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Multi-camera setup project.

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Re: Multi-camera setup project.
« Reply #230 on: 10 / October / 2014, 08:43:41 »
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The whole point of the "experiment" wasn't to compare results with dslr or s4.We wanted to see if the noise is reducing with brighter scenes (daylight conditions).And as you can see , noise is still in high levels.

Don't want to hold you up mphx.

You & reyalp (and a few others) are doing a fantastic job - a genuine workable point&shoot multicam production system seems to have been born...so this is probably more for my own future record.

Maybe flash is the way to go?

I posted the following here: http://www.dreamingrobots.com/forums/viewtopic.php?f=8&t=2223&p=10855#p10849

"Hi Maurice & folks,

I'd, maybe, like to implement a system as follows:

(i) Arduino Leonardo mouse control to initiate (via GUI or perhaps CLI) a chdkptp "shoot" command - this starts a "multicam.lua" sequence to trigger multiple point&shoot cams via ptp with, seemingly, "reasonably" high synchronisation between cams. You can see the idea in the video here:
https://www.youtube.com/watch?v=1Zt6RgxR8DI

(ii) Subsequently use the same Leonardo to switch the room lights off with an opto-relay

and

(iii) Subsequently use the same Leonardo as a Camera-Axe sensor input to control multi-flash and perhaps trigger multi-dslr remote shutters - a hybrid.

I think i'll be able to scrape around to get (i) and (ii) done, but - can I do no. (iii) ? can you (or anyone else  ;) ) give a pointer ?

Thanks.
"

Maybe multicam.lua isn't quite ready for total "manual" settings? i've read this thread up to page 12 and a few of the more recent ones pages - but most seems complete.

Thanks again.

Edit: some flash duration info http://www.gock.net/2012/01/flash-durations-small-strobes/ via http://www.agisoft.com/forum/index.php?topic=2927.msg15524#msg15524
« Last Edit: 10 / October / 2014, 12:46:55 by andrew.stephens.754365 »

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Offline mphx

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Re: Multi-camera setup project.
« Reply #231 on: 10 / October / 2014, 12:26:37 »
@andrew

First of all i am not doing anything :)

reyalp , waterwingz and the rest on this forum created/contributed everything...i am just taking "served food" and trying to make it work with my project :)

Quote
"Maybe flash is the way to go?"

We already have strong lights hitting the shooting area.."Daylight conditions" proved that they dont improve noise reduction and have in mind that walls in the shooting area are white.If we throw more lights in there...too much brightness will go to object and their color then will blend with the surroundings and will be hard to process afterwards.

We put tripods more close to the center of the shooting area and we will run some tests to see if things are getting any better...

*we had the first camera failing today..."lens error" but we came around that problem..we took out the protective plastic things of the lens..they were causing the problem somehow...all well now :P


About what you are describing for your project.

I really don't get what you are trying to do with that arduino mouse..control pc ? control lights? control dslr flashes?

How clicking something on your desktop , let's say a "shoot" button in chdkptp gui will trigger all the rest?

Do i miss something here ? probably about the arduino mouse mechanisms?

Re: Multi-camera setup project.
« Reply #232 on: 10 / October / 2014, 13:36:35 »
At the very least you have asked a lot of good questions and continued practical investigation in what, I think, is a pretty defining thread, and then reyalp etal...

...did/continues to make something that is generally useful for people working with multiple cameras   :)

I hope my observation that it mostly seems done doesn't put me off my struggle to know how this all really works - i'm finding that a great struggle but also a great general education and can recommend anyone to at least start that struggle, given time.

Syncing by flash is seen as an easy sync method by many in the 3d point cloud capture group, e.g:
http://www.agisoft.com/forum/index.php?topic=2927.msg15495#msg15495

You may wish to search for something like "Step by Step Guide to the Arduino Leonard"

Arduino Leonardo:



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Offline reyalp

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Re: Multi-camera setup project.
« Reply #233 on: 10 / October / 2014, 22:49:43 »
1.With manual zoom , there is no distortion.
Coming back to this, it should be possible to work around use key presses, something like
Code: [Select]
!mc:cmdwait('call repeat click("zoom_in") until get_zoom() >= 10')

It will be somewhat slow on a camera like this with many zoom steps, but if you don't have to zoom through the whole range too often it shouldn't be a big deal. If you do, more complicated code could speed it up.

I used >= because it may be possible that the camera zooms more than one step per click. If this is true, you'll want to make sure it does it consistent ly, or add logic to make sure all the cameras end up at the same zoom.

