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Multi-camera setup project.

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Re: Multi-camera setup project.
« Reply #240 on: 18 / October / 2014, 17:38:02 »
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Thanks for comment mphx.

As I said, my comment is more a placeholder for when I get around to my own build in which i'd like to capture from darkroom blackroom using flash. I don't wish to disrupt  the "flow" of your thread but I still have too much to learn before starting my own.

I'd only dabbled in all of this this for a short time when the machine I used for chdkptp died - that is still the case - so most of what I say is not based in testing and a lot may be mere speculation. Until I realised the potential of photogrammetry for 3D  I had practically no interest in 2D photography (& still haven't).

Anyway, what i'm currently thinking is for canon point & shoot cams that natively support MANUAL setting capacity for focus / zoom / aperture:

(i) First thing each morning, in studio ambient light conditions, run a multicam.lua type routine [function] that, uniquely for each camera, sets focus / zoom / ambient aperture / ambient shutter period based on a PC  located "Ambient Light Condition Table(s)"[see later for that Table(s) description] - that script finshes with "exit-ALT" (does that even exist?) so that manual, per camera, settings (focus/zoom) can be "tweaked" (i.e. physically on each camera).

(ii) Now, with the "Tailors dummy" in the centre of the rig  (or a much bigger or smaller one, depending on that day's "chosen" clientele list), each camera is focused (tweaked) in the manner described as at post #238:
http://chdk.setepontos.com/index.php?topic=11667.msg117574#msg117574

(iii) Now, another multicam.lua type routine is run. It's purpose is to GET the most recent (tweaked) focus/zoom values from each camera and to overwrite the values (for each camera) stored, on the PC, in the "Ambient Light Condition Table(s)" file(s) )

(iv) Now, another multicam.lua type routine is run. It's purpose is to OVERWRITE these most recent (tweaked) focus/zoom values (from each camera) into a separate "Flash Light Condition Table(s)" PC based file(s) [the aperture for flash condition & shutter speed for flash condition values having been pre-determined are not overwritten].

(v) Now,
(a)
another multicam.lua type routine is run. It's purpose is to SET the ambient focus/ ambient zoom/ [flash] aperture/ [flash] shutter speed values (for each camera) from the Table(s) stored on the PC at point (iv). 
(b)
another multicam.lua type routine [function] is run. It's purpose is to:
  • lock all settings (for each camera as supplied at (v)(a)
  • apply usbptpsynch & shoot as perexisting in a similar fashion to the current "multicam.lua" but in flash light conditions

Make sense? don't ask me to repeat, i've had my first 4 glasses (Saturday night after all)
Well, do please, somebody...anybody

PS:
This post was based on this post (no replies):
http://www.agisoft.com/forum/index.php?topic=2953.0

Edit:
Cross ref - this is what I must have been thinking about all along http://chdk.setepontos.com/index.php?topic=8769.msg106040#msg106040
 
« Last Edit: 25 / October / 2014, 16:48:17 by andrew.stephens.754365 »

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Offline mphx

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Re: Multi-camera setup project.
« Reply #241 on: 18 / October / 2014, 18:35:27 »
@andrew

ok i am not ashamed to admit it. I lost you at half way :)

You want to setup focus/zoom/aperture.

Easier way is by testing values.When you find the "correct" ones for every occasion then you create some buttons in the GUI.
Right before you press shoot , you press the button you want , values are issued and then you shoot.
You make a "reset button" that resets the values of focus/zoom/aperture and you are good to go.
Also you doesn't need to manually setup focus.Leave it to autofocus...it will adjust to any new zoom level you issue.
Easy things , nothing fancy...

