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CHI's Resources for Photogrammetry Users

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Cultural Heritage Imaging (CHI) offers some free resources to people adopting the practice of photogrammetry. In addition, our experts are available for paid consulting and/or training.


 

Here are some resources not to be missed.


 

1.  Videos describing key principles of good photogrammetric capture:


 

See also our Photogrammetry technology overview:


 


2. This, our free user forum, where folks in the community help answer questions about RTI and photogrammetry.  We aim to complement the resources offered by Agisoft PhotoScan and other software packages, as they have their own communities. However, discussions about equipment, capture tips, and so on are welcome here: http://forums.culturalheritageimaging.org/


 

3. We sell calibrated scale bars that help users get precise, real-world measurement into your product. And we offer a "tips and tricks" free guide for working with scale bars on the Photoscan website (find the link on this page):


 

4.  We offer regular 4-day training classes in photogrammetry in our studio in San Francisco and in other locations. Sometimes a host institution will offer space and will purchase some seats and allow some seats to be sold. You can learn more about our photogrammetry training here:


 


5.  And finally, we offer custom consulting to help folks adopt and use photogrammetry and RTI. That can take a variety of forms, including video, emails, and projects in Dropbox where we can review work and give feedback.  Learn more about our consulting offering here: http://culturalheritageimaging.org/What_We_Offer/Consulting/

 


 

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thank you for the resources! It's great...but it not will show any suggest workflow in agisoft... Can you explain that step?

for example, the best key point and tie point in align photos...

thank you

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Shahin,

I think the answer is "it depends"! - it depends on what you're trying to image - a small artefact or a building; it depends on what version of PhotoScan you're using (and just to confuse things, they have renamed it from PhotoScan to Metashape with the release of version 1.5); it depends on the sensor used; etc.
Far and away the best place to search for help on PhotoScan is on the dedicated Agisoft forum - just search for "workflow" (almost 80 hits).
One thread to which I would particularly refer you to is https://www.agisoft.com/forum/index.php?topic=9485.msg43931#msg43931 which discusses the workflow developed by Tom Noble et al of the USGS, and that of Bob Meij.

(would also suggest this might be better in a thread of its own ....)

Dave

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On 2/10/2019 at 2:44 PM, Dave Martin said:

Shahin,

I think the answer is "it depends"! - it depends on what you're trying to image - a small artefact or a building; it depends on what version of PhotoScan you're using (and just to confuse things, they have renamed it from PhotoScan to Metashape with the release of version 1.5); it depends on the sensor used; etc.
Far and away the best place to search for help on PhotoScan is on the dedicated Agisoft forum - just search for "workflow" (almost 80 hits).
One thread to which I would particularly refer you to is https://www.agisoft.com/forum/index.php?topic=9485.msg43931#msg43931 which discusses the workflow developed by Tom Noble et al of the USGS, and that of Bob Meij.

(would also suggest this might be better in a thread of its own ....)

Dave

2

tnx,

dave,

I would like to know what setting is used for CHI project in PhotoScan... and how much times is spent to finish it?

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We are focusing on good practice for collecting image sets for photogrammetry - which is independent of the software used.  We feel that if people collect good image sets that follow the rules (as described in our videos) then they have useful information for now and the future contained in those image sets. Especially if they collect some metadata about what they are doing, their methodology, who was involved, the subjects and locations, etc.  We are developing tools for that called the Digital Lab Notebook.  While we do use Metashape (aka Photoscan) at this time, the methodology is not dependent on the software.  So our freely available public information is not about Metashape. We agree that the Metashape community forums are a great place to go for information about working with that software.

We do use an error reduction workflow in Metashape that is a bit different than the process most folks follow.  We teach that in our training classes.  We spend time looking at metrics and what they mean, and also trying to impart an understanding of the sfm photogrammetry approach, and how that informs the guidance we give on collecting image sets. Our goal is to impart knowledge rather than give a "cookbook" approach, so folks can deal with a variety of situations in their own work, and make the appropriate trade-offs to meet their needs.  This kind of material doesn't fit into a forum post.

Carla

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