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Author Topic: Offset in exported orthomosaic  (Read 20120 times)

Paulo

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Re: Offset in exported orthomosaic
« Reply #15 on: May 14, 2025, 03:19:35 AM »
Here are a few images and their associated data, also a marker KML file which I haven't had a chance to check so it could be sketchy. It's been a busy day, if these don't measure up I can do better when things calm down. https://drive.google.com/drive/folders/1slRrd7StOl2M6kJyLnKUaMX7Vag0akrp?usp=sharing

You must give me permission to download the image set
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Paul Pelletier,
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Duncan Bourne

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Re: Offset in exported orthomosaic
« Reply #16 on: May 15, 2025, 02:52:50 AM »
Paulo - oops, sorry. You should be able to see those now.

olihar - What is time syncing and how would I apply it to scanned images that are 75 years old?

Paulo

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Re: Offset in exported orthomosaic
« Reply #17 on: May 15, 2025, 03:18:32 AM »
Duncan, it is still asking for permission to access your files  thru gmail
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Paul Pelletier,
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olihar

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Re: Offset in exported orthomosaic
« Reply #18 on: May 16, 2025, 02:00:05 PM »
I am getting the same no access even after I apply for it.

Duncan Bourne

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Re: Offset in exported orthomosaic
« Reply #19 on: May 22, 2025, 04:46:29 AM »
Hi Paulo and Olihar, are you getting the option to download the file? I've tried sending the link to a couple of people here and it seems to work, they can't open it to view but they can download it.  Here's a new copy of the link in case it's changed: https://drive.google.com/file/d/1w-LdWrES_L6bLzL83Xc5lJKFtACYcvPC/view?usp=drive_link

Paulo

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Re: Offset in exported orthomosaic
« Reply #20 on: May 22, 2025, 06:36:38 PM »
Hi Mate,

I was able to align your sample images, disabling the camera reference (it seems you included positions from QAP5309 and not 5308...) and setting pitch and roll to 0....

There should not be any offset in ortho as seen in comparing same  point in exported ortho.jpg and ortho in MS....

The Australian outback has such vivid colors!

Nota bene:
2 flight lines from samples have no overlap...
« Last Edit: May 23, 2025, 03:51:22 AM by Paulo »
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Paul Pelletier,
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Duncan Bourne

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Re: Offset in exported orthomosaic
« Reply #21 on: May 29, 2025, 02:42:44 AM »
Thanks very much for your help Paulo. It's good to know it's possible to get a good result, now I just need to figure out how to do it. There seems to be an endless series of settings and adjustments, every time I think I've got it there's a new panel I've hitherto neglected.

olihar

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Re: Offset in exported orthomosaic
« Reply #22 on: June 02, 2025, 07:50:39 PM »
Data works great, just this small sample dataset produced well over a billion points.

Stunning landscapes.

Duncan Bourne

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Re: Offset in exported orthomosaic
« Reply #23 on: June 03, 2025, 03:14:19 AM »
Hi Olihar, thanks for looking at my images, the landscapes are indeed breathtaking. Are you able to get any sense of the spatial accuracy of the mosaic? I have replaced the .csv with the correct metadata. I can get great looking results but they often have an offset of 5-10m, not completely consistent across the mosaic. When I'm working in Metashape it seems to be able to locate markers with 1m accuracy but I'm not seeing this in the exported mosaic.