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Rock Art Archives // GU Historiska Studier
เข้าร่วมเมื่อ 6 พ.ย. 2020
A channel from The University of Gothenburg Department of Historical studies run by Rich Potter and Christian Horn which incorporates the activities from the SHFA (Swedish Rock Art Archive) and other projects around the department.
Rich and Christian primarily work with 3D and 2.5D documentation of Rock art, as well as 3D visualisation projects within archaeology and history. We also work with AI and other tech.
The Department of Historical Studies provides a meeting place for students and researchers interested in the subjects of Ancient History, Archaeology and History. Research conducted at the department focuses on human societies from the Paleolithic to the modern era. Departmental researchers include experts in both prehistorical and historical periods, such as the European Bronze Age, Ancient Greece and Rome, and the Nordic Middle Ages.
Rich Potter: www.gu.se/en/about/find-staff/richardpotter
Christian Horn: www.gu.se/en/about/find-staff/christianhorn
Rich and Christian primarily work with 3D and 2.5D documentation of Rock art, as well as 3D visualisation projects within archaeology and history. We also work with AI and other tech.
The Department of Historical Studies provides a meeting place for students and researchers interested in the subjects of Ancient History, Archaeology and History. Research conducted at the department focuses on human societies from the Paleolithic to the modern era. Departmental researchers include experts in both prehistorical and historical periods, such as the European Bronze Age, Ancient Greece and Rome, and the Nordic Middle Ages.
Rich Potter: www.gu.se/en/about/find-staff/richardpotter
Christian Horn: www.gu.se/en/about/find-staff/christianhorn
Point Confidence Filtering in Agisoft Metashape
00:00 - Intro
00:24 - How to filter points
01:42 - Removing filtered points
02:21 - Conclusion
00:24 - How to filter points
01:42 - Removing filtered points
02:21 - Conclusion
มุมมอง: 6 520
วีดีโอ
Rock art and Geoscience in Tanum
มุมมอง 2273 ปีที่แล้ว
Christian Horn, Ellen Meijer and Mark Peternell from the SHFA and Gothenburg University's Historiska Studier and Geography department visit Kville 408/409 and begin to record it. In this video Mark and Christian introduce a new method using an ultrasonic sensor. An overview of the results from the site will be presented in a later video.
LiDAR Scanning a Cairn in Alingsås with an iPhone
มุมมอง 3.2K3 ปีที่แล้ว
Christian and Rich visit a cairn in Alingsås and record it using the Apple LiDAR camera and Polycam on an Apple iPhone 12 Pro Max. Christian talks through the results of the scan in Meshlab. Polycam - poly.cam/ Meshlab - www.meshlab.net
Roman Kiln 3D Reconstruction Timelapse
มุมมอง 3503 ปีที่แล้ว
A timelapse of the Roman Kiln Reconstruction Rich created using material from the archaeological project by Career in Ruins.
Skepplanda 20:1 - Rock art documentation (SFM, vRTI)
มุมมอง 9043 ปีที่แล้ว
Christian and Rich document and evaluate one of the Rock Art panels at Skepplanda, Sweden using SFM and vRTI. Fornsök website for the site: app.raa.se/open/fornsok/lamning/6dbd3647-b38f-404b-bb32-d40850932f29 Gothenburg University Department of Historical Studies: www.gu.se/historiska-studier SHFA website : www.shfa.se/
Apple LiDAR and Archaeology - Lawrence Shaw
มุมมอง 7K3 ปีที่แล้ว
A review and overview of the Apple LiDAR camera for use with archaeology by Lawrence Shaw from Forestry England. Hear more from Lawrence on his podcast, Career in Ruins: careerinruins.com/ Links in Video: Polycam: poly.cam/ Sitescape: www.sitescape.ai/ Alban's twitter: albn Alban's blog post: albn.medium.com/3d-scanning-with-the-iphone-lidar-8cbd723fc9ab Sketchfab: sketchfab.com/
What can you use the 3D models for?
