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Topics - SimonBrown

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General / AccuPixel Mentoring Program - Becky Kagan Schott
« on: October 09, 2021, 11:53:42 AM »
AccuPixel launch a mentoring program for photogrammetry and Metashape.

Full details in the link:

https://accupixel.co.uk/2021/10/09/accupixel-mentorship-becky-kagan-schott/

We would also wish to thank Agisoft for their support.

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General / Transform Script - Free For All
« on: August 27, 2021, 10:27:32 AM »
AccuPixel Technical Director Jose has very kindly released a Python script to aid the Transform commands for View, Region and Object - full details and how to download here:

https://accupixel.co.uk/product/metashape-script-transform-assistant/

We are very grateful to Geobit Consulting for making this available at zero cost...and to Alexy for the changes required for Metashape Pro 1.7 release.

Any and all feedback most welcome - we hope you find the script useful.

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General / Metashape Pro and Mountain Biking
« on: August 20, 2021, 03:06:58 PM »
Could photogrammetry help mountain biking?

When it comes to measuring and creating objective evidence of trail erosion it certainly has potential:

https://accupixel.co.uk/2021/08/20/objective-evidence-measuring-the-wear/

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General / Metashape Professional and Coral Reef Measurement
« on: June 05, 2021, 11:36:28 AM »
AccuPixel are collaborating with the Submerged Resources Center of the US National Parks Service with the intention of pushing the boundaries of underwater photogrammetry, working with multiple cameras and UWIS underwater GPS positioning data.

More details here:

https://accupixel.co.uk/2021/06/03/national-parks-service-collaboration-with-accupixel/

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General / Metashape Professional Big Bundle Deal
« on: April 09, 2021, 11:58:04 AM »
For anyone needing a Metashape Pro license, AccuPixel have teamed up with https://dronelab.io and https://construkted.com and are offering a bundle deal that includes the software, Agisoft-endorsed training plus 12 months hosting for sharing & showcasing those models and ortho photos with clients and the public.

More details can be found here:

https://accupixel.co.uk/2021/04/07/accupixel-big-bundle/

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General / Python Scripting - Subject Matter Experts Please Step Forward
« on: November 27, 2020, 01:47:15 PM »
https://accupixel.co.uk may have a need for some custom python scripts to support projects over the forthcoming 12 months.

So we are looking to put a list together of python programmers - the coders who really understand Metashape Pro and who can work to a set of requirements and deliver a script for us to run.

For now, please just respond to this post and we will be in touch thereafter.

Samples of work would be preferred - not necessarily the actual script but a worked example will be fine for now.

This will be a paid role and we are not looking for freebies.

7
It is with great pleasure Jose Martinez Rubio and myself can announce the launch of Metashape Standard online training - endorsed by Agisoft themselves.

Self paced and online the course is split into two halves; photography for photogrammetry followed by Metashape workflow. The joint goals are to ensure source images are created with photogrammetry in mind, and the Metashape workflow is as efficient as possible.

More news details about the course here:

https://accupixel.co.uk/2020/09/30/agisoft-endorsed-metashape-training/

The course has no time limit and will remain open to all students as an ongoing reference.

Accupixel Ltd is our joint venture created to support a recent tender award by UK police forces .Both Jose and myself are exceptionally grateful and humbled by Agisoft's endorsement of the online course.

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General / Classifying the Ortho Photo
« on: June 27, 2019, 12:11:28 PM »
I'm aware we can classify objects and features in the dense cloud. Automated tools exist in Metashape to automatically identify roads, vegetation etc.

But is anyone aware of a means to identify or mark the same object types/surfaces in the ortho photo?

Basically, I have a massive ortho photo and have lots of objects distributed within and would like to automatically identify their location - perhaps by adding a layer to the image and adding coloured shapes to indicate their location visually - in the ortho photo.

This is, I think, outside of Metashape (for now...) so open to all suggestions.

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General / DAE export and setting the default camera
« on: July 31, 2018, 03:03:35 PM »
I'm working on an iBook project and this will involve 3D content derived from Photoscan Pro.

iBooks only supports .dae collada format, which is fine as Photoscan can export this.

However, the recommendation from iBooks is to set a default camera - the view that you wish the initial, starting image of the 3D model in iBooks to be.

There is an option in Export to "Include cameras" and this appears to set the first aligned camera to be the default view. It also appears that if you strip out 999 from (say) the 1000 aligned images then the single remaining camera is then selected as default in the dae file. By stripping out the unwanted cameras you can kind of set the default view, as long as one of the aligned images was taken with that in mind.

