[Elphel-support] Exposure priority

[Alexandre Poltorak]

Hi Dimitrios,

Please take a look on http://wiki.elphel.com/index.php?title=Arduino

This method have a big latency for executing the command. You can use http://wiki.elphel.com/index.php?title=Circbuf and http://wiki.elphel.com/index.php?title=Imgsrv to get precisely the image that was acquired during the trigger.

Also in triggered / slave mode the camera will record frames on external trigger to the internal HDD using camogm. You will get MOV files with triggered frames. The problem of this method is that between triggers the camera is completely unresponsive. (so you can not even do a network preview or telnet)

Another idea is to record every single frames using camogm and only mark images on trigger inside EXIF for later processing.

Best regards.
Polto

----- Mail original -----
| De: "Dimitrios" <dz at telemetry.gr>
| À: support-list at support.elphel.com
| Envoyé: Jeudi 5 Janvier 2012 15:24:16
| Objet: Re: [Elphel-support] Exposure priority
| 
| Andrey
| 
| Thank you for the detailed reply. I see, the proper way of doing it
| should be using the PHP API rather than hacking camvc. camvc is still
| the most convenient way for interacting with the camera and lends
| itself
| easily to hacking for the impatient.
| 
| I'll try to determine what would be tolerable for noise in the images
| for my project and play with gain accordingly.
| 
| One of the other requirements for this project is to be able to get
| single snapshots from the camera with a software trigger. I do this
| now
| with imgsrv, however camogm offers a very efficient way of packing
| frames in a .mov container, while, on the other hand, saving a great
| number of single files on the camera's HDD/CF may not be that
| efficient.
| Is there a way of getting single frames saved on demand using camogm?
| That would allow, for example, to automate taking snapshots every x
| distance instead of every 1/fps seconds.
| 
| Regards
| Dimitrios
| 
| 
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