WebODM Stitching of RGB and Multispectral Drone Images and Sensor Calibration Features

Hello,

I am very thankful to the WebODM team by developing a best stitching tool. I am working on RGB and Multispectral drone imagery for agricultural field analysis. I have successfully stitched both RGB and Multispectral images separately. However, when I try to stitch both RBB and multispectral images together as I require the blue channel from RGB for analysis, **the WebODM provides me the final stitched image without the RBG channel. Please guide me in this regard. If it is possible to add a feature in WebODM to stitch both RGB and Multispectral images with all channels. Another important aspect in our analysis is to use the camera calibration features (radiometric calibration) for more accurate analysis. I am requesting you if it is possible to add this facility as well. **

Regards Muhammad Ibrahim Research Scientist, Department of Primary Industry and Regional Development, Western Australia.

Dec 11 '23 03:12 IbrahimUWA

Hey @IbrahimUWA :wave: could you share a small subset of your images? (That can be reconstructed? Something like 20-60 images).

Dec 11 '23 16:12 pierotofy

Hello Piero Toffanin, Thank you so much for your kind reply. Please find the attached Zip file containing both RGB and Multi-spectral images. Please let me know if you require more information.

Thank you.

Kind regards Muhammad Ibrahim[https://res.cdn.office.net/assets/mail/file-icon/png/zip_16x16.png]RGBandMultispectral.ziphttps://uniwa-my.sharepoint.com/:u:/g/personal/22675654_student_uwa_edu_au/EXtTFa86jNBJstTYBnjraKkBVS8E2eJBtJmfxWCs9ei3Ww

From: Piero Toffanin @.> Sent: 12 December 2023 00:59 To: OpenDroneMap/WebODM @.> Cc: Muhammad Ibrahim @.>; Mention @.> Subject: Re: [OpenDroneMap/WebODM] Stitching of RGB and Multispectral Drone Images and Sensor Calibration Features (Issue #1445)

Hey @IbrahimUWAhttps://github.com/IbrahimUWA 👋 could you share a small subset of your images? (That can be reconstructed? Something like 20-60 images).

— Reply to this email directly, view it on GitHubhttps://github.com/OpenDroneMap/WebODM/issues/1445#issuecomment-1850485332, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AVP6HTB32AWBJ5NSHEROBBTYI43VJAVCNFSM6AAAAABAPCDE5WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQNJQGQ4DKMZTGI. You are receiving this because you were mentioned.Message ID: @.***>

Dec 12 '23 01:12 IbrahimUWA

Hello Piero Toffanin, Thank you so much for your kind reply. Please find the attached Zip file containing both RGB and Multi-spectral images. Please let me know if you require more information.

Thank you.

Kind regards Muhammad Ibrahim

Dec 12 '23 01:12 IbrahimUWA

From: Piero Toffanin @.> Sent: 12 December 2023 00:59 To: OpenDroneMap/WebODM @.> Cc: Muhammad Ibrahim @.>; Mention @.> Subject: Re: [OpenDroneMap/WebODM] Stitching of RGB and Multispectral Drone Images and Sensor Calibration Features (Issue #1445)

Hey @IbrahimUWAhttps://github.com/IbrahimUWA 👋 could you share a small subset of your images? (That can be reconstructed? Something like 20-60 images).

— Reply to this email directly, view it on GitHubhttps://github.com/OpenDroneMap/WebODM/issues/1445#issuecomment-1850485332, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AVP6HTB32AWBJ5NSHEROBBTYI43VJAVCNFSM6AAAAABAPCDE5WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQNJQGQ4DKMZTGI. You are receiving this because you were mentioned.Message ID: @.***>

Dec 12 '23 01:12 IbrahimUWA

I can''t access these links for some reason:

<Error>
<Code>BlobNotFound</Code>
<Message>
The specified blob does not exist. RequestId:ec6bab3a-f01e-003a-07ba-2cd0b9000000 Time:2023-12-12T05:18:40.9931218Z
</Message>
</Error>

Can you share somewhere like Google Drive or Dropbox?

Dec 12 '23 05:12 pierotofy

Hello, The link below contains both unstitched images and stitched images. We did stitching separately for RGB and Multispectral separately. https://drive.google.com/drive/folders/1tqn6JUUuM0AdgCST1XvVQIhK9ApwDzMd?usp=sharing Google Drive: Sign-inhttps://drive.google.com/drive/folders/1tqn6JUUuM0AdgCST1XvVQIhK9ApwDzMd?usp=sharing Access Google Drive with a Google account (for personal use) or Google Workspace account (for business use). drive.google.com Let me know if you require further information.

Regards Muhammad Ibrahim

From: Piero Toffanin @.> Sent: 12 December 2023 13:19 To: OpenDroneMap/WebODM @.> Cc: Muhammad Ibrahim @.>; Mention @.> Subject: Re: [OpenDroneMap/WebODM] Stitching of RGB and Multispectral Drone Images and Sensor Calibration Features (Issue #1445)

We can't access these:

BlobNotFound The specified blob does not exist. RequestId:ec6bab3a-f01e-003a-07ba-2cd0b9000000 Time:2023-12-12T05:18:40.9931218Z

Can you share somewhere like Google Drive or Dropbox?

— Reply to this email directly, view it on GitHubhttps://github.com/OpenDroneMap/WebODM/issues/1445#issuecomment-1851318655, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AVP6HTGBT5US3NDO6SCYTW3YI7SNZAVCNFSM6AAAAABAPCDE5WVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQNJRGMYTQNRVGU. You are receiving this because you were mentioned.Message ID: @.***>

Dec 12 '23 08:12 IbrahimUWA

The issue with the Mavic 3M is that the images captured from the RGB sensor are too different than those captured with the multispectral sensor. So ODM drops the RGB band https://github.com/OpenDroneMap/ODM/blob/master/opendm/types.py#L120 when you try to process them all at once.

It might be possible to develop novel methods to process this dataset all at once (perhaps using OpenSfM's camera rigs function), but it's not a trivial fix.

Dec 14 '23 18:12 pierotofy

The issue with the Mavic 3M is that the images captured from the RGB sensor are too different than those captured with the multispectral sensor. So ODM drops the RGB band https://github.com/OpenDroneMap/ODM/blob/master/opendm/types.py#L120 when you try to process them all at once.

It might be possible to develop novel methods to process this dataset all at once (perhaps using OpenSfM's camera rigs function), but it's not a trivial fix.

Hello Piero Toffanin, Thank you so much for your response. Could you tell me how to apply Radiometric Calibration? I have camera calibrations photos and I know the Radiometric Calibration option on WebODM. But I have no idea how to use these photos for this. Please guide me regarding this, it will be highly appreciated.

Thanks

Kind regards Ibrahim

Dec 19 '23 09:12 IbrahimUWA

Let's move this conversation over to the forum at https://community.opendronemap.org? :pray: The forum is the right place to ask questions (we try to keep the GitHub issue tracker for feature requests and bugs only).

Dec 19 '23 15:12 pierotofy