มุมมอง 5743 ปีที่แล้ว
00:00 - Introduction 00:27 - Meshlab 01:24 - Digital Rubbings 02:05 - Digital RTI 02:30 - Sketchfab 03:04 - PDF 03:25 - Conclusion Meshlab : www.meshlab.net/ Sketchfab : sketchfab.com/ Our article on Digital Rubbings: www.researchgate.net/publication/335292236_An_evaluation_of_the_visualisation_and_interpretive_potential_of_applying_GIS_data_processing_techniques_to_3D_rock_art_data
Installing Agisoft Metashape
มุมมอง 3.6K3 ปีที่แล้ว
00:00 - Introduction 00:08 - Metashape Versions 01:07 - Installation 01:50 - Licensing 02:23 - Conclusion Agisoft Download Page: www.agisoft.com/downloads/installer/
Local Coordinate Systems and DEMs
มุมมอง 1.5K3 ปีที่แล้ว
00:00 - Introduction 00:06 - Creating a Local Coordinate System 01:31 - Building a DEM 01:55 - Exporting a DEM 02:23 - Conclusion
Building and Exporting a Textured Mesh from Agisoft
มุมมอง 9K3 ปีที่แล้ว
00:00 - Introduction 00:09 - Aligning Photos 02:43 - Dense Point Cloud 05:41 - Building a Mesh 07:56 - Texturing the Mesh 08:53 - Exporting the Textured Mesh 09:24 - Conclusion
SFM Photography
มุมมอง 4893 ปีที่แล้ว
00:00 - Introduction 00:09 - Cameras 01:26 - Target points / GPS 02:03 - Picking a surface / object 02:52 - Considerations 03:28 - Flat Surface SFM 04:22 - Object SFM 05:06 - Conclusion
Introduction to Agisoft
มุมมอง 8043 ปีที่แล้ว
00:00 - Introduction to Agisoft 01:56 - Chunks 02:46 - Importing Photographs 03:11 - Masking Photographs 04:50 - Conclusion
RTI Setup
มุมมอง 4133 ปีที่แล้ว
00:00 - Introduction 00:14 - Equipment Setup 03:17 - Camera Setup 04:40 - Conclusion
RTI Equipment
มุมมอง 3453 ปีที่แล้ว
00:00 - Introduction 00:05 - Camera 00:30 - Lenses 01:11 - Flash 01:40 - Tripod / Monopod 02:22 - Reflective Spheres 03:02 - Triggers 03:28 - Conclusion
RTI Viewer
มุมมอง 1.1K3 ปีที่แล้ว
00:00 - Opening PTM files 00:47 - Movement of Light 01:38 - Default Settings 02:14 - Diffuse Gain 02:54 - Specular Enhancement 04:12 - Normals Visualisation 04:43 - Zooming 05:08 - Bookmarks 06:20 - Snapshots 06:50 - Conclusion
Very useful and straight to the point! Thank you!
Thank you so much for these tutorials
Thank you for the great video. Why does the model doesn't export as .obj and instead it does as a jpg file?
The .jpg file is likely the texture for the .obj file which should also export at the same time. You should also have a .mtl file which links the two together. Try creating a new empty folder and then exporting to there to check that everything gets exported correctly.
Thanks for making this! Very clear and straightforward.
Hi. Thanks for video. But ı have problem about this. I cant find PTMFilter.exe from RTIbuilder_v2_0_2\Plugins\PTMfitter. Can u help me? I only have PTMfitterPlugin.jar in the folder.
Hi! You need to download the PTM fitter exe file and add it manually to the folder. I show you how to do this in the following - th-cam.com/video/8HrSg3SbAuw/w-d-xo.htmlsi=LU6fOp6DS3ANVZEI&t=126 Good luck!
What sort of lens are you using?
What is RTI? I watched a little bit of this video even though it wasn't was I was looking for lol
Thanks for this. I got excited about using my iPad of archaeology here in coastal BC Canada. I agree, I was let down with my initial use of this and the iPad lidar is just a decent starting point.
thank you!1 this video was super helpful!!
