Re: [libdc1394-devel] format 7 experiences

[David M. <dcm@MIT.EDU>]

Tim,

I found the manual for your camera:

http://net-gmbh.com/e/documents/NET_FOculus_T_user_manual_v1.0_001.pdf

In looking at the specifications for the FO323TC, I notice that it says
it supports "Raw RGB".  That almost certainly means that the camera only
gives you the raw Bayer pattern and not a full RGB image.  In other
words, it does not support a color coding of RGB16.  You will get a
"grayscale" image which then has to be color interpolated.  Luckily,
libdc1394 does provide these functions.  Look in conversions.h.

This makes sense, because RGB16 at 30fps 1024x768 would far exceed
400Mbps.

-David

On Tue, 2007-02-27 at 16:12 -0500, Tim Rodgers wrote:
> Hi, all,
> 
> I am working with a camera that supposedly supports 12-bit raw RGB  
> video.  I'm successfully communicating with the camera, the  
> dc1394frame_t structure indicates that I am using video mode  
> format7_mode0 and my color coding is RGB16.  But I can't make heads  
> nor tails of the pixel data payload I'm getting.
> 
>  From people's experiences, do cameras generally return RGB data in  
> packed 16-bit form, meaning 16-bit R, followed by 16-bit G followed  
> by 16-bit B?
> 
> Also, judging by the dc1394frame_t total bytes, bytes per packet and  
> packets per frame, I'm not getting a complete frame.  Even though the  
> camera supports 12-bit RGB at 1024 x 768, I've set up a 640 x 480 ROI.
> 
> 	size <col, row>: 640, 480
> 	color coding: 326
> 	bit depth: 16
> 	stride: 3840
> 	video mode: 88
> 	total bytes: 616640
> 	image bytes: 1843200
> 	padding bytes: -1226560
> 	bytes_per_packet: 3280
> 	packets_per_frame: 188
> 	allocated image bytes: 4587599
> 
> Any suggestions are very welcome.
> 
> Thanks,
> Tim
> 
> 
> 
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