USB Streaming and Stereo

aboeing

2

« on: 26 / May / 2010, 03:14:34 »

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I'd like to build a cheap low frames-per-second stereo camera system.
I've seen that the CHDK can be used with an external trigger to take stereo pictures - but I'd like to process them on my PC as well.

Does CHDK allow USB-streaming or download of the images via USB, as well as having an external trigger (presumably through some kind of digital IO board)?

Thanks.

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Microfunguy

4037

Re: USB Streaming and Stereo

« Reply #1 on: 26 / May / 2010, 04:51:14 »

Well, you would not achieve even one frame per second.
With SDM, the camera has to switch to playback mode before uploading images via USB.

As far as I know, the experimental CHDK PTP build can upload in Record mode and you can also send a 'shoot' command.

In theory SDM can be used but the CHDK PTP seems a more viable solution.

Maybe those who are using that build can comment.

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aboeing

2

Re: USB Streaming and Stereo

« Reply #2 on: 26 / May / 2010, 08:14:11 »

Thanks for your input.

Can anyone recommend a camera model that would allow image streaming via PTP and support a synchronised external trigger?

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Microfunguy

4037

Re: USB Streaming and Stereo

« Reply #3 on: 26 / May / 2010, 12:16:06 »

I suggest that you start reading here and work backwards through the thread :-

http://chdk.setepontos.com/index.php/topic,4338.180.html

Also check recent posts by EWAVR, he notes that a particular camera is slow at communicating via PTP.

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