Messages

31

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/

32

General / Re: Fragmented reconstruction (underwater)

« on: August 18, 2021, 03:11:40 PM »

Whilst the video may be continuous this does not guarantee success when it comes to aligning. Image blur caused by movement, out of focus, lack of detail & tie points will all trigger failure to align - take a close look at the images and see if there is any pattern to failure.

26 USBL measurements over 10 minutes will require interpolation to estimate the image locations for every frame between those taken at the same time as measurement - I would hesitate to suggest this will help with alignment or deliver a scaled model.

Extracting images from video will mean cameras are treated as N/C - not calibrated - and whilst Metashape can estimate the lack of focal length may be causing alignment issues.

ROV cameras tend to be good for seeing what is in front of the lens...to record video in low light...and guide the operator...they may not deliver high quality stills that work best for photogrammetry - can you share camera data?

We use a similar technique but work with GPS points taken every 2~4 seconds. Using these for scaling delivers very consistent results but would not use these values to aid camera alignment:

https://accupixel.co.uk/2021/07/26/new-release-gps-position-processing/

Not all images will need GPS reference for scaling and location, so the first steps would be to validate the source image quality, rerun alignment and then apply GPS values during recursive optimisation.

33

General / Re: Accupixel Metashape Professional Online Training - Endorsed by Agisoft

« on: June 14, 2021, 06:08:02 PM »

Jose and myself have recently added two topics dealing merging photogrammetry with laser scan data into the Professional online training course:

https://accupixel.co.uk/2021/05/25/merging-data-photogrammetry-laser-scans/

Access to new material for all existing students is included.

34

General / Re: Metashape Professional and Coral Reef Measurement

« on: June 14, 2021, 06:01:29 PM »

What's the cost of a  UWIS GPS system?

It really depends what your needs/requirements are, but for single diver tracking then this:

https://accupixel.co.uk/product/uwis-tracker-single-diver-rov/

Would get you started. This would also enable merging of camera positions with GPS data via our App (Accupixel are the UK dealer for UWIS and customers get the app).

Tablet for bidirectional comms and navigation is extra, as is additional tracker units.

Hope this helps?

35

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 (https://deep3d.co.uk/2021/04/23/back-in-the-water/) using a sonar overlay on the tablet.

Scale - merge the UWIS GPS data with cameras for reconstruction constraints (https://deep3d.co.uk/2020/02/04/accuracy-defined/)

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 - https://deep3d.co.uk/2020/06/03/you-need-an-app-for-that/ - 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.

36

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/

37

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/

38

General / Accupixel Metashape Professional Online Training - Endorsed by Agisoft

« on: February 19, 2021, 04:23:34 PM »

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:

https://accupixel.co.uk/2021/02/19/accupixel-launches-professional-training-course/

39

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.

40

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:

https://accupixel.co.uk/metashape-training-courses/

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.

41

General / Accupixel Metashape Professional Online Training - Endorsed by Agisoft

« on: October 04, 2020, 06:04:31 PM »

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.

42

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:
https://dronelab.io/map/public/viewer/4d3ca968df624f7abf10f10f71bd6c1a

Without GPS:
https://dronelab.io/map/public/viewer/5be1f1e86b924bae9fef7ce209fd35e0

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

http://deep3d.co.uk/indexes/tips-tricks-and-news/dem/

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.

43

General / Re: New Professional user looking for advice about 'online training'

« on: May 01, 2020, 10:14:51 PM »

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?

simon.brown@deep3d.co.uk

44

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.

45

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.