[Elphel-support] raw file from elphel

[Venkat Subbiah]

Andrey,

Thanks for you reply.

I would like to get the pixels before any color processing.  Other than
compression are the raw pixels processed before putting the data into the
JP4 file? If so what is the kind of processing is done?

Thanks,
VEnkat




On Sat, Oct 13, 2012 at 9:59 PM, support-list <
support-list at support.elphel.com> wrote:

> ---- On Sat, 13 Oct 2012 20:15:38 -0700 Venkat Subbiah<
> venkat at magnasinc.com> wrote ----
>  > 1) On that webpage the link to the PHP script is not working.
>
> Venkat, thank you - I fixed it. SOmehow "http://" was repeated twice
>  > 2) What is the format of the raw image?
>
> Just sequence of bytes (or 16-bit words) corresponding to
> (width+4)*(height+4), where width and height are dimensions you'll get in
> normal mode
>  > 3) On the webpage there is a warning about continuos acquistion? How
> can I set the camera to take one picture and stop taking any more pictures
> till I ask it to do so again.
>
> There are several ways how to do it. I would recommend using the triggered
> mode (http://wiki.elphel.com/index.php?title=Trigger ) . In that mode
> sensor can be triggered either from the external signal or from the camera
> FPGA. In that case you may either set trigger period (in sensor 96MHz clock
> periods ) or trigger by a command. When camera is in "TRIG=4 " mode and
> TRIG_CONDITION=0 you may trigger it with
> http://192.168.0.9:8081/trig/pointers command (assuming default
> IP=192.168.0.9)
>
> And how exactly are you going to use that raw mode? To my understnding It
> is only useful for camera FPGA and firmware (or host computer decoder)
> troubleshooting, the JP4 with Q=100% provide high frame rate and data loss
> is under the sensor noise floor, with proper decoding (as in ImageJ Java
> plugin) the result 32-bit Tiff matches the sensor pixel values in linear
> mode.
>


> Andrey
>
>
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