Thanks for sharing information
This is the best video I have found that demonstrates how to use the RTI Builder. Thank you so so much!
Thanks for this video, just got into RTI and it is a real good starter! Subscribed!
just got my 13 pro and will start playing with this! you have a new sub
Clear and simple, even I could understand it. Thank you.
It would help to say what you are doing instead of just saying a shortcut that doesn’t work on Mac.
As you won't make money out of your channel, would it be possible to disable the ads? If you feel like donating cash, there are more worthy causes than youtube ;)
Hi! We have no possibility to turn off adverts as our channel isn't big enough, unfortunately. Sorry!
Thanks for another great video. A question about flight planning and capturing the the most accurate data for DSMs. In the video you mention that DEMs can only be captured using a single orientation. Are you flying 2D with the drone camera at nadir? Or can DEMs be produced a 3D flight path with camera at an angle less than -90 degrees?
Thanks! Ideally you want your camera to be 90 degrees to the surface you are capturing, but this is often not feasible depending on terrain, time restraints and weather. You can produce a DEM from any model, regardless of the orientation of the camera as long as it aligns well and has reference points (real or local). I think what I was referring to was that you can only export a DEM at one angle from the software, so it won't work for 3D objects in the same way that a texture would, for instance.
This is the best view of the Metashape Pro workflow that I have seen. Thank you. Where can I find the other videos you referenced?
Thanks, glad you enjoyed it! These videos were originally produced as part of a course and as such not all are publicly available yet, unfortunately.
this was super ! thank you! What is the point of building the dence point cloud and not just go directly to mesh ?
Hi! Thank you! The dense cloud is a much more refined and detailed version of the sparse cloud which means that your final mesh will be more accurate and detailed with a higher poly count. Its also the best way to create DEM's (covered in another video) which are a key part of our process with rock art. There are also a number of tools that can only be used on dense clouds, like dense cloud confidence (which makes it super easy to remove low accuracy points). These are great, especially when you are making a full 3d model rather than just a surface. They also give you a good impression of the quality of your model and where improvements can be made. I just ran a small test to compare the poly counts of the final models - based off a dense cloud the poly count of the high res model was 5052321 polys, while based off the sparse cloud the poly count was 90000. It may be that you would want a low poly model to start with, but there are also better ways of doing this later on (e.g. decimate model -> create normal map so that you get the details of the higher poly model on the lower poly model). Hope this helps, if you have any more questions please feel free to ask!
@@rockartarchivesguhistorisk7591 This helps A LOT!!! Thank you so much for the answer !
Lawrence - thank you for an excellent video. I am an Architect and need to collect/collate; as you state: " Dirty Scans". Inserting a measuring pole into the Lidar sketch-info, they give me the basic building form from which I can interpolate section, plan. Thus, building structure related to vernacular details. I am talking about working in the Far East where I am just now. Having the ability to collect both the specific building elevation; to be surveyed on-the-fly, and approximate heights, in addition to adjacent buildings, is very useful to me. Thank you so much for this video as it tells me enough to know how and where I need to use my skills to record and detail the necessary information to my archives. Already, while rcording the disappearing traditional building heritage, one day I went off to collect my survey gear and within that day, the particular building listed was demolished and disappeared. Therefore, this form of recording buildings is invaluable to me.
Hi! Can you describe how to install the fitter in the plugins by mac ?
Hi Tom, sorry for the later reply. It should be exactly the same process, just make sure you choose the mac version of the plugin when you get to the ptm fitter dropbox link in the description. Put the file in the equivalent place on your mac as described for windows in the video and you should be set!
förnarp? var är det?
Tack för fragan. Frännarp är en hällristningsyta i Skåne med riksantikvarieämbetenummer Gryt 1:1. Förlåt för hur jag uttalade det, svenska är tyvärr inte mitt första språk.
The soundtrack is epic!
Nice vid. Love the soundtrack