Author Topic: Ball's Pyramid  (Read 4484 times)

Offline bigben

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Ball's Pyramid
« on: October 09, 2014, 01:24:06 PM »
Working on a project with Museum Victoria, helping them with a 3d reconstruction of a small island for a museum display. The model worked better than expected so I thought I'd try a quick visualisation in TG. Yes it can use some foam around the island, but I'm pretty happy with the result. The island is an OBJ, 6.9M faces, 4 x 8192px textures. Produced from 54 photos (every 4th shot from what they supplied me) shot from a boat. Agisoft Photoscan.

I also produced a geotiff but there are too many overhangs on this island to get a decent result from that.
« Last Edit: October 09, 2014, 01:27:05 PM by bigben »

Online Kadri

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Re: Ball's Pyramid
« Reply #1 on: October 09, 2014, 01:47:30 PM »

Looks good and interesting island Ben.
It looks nearly like a blade stabbed from below.

Offline Dune

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Re: Ball's Pyramid
« Reply #2 on: October 09, 2014, 03:50:12 PM »
Interesting way to make an island, but the result is very nice!

Offline archonforest

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Re: Ball's Pyramid
« Reply #3 on: October 09, 2014, 06:20:04 PM »
I like it too ;)

Offline bigben

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Re: Ball's Pyramid
« Reply #4 on: October 09, 2014, 08:10:53 PM »
The finished model will be ~1.8m long.  CNC milling of a base model and then hand scultping of the fine details. As for the island...
http://therafimrpg.wikidot.com/the-isle-of-leng
or perhaps http://en.wikipedia.org/wiki/Ball%27s_Pyramid  ;)

Minecraft: http://www.planetminecraft.com/project/balls-pyramid---rendering-some-tests/
Old school climbing: http://www.uq.edu.au/nuq/jack/Bryden.html
and a slightly different way to see the island: https://www.facebook.com/jeb.corliss/photos/pb.171260932916868.-2207520000.1412885222./761525633890392/?type=3&theater

Offline Oshyan

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Re: Ball's Pyramid
« Reply #5 on: October 09, 2014, 11:22:04 PM »
Hey, that's the place with those crazy, giant (endangered) stick insects. Nice!

- Oshyan

Offline bigben

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Re: Ball's Pyramid
« Reply #6 on: October 10, 2014, 06:20:52 AM »
Put the image on our work iPad and showed it to another techie.  Knowing I was into photogrammetry he mentioned that it would be a cool island to make a model of.  ;D  ... another mind suitably blown.

Offline bigben

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Re: Ball's Pyramid
« Reply #7 on: October 11, 2014, 09:35:52 PM »
A couple of quick additions of some extra data... SRTM and bathymetry (not that you can see the latter). Sadly the "mountains" on Lord Howe island are rather rounded from the lack of resolution and I had to do a bit of tweaking of the bathymetry data to restrict it to a max. of-5m. Found a low res aerial image of the island and you can just make out the airport on the right. Should at least be able to make some masks from it. Needs more haze (they're ~20km apart) and some localised clouds to give them their typical cloudy caps.

Online Kadri

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Re: Ball's Pyramid
« Reply #8 on: October 11, 2014, 10:18:58 PM »

The island looks great on the last one.

Offline bigben

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Re: Ball's Pyramid
« Reply #9 on: October 11, 2014, 11:49:16 PM »
I'm kinda hoping I can convince them to do some aerial mapping of Lord Howe Island. Then it could get very interesting.

Offline RogueNZ

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Re: Ball's Pyramid
« Reply #10 on: October 11, 2014, 11:51:23 PM »
That's an amazing land form  8)

Offline Dune

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Re: Ball's Pyramid
« Reply #11 on: October 12, 2014, 07:07:10 AM »
That turned out extremely photographic, Ben. Some foam will make it quite perfect. What's that dark patch in the centre down; a shadow from an overhang or dark rock slab?

Offline bigben

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Re: Ball's Pyramid
« Reply #12 on: October 12, 2014, 10:49:49 AM »
There's a couple of dark sections that may be the result of shadows in the original photos and a combination of overhangs and dark rock. I adjusted the photos that were shot into the sun quite a lot to lighten the shadow detail for the photogrammetry, as their camera was on auto. The sun would have been behind and off to the left in the bottom image. Weather restricted shooting to one time of the day, although they've taken some more since.  Shooting on a cloudy day would be better although in this case a cloudy day usually means an orographic cloud sitting on top of the island. 

I'm hoping these images will demonstrate the potential of reusing the data they're collecting for other virtual displays as well as the large model that's being printed/sculpted. Next versions will have to have some foam. I'd also like to remove the water altogether and show the underwater terrain, but getting the transition from "high" res dem above the water to low res dem below is difficult in this case and may require some manual "sculpting" or masked displacements.

Offline archonforest

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Re: Ball's Pyramid
« Reply #13 on: October 13, 2014, 12:34:22 PM »
Last version is great! :D

Offline SergVM

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Re: Ball's Pyramid
« Reply #14 on: September 05, 2018, 02:16:50 PM »
Working on a project with Museum Victoria, helping them with a 3d reconstruction of a small island for a museum display. The model worked better than expected so I thought I'd try a quick visualisation in TG. Yes it can use some foam around the island, but I'm pretty happy with the result. The island is an OBJ, 6.9M faces, 4 x 8192px textures. Produced from 54 photos (every 4th shot from what they supplied me) shot from a boat. Agisoft Photoscan.

I also produced a geotiff but there are too many overhangs on this island to get a decent result from that.
Hello, I am working on same project for my own. Could you send me these fotos ? I saw much photos and videos but didnt see good enough for Agisoft

 

anything