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Messages - SimonBrown

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General / Re: Metashape Professional and Coral Reef Measurement
« on: June 12, 2021, 11:04:56 AM »
Amazing work!  I am sure using UWIS GPS is improving processing performance for large projects but are you also finding significant accuracy improvements?

UWIS does three things:

Navigate - it helps us find the target quickly ( using a sonar overlay on the tablet.

Scale - merge the UWIS GPS data with cameras for reconstruction constraints (

Geo locate - whereabouts in the world is the subject and how does it relate to others?

We have a little app that takes camera and UWIS data and merges them - - and version 2 is under development right now, adding a few features to refine accuracy.

And whilst much of this has been available in the terrestrial arena, underwater positioning has been the preserve of military or oil field sized budget holders - until now.

So for us, UWIS adds significant capacity and capability.

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:

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 and 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:

Both Jose Martinez and myself are delighted to announce the availability of the Accupixel online training course for Metashape Professional.

This training builds on the Standard course and includes real-world worked examples and downloadable content to work at your own pace.  The good news is both Standard and Pro courses are included when purchasing the Pro course.

We are extremely grateful for the recognition by the authors of Metashape - this course is endorsed by Agisoft.

More details on the course can be found here:

General / Python Scripting - Subject Matter Experts Please Step Forward
« on: November 27, 2020, 01:47:15 PM » 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.

General / Re: Plans for detailed manual?
« on: November 27, 2020, 01:23:45 PM »
Its not the manual...but the Accupixel training course goes deeper into the process of photogrammetry and the Metashape workflow.

Plus its endorsed by Agisoft themselves:

This course will be the foundation of others to follow - the Professional course will build on this. We have started preparing the Pro course and tentative date for publication is early in the new year. Anyone signing up for the Standard course now will enjoy early access plus bundle discount.

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:

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.

General / Re: Underwater orthomosaic with no GPS data
« on: October 04, 2020, 05:56:58 PM »
Metashape Ortho mosaics are 100% the way to go with high resolution mapping of the sea floor:

With GPS:

Without GPS:

Both are scaled. Worth adding DEMs into the mix too:

Like Alexey says, working with GoPro video will require camera calibration before processing, otherwise curved models will be created, plus GoPro have rolling shutters (less than idea, but not as good as mechanical ones) and this can introduce distortion too.

I investigate vehicle collisions and I use Metashape to document collision scenes and damaged vehicles, which I then import into other tools to undertake crash reconstructions.

Do please drop me an email - I'm UK based and I think it would be worth us having a chat?

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.

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.

General / Re: Orthomosaic generation - Mesh vs DEM
« on: September 12, 2017, 04:50:25 PM »
Thanks JMR - a very good explanation.

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.


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


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?

Python and Java API / Re: Split in Chunks - Copy Model
« on: September 03, 2017, 01:20:20 PM »
Thanks Alexey - much appreciated.

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

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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