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two way communication with the camera

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Offline jamesheath

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two way communication with the camera
« on: 09 / November / 2009, 09:34:35 »
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Hi,

I'm a bit of a newbie here, so forgive me if I'm asking a question that's already been answered. I've had CHDK on my camera for a while now & it's really VERY good.

I've just come up with a new project, and for this I want 2 way comms from an Arduino (small remote programmable controller) to my IXUS 70. Using CHDK's USB remote, I will be able to make the Arduino take a pic, but I want to have the IXUS tell the Arduino that the picture has finished taking. Is this possible via the USB? Does the current change? I'm guessing this isn't possible.
If it isn't possible via the USB, presumably I could program the LCD to flash & detect that light change using a LDR or similar.
Failing both of these, I will just program in a wait of the longest likely focus & expose time.

For those interested, my idea is to use an Arduino, some servos a USB likn & some servos to take large scale panoramas automatically, then use microsoft ICE to auto stich them together (http://research.microsoft.com/en-us/downloads/730cd6bb-6450-4e66-8101-a94e71cb0779/default.aspx)

Thanks

James
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Offline Microfunguy

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Re: two way communication with the camera
« Reply #1 on: 09 / November / 2009, 10:16:51 »
Hi James.

Yes, this is already possible and a number of people are working on similar projects.

Check this page http://stereo.jpn.org/eng/sdm/serial.htm.

You can use the blue print led or the brighter autofocus led to communicate with the camera,

See this, for one I made earlier  http://chdk.setepontos.com/index.php/topic,3888.0.html


David
« Last Edit: 09 / November / 2009, 10:19:24 by Microfunguy »
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Offline jamesheath

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Re: two way communication with the camera
« Reply #2 on: 09 / November / 2009, 10:54:12 »
Woah!!

Seriously further advanced than I was thinking of!! But absolutely does what I want - thanks.

My plan is to build a light enough device to be portable, and eventually to be able to fly it from a kite.

Has anyone that you know of documented this using Arduino?

Thanks for the info,

James
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Offline Microfunguy

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Re: two way communication with the camera
« Reply #3 on: 09 / November / 2009, 12:57:13 »
Quote from: jamesheath on 09 / November / 2009, 10:54:12
Has anyone that you know of documented this using Arduino?

No, but this was developed for a similar PICAXE-based rig being designed by this user :-

http://www.instructables.com/id/Camera-Panorama-robot-head-panograph/

He suddenly disappeared, I have not heard from him since the beginning of August.

(for KAP, I am currently testing a new command that determines when motion is at a minimum and then takes the photo).



David
« Last Edit: 10 / November / 2009, 04:33:21 by Microfunguy »
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Offline tgran

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Re: two way communication with the camera
« Reply #4 on: 09 / November / 2009, 23:44:29 »
Another KAPer following along silently :)  

Anti-MX3 motion detect?  

Thanks to David I've had quite a bit of fun with an arduino based controller using a 3-axis accelerometer to determine motion minima.  I still find that the main problem with crisp pictures is 1) exposure time and 2) camera motion.  With the accelerometer trigger I can generally manage to get consistent sharp pictures at 1/30th of a second -- but any longer the camera motion wins out.  I think I can make the rig more stable with more work.  Then I might need a more sensitive accelerometer.  It's a never ending battle till we get 10 second exposures :) 
« Last Edit: 10 / November / 2009, 00:01:39 by tgran »
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Offline Microfunguy

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Re: two way communication with the camera
« Reply #5 on: 10 / November / 2009, 04:35:19 »
Quote from: tgran on 09 / November / 2009, 23:44:29
Anti-MX3 motion detect?  


Yes.

I will try to upload a test version today and you can see if it can possibly work.


David
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Offline jamesheath

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Re: two way communication with the camera
« Reply #6 on: 10 / November / 2009, 05:05:23 »
Can I just check I've understood the idea behind 'Anti-MX3' - is this using the reverse of the motion detection shutter control, to have CHDK autoamtically take a picture only once there is no (or low) movement. That is clever.
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Offline Microfunguy

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Re: two way communication with the camera
« Reply #7 on: 10 / November / 2009, 05:12:03 »
Quote from: jamesheath on 10 / November / 2009, 05:05:23
is this using the reverse of the motion detection shutter control, to have CHDK autoamtically take a picture only once there is no (or low) movement.

Yes.

Quote
That is clever.

It is if it works  :)
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Offline Microfunguy

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Re: two way communication with the camera
« Reply #8 on: 12 / November / 2009, 18:28:25 »
Quote from: tgran on 09 / November / 2009, 23:44:29
Another KAPer following along silently :)  
Anti-MX3 motion detect?  


Yes, see reply here.

David
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Offline gaga.signor

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Re: two way communication with the camera
« Reply #9 on: 23 / November / 2009, 10:55:55 »
Hi,
I'm just working on the same Idea: Arduino+Servos+Camera+Software (Hugin im my case) = PANORAMA.
Here short Film: YouTube - Broadcast Yourself.
But it has no two way communication, which makes it difficult to shoot fotos fast and reliably.
Ciao,
Christian
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