[OpenDroneMap-users] Tips and tricks for model re-runs

[Stephen Mather]

Hi Ivan,

Boruszyn now has GCPs associated with it:

https://github.com/merkato/odm_boruszyn_kap

PUWG1992
340577 547925 70 691 3498 img_4851.jpg
340610 548131 71 1248 2921 img_4854.jpg
340649 548176 70 1078 2312 img_4912.jpg

And all these GCPs are valid when processed. Boruszyn does not make ideal
orthos, due to the geometry difficulties of a KAP flight, but it's such an
amazing dataset.

Somewhere I have a couple more GCPs for Langley, but I can't find them... .
I know Aaron Racicot, the originator of that dataset, is working both on
GCPs and EXIF camera positions for that dataset. He's nearly done with
that, so stay tuned.

Also, there's a new graceful-exit branch (thanks to Spotscale) to test:

https://github.com/OpenDroneMap/OpenDroneMap/tree/graceful-exit-gcp

Please give this a test on datasets that have no EXIF and no GCPs.

Thanks,
Best,
Steve




On Wed, Mar 4, 2015 at 8:03 AM, Ivan Lizarazo <ivan.lizarazo at gmail.com>
wrote:

> Nice work, Steve. It's really helpful.
>
> I ran ODM with the Langley dataset using this gcp_list.txt (taken from the
> wiki):
>
> *WGS84 UTM 10N*
> *544256.7 5320919.9 5 3044 2622 img_0525.jpg*
> *544157.7 5320899.2 5 4193 1552 img_0585.jpg*
> *544033.4 5320876.0 5 1606 2763 img_0690.jpg*
>
> After a while, ODM quit the georeferencing job.  This is the last part of
> the odm_georeferencing_log.txt:
>
> *Reading following GCPs from file:*
> *x_: 544257 y_: 5.32092e+06 z_: 5 pixelX_: 2622 pixelY_: 3044 image:
> img_0525.jpg*
> *x_: 544158 y_: 5.3209e+06 z_: 5 pixelX_: 1552 pixelY_: 4193 image:
> img_0585.jpg*
> *x_: 544033 y_: 5.32088e+06 z_: 5 pixelX_: 2763 pixelY_: 1606 image:
> img_0690.jpg*
>
> *The calculated easting offset for the georeferenced system: 544149*
> *The calculated northing offset for the georeferenced system: 5.3209e+06*
>
> *Recalculated GCPs with offset:*
> *x_: 107.7 y_: 21.9 z_: 5*
> *x_: 8.7 y_: 1.2 z_: 5*
> *x_: -115.6 y_: -22 z_: 5*
>
> *Reading mesh file
> /home/ivan/odm_data/langley/reconstruction-with-image-size-2400-results/odm_texturing/odm_textured_model.obj*
>
> *Successfully loaded
> /home/ivan/odm_data/langley/reconstruction-with-image-size-2400-results/odm_texturing/odm_textured_model.obj.*
> *Position in model for gcp 3: x=13.1883 y=-2.29253 z=-15.2447*
> *Error in Georef:*
> *Less than 3 GCPs have correspondences in the generated model.*
>
> I understand that more than 3 GCP are needed to succeed.  Do you  have
> more GCP available for the  Landley dataset?
>
> Could anybody provide a GCP list for any of the ODM sample datasets?
>
> Best regards,
>
> Ivan
>
> On Sun, Mar 1, 2015 at 8:32 PM, Stephen Mather <stephen at smathermather.com>
> wrote:
>
>> Hi All,
>>
>> I was playing today with the Langley dataset, working on the
>> georeferencing / orthophoto tests, and hadn't loaded enough (useable)
>> points in my gcp file for the georeferencing / orthophoto generation.
>>
>> So, I added some more ground control points to odm_georeferencing_log.txt
>> and wanted to rerun, but not everything. Since the latest step we can start
>> from (at this time) is pmvs, here was the command I ran so that I wouldn't
>> have to rerun all the matching and bundler:
>>
>> run.pl --resize-to 3000 --start-with pmvs
>>
>> It completed in 30 minutes instead of 8 hours, which was refreshingly
>> short, and reran PMVS (point cloud model creation), meshing, mesh
>> texturing, and orthophoto generation.
>>
>> Hope this helps,
>> Best,
>> Steve
>>
>> _______________________________________________
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>>
>>
>
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