However, this is less than ideal. When working underwater it is very rare we can take a single image that encompasses the view we want - visibility often restricts our view and we cannot simply back off from the subject and shoot such an image - so the default view is zoomed into the 3D model. Underwater, we are always working very close to what are often massive subjects.

What I would like to do is orientate the model on screen to a suitable orientation and then say "this view is my default camera for dae export".

I have not found a way to do this - any advice from the forum would be most appreciated.

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General / Orthomosaic generation - Mesh vs DEM
« on: September 11, 2017, 11:25:04 AM »
I'm now generating orthomosaics from every model I produce. The ability to review an underwater site in the comfort of your own home (and not get wet) is a great way of investigating what is on the seabed.

Example:

http://deep3d.co.uk/2017/08/23/bolt-bay-p47-d-crash-site/

When generating an orthomosaic there are two choices as to what to base the results on:

Mesh
DEM

I'm running a very large orthomosaic now (5 acres of shipwreck - 1 pix = 7.5mm) otherwise I would test it, but what are the differences? Any advantages over using the DEM vs the Mesh?

I am guessing it would be possible to generate a DEM from the sparse cloud and then derive the orthophoto from that, missing out the dense cloud and mesh, but would be interested to hear the experiences of others?

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Python and Java API / Split in Chunks - Copy Model
« on: August 26, 2017, 03:46:49 PM »
Scripting newbie question:

I use the split_in_chunks script quite a lot (thank you to whoever authored it!) and its very useful.

I now have a situation where I want to split a chunk into separate chunks, duplicating not only the dense cloud/cameras but the 3D model as well.

I *think* I have found the section in the script:
 new_chunk = chunk.copy()
      new_chunk.label = "Chunk "+ str(i)+ "\\" + str(j) + "\\" + str(k)
      new_chunk.model = None
      doc.addChunk(new_chunk)

With the command that deals with the model in bold. I have checked the reference manual, but cannot find an example? I am guessing the None needs to be something else, and have tried a few guesses but no luck.

Can anyone help?

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Python and Java API / Newbie - error running a script.
« on: April 13, 2017, 08:01:55 PM »
Having recently upgraded to 1.3.1.4 I now find the following script:-

http://wiki.agisoft.com/w/index.php?title=Split_in_chunks.py&oldid=207

This script is really, really useful. Its a godsend for larger models such as this one:-

https://sketchfab.com/models/99d9f126ea0647f79e761d3cd2c1fca0

Created over 6 or 7 dives and now has nearly 10k images.

However, running the script triggers the following errors in the console:-

2017-04-13 17:47:31     class SplitDlg(QtWidgets.QDialog):
2017-04-13 17:47:31 NameError: name 'QtWidgets' is not defined

Can anyone suggest a fix for this one? its making me tear my hair out!

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General / Hosting and Publishing Orthophotos
« on: April 24, 2016, 06:24:31 PM »
So I have generated a few orthophotos of some underwater 3D models.

The results are very impressive, and worthy of publication, but both Mpabox and 4DMapper (the two API-ready hosts that come with Photoscan Pro) are really geared around GPS/mapping.

Mixing underwater and GPS is possible (and we are working on it) but in absence of GPS data, is there anywhere that hosts orthophotos in a way that makes a 139Mb JPEG orthophoto actually usable by the general public?

Sample models:-

https://sketchfab.com/models/c0dc76861241475b8e8ecaca56514c68

https://sketchfab.com/models/417253342c924739a60d6478b54f6c28

Looking forward to the replies.

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Feature Requests / Size of Marker ID text
« on: November 30, 2015, 07:16:34 PM »
When using Photoscan Professional -> Tools -> Markers -> Print Markers.

Relative to each printed Marker there is a number that can be used to ID the marker. Relative to the printed marker, the printed number is quite small.

Would it be possible to allow users to set a preference that controls the size of the text printed alongside the marker?

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General / Adding thickness to model
« on: September 04, 2015, 10:51:53 AM »
We are now printing in plastic the first 3D models of underwater artefacts and shipwreck remains, and the exported STL files from Photoscan are coming out very well indeed.

But the actual printing process can struggle with models with a greater level of texture/detail, and its necessary to build a printed frame around the model to help it build. Here's an example:-

https://www.facebook.com/theshipwreckproject/photos/a.128279717253739.33108.127175257364185/885165258231844/?type=1&theater

And the model itself:-
https://sketchfab.com/models/9d3ff4db7fca4471a2cd5e50ce4ee237

So ideally what I would like to do is add thickness to the surface in one direction only (the seabed side in this case) that will help the model build.

Has anyone found a tool or application that will add thickness to a surface? This is more in the realm of 3D CAD perhaps, but hoping someone here might be able to help?

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