PGRic

I’ve been involved with photogrammetry for 8 years and have tested various close range techniques. Photosynth is a new avenue to explore & I’m interested in how it could be applied in the use, recording and accessing of heritage.


Cameras used in the synths: Canon EOS 1DS MkIII, Konica Minolta Dynax 5D, Canon Powershot A640, Nikon Coolpix 5400. Ricoh Caplio 500SE, Canon 60D


Victoria Cave, Nr Settle
Victoria Cave, Nr Settle
AlanOConnor (Over 1 year ago)
beautiful panarama

PGRic (Over 1 year ago)
I did think about doing the cave, but the victorians made a mess of it. Apparently only a dog could fit down the entrance in 1837.

douglas (Over 1 year ago)
Great panorama, what an awesome view! Now all we need is a photosynth that goes into the cave :-) Mark.

mattu (Over 1 year ago)
Great panorama! Thanks for making this virtual visit possible.

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Zorats Karer, Armenia
Zorats Karer, Armenia
TonyErnst (Over 1 year ago)
Very very cool, thanks for the great description and highlights

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Castlerigg Stone Circle
Castlerigg Stone Circle
douglas (Over 1 year ago)
The scenery is stunning. It's also amazing to think those stones have been there for 5000 years without people coming along and destroying them.

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Braes of Balloch_panorama
Braes of Balloch_panorama
PGRic (Over 1 year ago)
It's been in the records for a while I think. Some naughty person in our group peeled the turf back to show the whole stone.

douglas (Over 1 year ago)
Fascinating - did you move the rock and discover the markings?

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Pendragon Castle
Pendragon Castle
jibajabatrout (Over 1 year ago)
very nioce point cloud for 58 pics :)

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Skyreholme Rock Art
Skyreholme Rock Art
Shail (Over 1 year ago)
very nice point cloud..

TonyErnst (Over 1 year ago)
Check this out in overhead view!

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Long Meg & Her Daughters
Long Meg & Her Daughters
Peter (Over 1 year ago)
This is a neat synth, good use of highlights.

sir_ivar (Over 1 year ago)
Really nice point cloud and awesome photographs. This would be a nice one to make a 3d model of. By the way, my email address on youtube videos is current.

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Rudston Monolith
Rudston Monolith
madeeds (Over 1 year ago)
Great synth, and thank you for the great bit of history. Burrying it as deep as it is tall would require the least amount of lifting, but a lot of digging.

douglas (Over 1 year ago)
Fascinating - thanks for sharing.

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Adel St John the Baptist
Adel St John the Baptist
PGRic (Over 1 year ago)
I’m not entirely sure, could be a mythical creature.

korean (Over 1 year ago)
It looks so nice. the birds carved above the door are an eagle?

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Braes of Balloch_photogrammtery
Braes of Balloch_photogrammtery
PGRic (Over 1 year ago)
Hi xRez, I generally use Topcon's PI3000 'survey station' - but for this model, Topcon ImageMaster was used. Thanks for the info about PTM. Strangely enough I was involved in a trial of it just over a week ago. I was curious to see how Photosynth would handle PTM imagery and created this model: http://photosynth.net/view.aspx?cid=d20c3944-211b-4cde-8323-42b774636ebd - pseudo time-lapse is the best way of describing the results.

xRez_Studio (Over 1 year ago)
I like the mix of a photogrammetric model. What photogrammety tools do you use? You might be interested in Polynomial Texture Mapping (PTM) as well for artifacts like this http://www.hpl.hp.com/research/ptm/ and http://www.c-h-i.org/

EdLee (Over 1 year ago)
Hi PGRic, interesting synth! Here's another stone synth: http://photosynth.net/view.aspx?cid=e9eeba20-5504-410f-a5d2-e5d02d769a69

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Ketley Crags
Ketley Crags
dariusmonsef (Over 1 year ago)
Awesome. Could you geotag this so I can see where it is on the map?

Douglas_Gann (Over 1 year ago)
Amazing work, both in ancient times and in Photosynth. Bravo.