If i got what you want to do..if i am not...pretend you didn't see my post :)

Re: Multi-camera setup project.
« Reply #242 on: 18 / October / 2014, 18:46:29 »
that script finshes with "exit-ALT" (does that even exist?)
link> exit_alt()
Ported :   A1200    SD940   G10    Powershot N    G16

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Offline mphx

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Re: Multi-camera setup project.
« Reply #243 on: 24 / October / 2014, 13:17:08 »
@reyalp

I am messing with a new laptop these days and installed a debian-based disto on it.
So i thought to install chdkptp on it.I have two questions (not important ones :P )

1.Any good and reliable svn update/sync program (with gui if possible) for syncing lua files ?
2.I created a launcher for the program ...is there any ico to put to it ? :)

PS : I didn't like at all that i had to "install" iup and cd libs "outside" the package manager mechanism...anyways :)

I will put it on test tomorrow..to see if the linux flavor is better or the same :)


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Online reyalp

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Re: Multi-camera setup project.
« Reply #244 on: 24 / October / 2014, 21:23:55 »
1.Any good and reliable svn update/sync program (with gui if possible) for syncing lua files ?
I tend to use command line svn, probably just called 'subversion' or maybe something like 'subversion-client' in your package manager. The last time a looked (not recently) there wasn't anything remotely comparable to tortoise.
Quote
2.I created a launcher for the program ...is there any ico to put to it ? :)
Not in any normal format. The one that appears on the program at run-time is in gui_icon.lua. msl made that, I'm not sure what the source file is. I'm sure you can find the chdk logo on the wiki.
Don't forget what the H stands for.

Re: Multi-camera setup project.
« Reply #245 on: 24 / October / 2014, 21:35:10 »
The last time a looked (not recently) there wasn't anything remotely comparable to tortoise.

http://en.wikipedia.org/wiki/RabbitVCS  ( from http://en.wikipedia.org/wiki/Comparison_of_Subversion_clients )

Just playing with it now on Fedora.  I'll likely stick to the command line but it seems to intergrate with the default Fedora file manager pretty much like TortoiseSVN on Windows.
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Multi-camera setup project.
« Reply #246 on: 25 / October / 2014, 15:47:05 »
Hi All

I am using 24 X Canon A2500 P&S for 360 deg Multi camera array (you are welcome to read my thread  http://chdk.setepontos.com/index.php?topic=11583.msg113396#msg113396)

I also found the issue of lens distortion caused by set_zoom (object get bend in the image / fish eye)
Attached here example of set_zoom distortion (i am not sure the specific value but i assume it is around zoom=20)
higher the zoom , higher distortion (fish eye)

I am running  a2500-100a-1.3.0-3492 version (I can see that there are newer ver with zoom fix)

According to latest message, new version solved only partially the issue while
Code: [Select]
!mc:cmdwait('call repeat click("zoom_in") until get_zoom() >= 10') (http://chdk.setepontos.com/index.php?topic=11667.msg117482#msg117482 ) should solve it.

mphx / reyalp, Can you confirm it solved the issue ? (second, Will it work on my FW version 1.3.0-3492)?

Re: Multi-camera setup project.
« Reply #247 on: 25 / October / 2014, 17:58:28 »
Attached here example of set_zoom distortion (i am not sure the specific value but i assume it is around zoom=20)
higher the zoom , higher distortion (fish eye)
I see the problem now!  Somebody bent the poles & bars that hold your cameras in place.  :lol
Ported :   A1200    SD940   G10    Powershot N    G16


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Offline mphx

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Re: Multi-camera setup project.
« Reply #248 on: 25 / October / 2014, 18:00:29 »
@novsela

unfortunately i didn't have the time to test that command.Since manually zooming doesn't create distortion there is a good chance that command would work well...

I will try to test it in the next days...

If anyone comes to greece , visit us :) http://www.its-you.gr .Friendly prices :)

Re: Multi-camera setup project.
« Reply #249 on: 25 / October / 2014, 18:10:36 »
If anyone comes to greece , visit us :) http://www.its-you.gr .Friendly prices :)
Very cool!
Ported :   A1200    SD940   G10    Powershot N    G16

 

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