Also note that (at least on the cameras I tested a long time ago), get_zoom doesn't update while the zoom is moving, so you cannot do something like
Code: [Select]
press('zoom_in')
repeat sleep(10) until get_zoom() == 10
release('zoom_in')

edit:
Of course, it would be great to fix thing so set_zoom doesn't mess up the distortion correction. I'm just offering this as a possible workaround.

edit #2:
On my elph130, I have found that the click method above can overshoot, e.g. if you try for get_zoom >= 50 you might get 54 instead. It isn't the same every time. If you click back and forth you can get it to end up on a specific value.

On that camera, I don't see a difference in distortion correction with set_zoom vs clicking, although there isn't a huge amount of distortion at the value (50) I was testing.

Strangely, there seems to be a slight difference in zoom level even when get_zoom() reports exactly the same value, with set_zoom being consistently wider.  This shows up in the DNG, so it's probably not related to the software correction.
« Last Edit: 12 / October / 2014, 21:00:52 by reyalp »
Don't forget what the H stands for.


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Offline mphx

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Re: Multi-camera setup project.
« Reply #234 on: 15 / October / 2014, 14:33:15 »
@reyalp

I will "play" with the command and get back with feedback when i will have time...to test it :)

--

We got some miniatures today , although the guy who printed them didn't do the best job that could have done.
Although colors and surface is well done , he didn't "brush" the miniatures well , so many spots on them have a white-ish tone...

Here they are (few of them) --> https://www.dropbox.com/s/gov39ijjj9knsgk/20141015_162159.jpg?dl=0

From a medium to long range they seem fine , but in close inspection you can see the flaws...

Lets hope he will do a better job in the next ones.

Re: Multi-camera setup project.
« Reply #235 on: 15 / October / 2014, 17:37:35 »
fan-tas-tic mphx:
reyalp (in particular) and much respect to waterwingz  - will always be the enabler(s)...[thank you guys over a long period]
mphx - you have the the 3D copy, κῦδος !

Re: Multi-camera setup project.
« Reply #236 on: 16 / October / 2014, 17:08:22 »
Great Work !

Thanks everybody for sharing.
Waiting more results pictures:)

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Offline mphx

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Re: Multi-camera setup project.
« Reply #237 on: 17 / October / 2014, 05:37:25 »
@yigit

I can't really publish the rest of the miniatures , since they represent some clients and they won't like their faces on the internet BUT..i can show you a 3d model ..of a girl...she is a pro model , we got her and another guy to pose and get some miniatures for ads and for the site...

For your eyes only people... https://p3d.in/rgRUw


Re: Multi-camera setup project.
« Reply #238 on: 17 / October / 2014, 14:18:42 »
Just noticed this "3D Pandoras(s)?" referred to on the Agisoft site http://www.3dpandoras.com/#section03

Edit: Oh, and a placeholder for my memory:

http://www.agisoft.com/forum/index.php?topic=2654.msg14413#msg14413

"...Also very important, try to go away from auto focus. It is not as important in a constant light situation as yours compared to the flashes but still you can get a few cameras that didn't focus correctly on each session and you will loose important info for the PS process.
You should get someone with nice easy to focus clothes (jeans for example) in the center of the shooting  and manually (or automatically) focus all the cameras. When you are sure all of them are well focused (you should zoom in at least 200% to verify) then you turn them to manual focus and leave them that way."

« Last Edit: 18 / October / 2014, 04:24:39 by andrew.stephens.754365 »

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Offline mphx

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Re: Multi-camera setup project.
« Reply #239 on: 18 / October / 2014, 09:10:47 »
Just noticed this "3D Pandoras(s)?" referred to on the Agisoft site http://www.3dpandoras.com/#section03

Edit: Oh, and a placeholder for my memory:

http://www.agisoft.com/forum/index.php?topic=2654.msg14413#msg14413

"...Also very important, try to go away from auto focus. It is not as important in a constant light situation as yours compared to the flashes but still you can get a few cameras that didn't focus correctly on each session and you will loose important info for the PS process.
You should get someone with nice easy to focus clothes (jeans for example) in the center of the shooting  and manually (or automatically) focus all the cameras. When you are sure all of them are well focused (you should zoom in at least 200% to verify) then you turn them to manual focus and leave them that way."


We have all cameras in auto focus.If you setup the center of their view in the position you want..they will focus there....in the center.No need to trouble yourself with focus.We never had blurred photos...using auto focus i mean..they all focus in the center of their view..so its all about correctly positioning the cameras...

 

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