[OpenDroneMap-users] Orthophoto without georeferencing

[Stephen Mather]

Ah, yes I see what you mean. Photoscan, as far as I know, only does this
because you have a 3D model that you can orient and basically declare your
Z axis, which is a clever approach. That means that Photoscan actually
gives you an orthophoto.

Hugin is just stitching and blending, as I understand it. I know Alex
Mandel and Michelle Tobias have a lot of experience with Hugin... . No
point in ODM recreating that functionality, I think (though willing to be
proven wrong) although plenty of reason to integrate that wonderful
multiscalar blending algorithm... .

Cheers,
Best,
Steve



On Wed, Mar 25, 2015 at 10:30 AM, Rimvydas <naktinis at gmail.com> wrote:

> OK, I get what you mean. Maybe "orthophoto" is not the right word in my
> question. What I actually expect in my case is simply a mosaic image
> without any reference to real dimensions or location (something like what
> Hugin or PhotoScan can produce).
>
> On Wed, Mar 25, 2015 at 2:25 PM, Stephen Mather <stephen at smathermather.com
> > wrote:
>
>> Hi Rimvydas,
>>
>> What georeferencing info adds is knowledge of where the Z axis is.
>> Without that knowledge, AFAIK, there's no real way to create an ortho from
>> the mesh.
>>
>> Best,
>> Steve
>> On Mar 25, 2015 9:55 AM, "Rimvydas" <naktinis at gmail.com> wrote:
>>
>>> I've noticed that currently odm_orthophoto is only run after
>>> odm_georeferencing, so if the image set does not have any georeferencing
>>> information, it seems to be impossible to produce a stitched orthophoto
>>> with ODM alone.
>>>
>>> As it is possible to produce a mesh without georeferencing information
>>> (via keypoint matching), it should in theory be possible to produce an
>>> orthophoto mosaic as well. Does anyone know if this would be possible with
>>> the current version of ODM (maybe with slight modifications)?
>>>
>>> Maybe I should write to the dev mailing list instead?
>>>
>>> Best regards,
>>> Rimvydas
>>>
>>> _______________________________________________
>>> OpenDroneMap-users mailing list
>>> OpenDroneMap-users at lists.osgeo.org
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>>>
>>>
>
>
> --
> Rimvydas
>
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