topic Panoramic Verified views - advice in 3ds Max Forum

Panoramic Verified views - advice

Tommybouy — Wed, 03 Jan 2024 17:24:44 GMT

Hi Folks,

this is something I have avoided for a while and now I need to sort,

Can someone here give a very brief outline on creating verified photomontages - Moreso the latter stages
I understand about using the 50mm prime lens, tripod with Pano head, portrait mode, rotating every 20 degrees, control points in photo and getting them recorded with gnss equipment. (Camera location will also be recorded as a 3D point. )

The issues I have is
A)when making the pano (i.e. what type of stitching, cylindrical, and should I make this planar afterwards)
B) in MAX, I set the pano to viewport background and set render output to match, turning on Safe frame, BUT is the 3D camera still at 50mm lens just reduce the zoom factor and target location until the survey points match the control points in the (panoramic) viewport background??
I have look at numerous site on this but they don't detail B) above and soemwhat confusing on A)

If someone here is seasoned on this stuff I am happy to discuss payment

Thanks

Tom

Re: Panoramic Verified views - advice

darawork — Thu, 04 Jan 2024 09:30:35 GMT

Hi,

While not exactly having the answer;
Here is all the information I have saved when researching Verified Views:
https://w-si.link/vNxrUBj6WZIzinMOU

That said, I have never seen a panoramic (360?) verified view... I didn't even know they existed.

Regards,

Re: Panoramic Verified views - advice

Tommybouy — Fri, 05 Jan 2024 12:47:25 GMT

Thanks for that ,
some good info there but unfortunately nothing about the specifics of the virtual camara for Panos 😞

cheers,

Re: Panoramic Verified views - advice

darawork — Fri, 05 Jan 2024 16:19:34 GMT

Hi,

I was just having a look again for a link that specifically mentioned "Panoramic" and "Verified View" and this hit popped up: https://www.ianhumes.co.uk/pages/methodology.html

He has breifly mentioned Panoramic in his methodology statement, and also quite kindly listed his email address and phone number if anyone needs more info. Perhaps you could send him off a quick email?

Also, from https://www.altonestateregen.co.uk/assets/regeneration/documents/may-2020-submission/esa-verified-views.pdf (Page 3 of the PDF States:)

"Overview The Arcminute system is designed to create geometrically accurate
photography and verifiable data for all its associated parameters and is fully
compliant with all guidelines covering images required to be aligned with
survey data for use in planning applications.
Equipment Images are captured on a 36mm x 24mm 36 megapixel digital
sensor in combination with the following lenses: 17mm, 24mm, 35mm, 52mm
and 80mm with shift capability (specially selected for best in class resolution
and customised to conform to the high precision focal length and optical
axis settings required in the process). Re camera mounts, custom made
designs for both single frame and panoramic capture are used to obtain high
precision camera positioning and orientation tolerances.

Choice of lens We prefer to replicate (as far as possible) what may have
already been provided in terms of preliminary view studies as typically
these would have been generated using pre-considered factors as to what
each view would need to illustrate e.g. context, key visual receptors etc. In
the absence of a definitive steer, we will generally use a 74o
HFOV lens for
medium to close views in an urban environment and a 40o
HFOV lens for
long distance views. However, the actual size and nature of a scheme (single
building or large multibuilding development) and its location will also be
considered before lens selection. The Landscape Institute’s latest guidelines
have been relaxed with regard to lens choice and they are no longer insistent
that a ‘standard’ lens be used wherever possible.

Photography The camera is set up at eye level (1.55-1.75m) and orientated
to within 0.02 deg of pitch and roll to the horizon. The point on the camera
that coincides with the origin of perspective is positioned in relation to a
survey marker to within 2mm in XYZ. The scene is then captured in a RAW
format using standard high quality architectural photographic practice.
For panoramic images the camera is setup in portrait orientation and rotated
around the camera coordinate capturing sequential frames with a 50%
overlap. Each frame has the same orientation tolerance as a single frame
capture. For every view, a photographic record is made of the tripod location,
the survey mark and the height reading of the camera above it".

Hopefully some more clues there.

Regards,

Re: Panoramic Verified views - advice

Tommybouy — Tue, 09 Jan 2024 15:25:46 GMT

thanks again, I actually reached out to another and got a reply saying he'll come back to me on it 🤞

so all of the above i understand , the specific issue i have is matching the virtual camera to the pano (when pano is a viewport background, i have got around this before by having 7 different cameras all rotated 20 deg from eachother to match the 7 photos (each shot on a 50mm and each had the correct control points all matching) and then stitch the 7 rendered images to make a pano, somethimes doing it this way if can cause issues with the rendered elements (e.g intricate building development, not exactly stitching properly together), IMHO it would be so much better to render once at the width of the actual pano and then edit in the rendered element into the pano.
i'll keep scouring and might try ian,

Thanks