Hi Enric, On Friday 28 September 2012 17:32:36 Enric Balletbò i Serra wrote: > 2012/9/28 Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>: > > On Friday 28 September 2012 10:21:56 Enric Balletbò i Serra wrote: > >> 2012/9/28 Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>: > >> > On Thursday 27 September 2012 18:05:56 Enric Balletbò i Serra wrote: > >> >> 2012/9/27 Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>: > >> >> > On Wednesday 26 September 2012 16:15:35 Enric Balletbò i Serra wrote: [snip] > >> >> >> Nonetheless, I changed the driver to configure for BGGR pattern. > >> >> >> Using the Sensor->CCDC->Preview->Resizer pipeline I captured the > >> >> >> data with yavta and converted using raw2rgbpnm program. > >> >> >> > >> >> >> ./raw2rgbpnm -s 752x480 -f UYVY img-000001.uyvy img-000001.pnm > >> >> >> > >> >> >> and the result is > >> >> >> > >> >> >> http://downloads.isee.biz/pub/files/patterns/img-000002.pnm > >> >> >> http://downloads.isee.biz/pub/files/patterns/img-000002.bin > >> >> >> > >> >> >> The image looks better than older, not perfect, but better. The > >> >> >> image is only a bit yellowish. Could be this a hardware issue ? We > >> >> >> are close to ... > >> >> > > >> >> > It's like a white balance issue. The OMAP3 ISP hardware doesn't > >> >> > perform automatic white balance, you will need to implement an AWB > >> >> > algorithm in software. You can have a look at the omap3-isp-live > >> >> > project for sample code (http://git.ideasonboard.org/omap3-isp- > >> >> > live.git). > >> > >> So you think the sensor is set well now ? > > > > I think so, yes. > > > >> The hardware can produce this issue ? Do you know if this algorithm is > >> implemented in gstreamer ? > > > > I don't know, but if it is the implementation will be software-based, and > > will thus be slow. The OMAP3 ISP can compute AWB-related statistics in > > hardware and can apply per-color gains to the image. The only software > > you then need will retrieve the statistics, compute the gains from them > > and apply the gains. That's what the sample code in omap3-isp-live does. > > This should at some point be integrated as a libv4l plugin. > > So I can use your software to test if it's a white balance issue ? Yes, but that's really a test application, it might not work out of the box. > (as the omap3-isp-live has this support if I understood). I'll try this, > do you can provide some tips on how use the omap3-isp-live ? Just compile and run it :-) -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
