Category Archives: How to

Photogrammetry tutorial 13: How to handle a project in Reality Capture

Well, this is a long overdue post, and I could have saved myself a lot of emailing if I’d written it earlier. Basically, it is a sibling, even a twin to my tutorial on how to handle a project in … Continue reading

Posted in 3D modeling, How to, photogrammetry | Leave a comment

Photogrammetry tutorial 12: my workflow for Agisoft Photoscan as a diagram

The last tutorial on how to handle a project in Agisoft Photoscan Pro describes all the steps I usually do in some detail. Here, I’ll show you a flow diagram, which gives a nice concise overview for those who do … Continue reading

Posted in Digitizing, How to, photogrammetry | 2 Comments

Speeding up Photoscan’s dense cloud generation, 2018 version

Previously, if you wished to speed up the dense cloud creation by altering the settings for the number of pairs for the depth filtering, you had to use a rather complicated approach, and it only worked in the Pro version. … Continue reading

Posted in Digitizing, How to, photogrammetry | 1 Comment

Photogrammetry tutorial 12: How to preserve strike and dip or cardinal directions in your 3D model

Photogrammetry is a really nice and easy way of surface digitizing specimens in collections, but also useful in the field. Recently, Marie Attard, a colleague working in England, asked me to help with a project that deals with rock surface … Continue reading

Posted in Digitizing, How to, photogrammetry | 3 Comments

Photogrammetry tutorial add-on: The consequences of optimizing a sparse point cloud

If you build a photogrammetric model following the workflow I suggest in this post, one of the steps is optimizing the sparse point cloud (tie point cloud) via gradual selection and deletion of points. Here’s why that matters. Below you … Continue reading

Posted in Dinosauria, How to, photogrammetry, Sauropoda, Sauropodomorpha, Tendaguru | 12 Comments

Photogrammetry tutorial 11: How to handle a project in Agisoft Metashape (Photoscan)

EDIT April 29, 2020 Up to speed with the latest version of Metashape. Note that there is a mesh creation method directly from depth maps. I am not happy with it, and for reasons given below I doubt I ever … Continue reading

Posted in Conferences, digiS, DigitalSpecimen 2014, Digitizing, How to, MfN Berlin, photogrammetry | 41 Comments

Photogrammetry tutorial 10: an improved method for mid-sized objects

Last December I was granted a sack full of money by the Senatskanzlei Berlin for the 2015 digiS programme. I’ll soon post more about that; what matters for this post is that I promised to mass digitize the rather unwieldy … Continue reading

Posted in 3D modeling, Digitizing, Dinosauria, Giraffatitan, How to, MfN Berlin, photogrammetry, Sauropoda, Sauropodomorpha | 10 Comments

Photogrammetry tutorial 9: Quick and dirty!

Over the course of previous tutorials and in my paper with Oliver Wings I’ve given quite a bit of advice on how to photogrammetrize objects properly. Today, I’ll address the other end of the spectrum: how to approach photogrammetry unprepared … Continue reading

Posted in AMNH, Digitizing, Dinopics, Dinosauria, How to, photogrammetry, Theropoda, Tyrannosauridae, Tyrannosaurus | 6 Comments

snaphots

“snapshot” – that word is usually used to describe an amateurish photograph (unless you are talking about a screen capture on your computer). But the term is not so much tied to the low level of professional knowledge as rather … Continue reading

Posted in Aves, Dinopics, Dinosauria, How to, photography, Theropoda | 2 Comments

Photogrammetry tutorial 7: multi-chunk project handling

In palaeontology (and many other disciplines) you often deal with specimens that you wish to capture in what I term “720°” – all around (360° around it for the vertical axis), and bottom and top, too (360° around the transverse … Continue reading

Posted in 3D modeling, Digitizing, Dinopics, Dinosauria, Giraffatitan, How to, MfN Berlin, photogrammetry, Sauropoda, Sauropodomorpha | 3 Comments

PHOTOGRAMMETRY IN PALEONTOLOGY – A PRACTICAL GUIDE

While I was on holiday my latest paper finally went online. It is a joint effort with Oliver Wings that details some good approaches for photogrammetric 3D modelling specimens. You can find the PDF at this link. The web version … Continue reading

Posted in 3D modeling, AMNH, Conferences, DigitalSpecimen 2014, Digitizing, Dinopics, Dinosaur models, How to, Khaan, Maniraptora, Open Access publishing, Oviraptorosauridae, papers, photogrammetry, photography, Theropoda | 5 Comments

How to easily de-conflict event timings for conferences

Today’s topic has nothing to do with dinosaurs, but it is something some of you may encounter every once in a while. Let’s say you’re planning a conference with many events – talk sessions, poster sessions, workshops, whatnot. Obviously, you’ll … Continue reading

Posted in Conferences, DigitalSpecimen 2014, How to, non-palaeo | 1 Comment

Photogrammetry tutorial 1: equipment

Taking photos for photogrammetry can be dead simple, or it can be a fiendishly difficult task. It all depends on the specimen you want to get a 3D model of. Here’s a not-so-short guide on how to ensure that your … Continue reading

Posted in 3D modeling, Digitizing, How to, photogrammetry | 13 Comments

Using Hugin part 4: mosaic images

“What is a mosaic image?” people typically ask when I use the term. I explained it before, so I’ll just c&p: Mosaic images A mosaic is created by stitching (planar) photos together where each picture is taken from a different … Continue reading

Posted in How to, playing with photos | 7 Comments

Using Hugin part 3: aligning and cropping only (medium difficulty)

Sometimes, you want to align photos, and remove barrel distortion maybe, but you do not want to stitch them. I detailed one example before, aligning photos for HDR. Typically, this does not work too well in graphics programs if you … Continue reading

Posted in How to, non-palaeo | 1 Comment