PGRic (Over 1 year ago)
Hello Tony, I've included some further info.

TonyErnst (Over 1 year ago)
Cool, do you know how old the petrogylphs are?

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Cottingley Rock Art
Cottingley Rock Art
PGRic (Over 1 year ago)
sorry Darius, I'm not quite sure what you mean by work.

dariusmonsef (Over 1 year ago)
Hows does the scaling stick work?

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Roughting Linn PT1
Roughting Linn PT1
dariusmonsef (Over 1 year ago)
The combination of your description, the geotag and your highlights really makes this a useful experience. Awesome.

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Rock Art and Basin
Rock Art and Basin
lostinthetriangle (Over 1 year ago)
Wow, so green (detail and the point cloud are great!)

PGRic (Over 1 year ago)
Ed, a Konica Minolta Dynax 5D (called Maxxum in US) with the bundled 18-55mm lens, and a Canon Powershot A640. I shoot using as narrower apertures as possible to shutter speeds of 1/60.

EdLee (Over 1 year ago)
PGRic, thanks for the info. Which cameras? Nice D-SLR's with nice lenses? :)

PGRic (Over 1 year ago)
Ed, a combination of 2 cameras; 2256 x 1486 & 3648 x 2736

EdLee (Over 1 year ago)
Nice, PGRic. What resolution(s) were the photos?

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Furness Abbey
Furness Abbey
PGRic (Over 1 year ago)
Fred, ignore the above comment, although it was a 900 pic synth I'd created 2 smaller versions, so the max upload was about 500 pics on a single synth.

PGRic (Over 1 year ago)
Hello Fred, glad the synth didn't confuse too much. I'll try your method out on the next big synth. Having said that, I don’t think processing time is entirely down to number of images within a synth, this 900+ pic effort took just 3hrs on the same computer and touched a RAM peak 75%: http://photosynth.net/view.aspx?cid=de7e9d58-3289-4d9f-beee-73fd81adf617. Presumably the copious amounts of repetition and relatively small space within the imagery didn’t push the synthers algorithms too much. This has also apparent when I've used photogrammetric software.

Fred_Oxford (Over 1 year ago)
a very interesting point cloud and great synth. I have found that it is best to upload around 100-150 photos (my machine is a little faster and has more RAM) at a time and then to combine then all at the end-that is how I did the Cologne Cathedral - the first group gave 100% synth and the second only 61%, combined it all worked out okay. See: http://photosynth.net/view.aspx?cid=368eeded-d574-4430-867b-94e003a354a7. The point cloud is not too bad on that one given the light conditions on the day I was in Cologne

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Barningham Moor Rock Art 101
Barningham Moor Rock Art 101
PGRic (Over 1 year ago)
Hello K, I've added some info above.

K (Over 1 year ago)
you have created a very detailed synth, can you tell me a little more about what i'm looking at and where it is?

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88280272
88280272
PGRic (Over 1 year ago)
It’s a rare piece of architecture from a 13th century Abbey, the name escapes me.

Jonathan (Over 1 year ago)
What is this exactly?

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The Manor House Ilkley
The Manor House Ilkley
PGRic (Over 1 year ago)
Thanks Bert, i'll look into the geotagging.

Bert (Over 1 year ago)
Nice synth! I really like the detail shots on the signs. If you're interested, you can this with people exploring the area on maps.live.com, by geotagging it.

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Vase_Canon 1DS MkIII
Vase_Canon 1DS MkIII
PGRic (Over 1 year ago)
Hello HenleyB, To my eye the 1DS produced a slightly denser, more accurate point cloud than the others, but the difference between this and the 10mp A640 model looks to be minimal. The Dynax 5D model was poorest of the bunch with elements of distortion all over. Due to the resolution and the presumption that Photosynth would be able to pick out more common points across the imagery, I was expecting the 1DS model to have a significantly denser point cloud. The results were interesting, but I think I need to try a few more similar experiments on different subjects to come to any firm conclusion. Rich

HenleyB (Over 1 year ago)
What were your findings? Did the photo resolution make a difference?

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