how to extract important measurements like heights and positions in a crime scene from a security or surveillance camera image. [Single Security Camera Tutorial Video –…Read More

Forensic Photogrammetry: A Case Study

Posted on Monday, October 16th, 2017

Forensic Playground photo repaired

This is a guest article by forensic imaging consultant Mike Mayda. Bio below. Why Use Photogrammetry in Forensics? Photogrammetry can be a very powerful tool in forensic analysis. It is often useful to have an accurate 3D reconstruction of an accident or crime scene, especially in cases where position, distance and perspective are important. Given the large number of photos taken at these scenes, photogrammetry can be a practical way for investigators, lawyers, and insurance adjusters to obtain better information. In addition, photogrammetry can be used to preserve or recover measurement data long after the on-scene investigation has concluded. This is valuable as it can often be months before an investigator re-examines a scene and discovers a new piece of…Read More

PhotoModeler in Accident Reconstruction and Trade Show

Posted on Monday, September 11th, 2017

PhotoModeler has been the premier photogrammetry tool for accident reconstruction and incident scene forensics for more than 20 years. Continuing with that tradition we announce two items: Upcoming AR Conference Booth Drones / UAV in Accident Reconstruction Page   Accident Reconstruction Conference PhotoModeler will have a booth at the 2017 ARC-CSI Crash Conference, September 18-21, 2017, at the South Point Hotel, Las Vegas, NV.  If you are attending the show please come by for a chat! We will be demonstrating the newest in drone / UAV use with PhotoModeler as well.   Using Drones in Accident Reconstruction PhotoModeler has been used since the early 1990s as a key tool in the accident reconstructionist’s toolbox. For the most part, until recently, this…Read More

PhotoModeler 2017.1 Release and Improvements

Posted on Monday, August 28th, 2017

PhotoModeler version 2017.1 was released Aug. 22nd, 2017. The 5 goals of this release: Add features to improve certain types of industrial measurement projects. Further improve capability, speed, and stability of SmartMatch projects. Add a project upload tool for easy communication with the PhotoModeler Support team. Provide the help file in a PDF format. Fix some bugs. Getting the update If you are a current user of PhotoModeler Standard, Scanner or UAS, and your maintenance agreement is up to date, use Check for updates (Getting Started dialog in the software) to get the latest, or see the Updates page. If you are a demo or a trial customer that wants to try the latest improvements you can re-download the software.…Read More


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