Hi Javier, On Friday, March 8, 2013 1:37:38 PM, Javier Martin wrote: > Hi Benoît, > > On 8 March 2013 12:53, Benoît Thébaudeau <benoit.thebaudeau@xxxxxxxxxxxx> > wrote: > > > >> Regarding 3, you say it works nicely for you in kernel 3.4.5. I've > >> migrated my code to that version but I still get colours that lack > >> enough intensity. > >> This is a snapshot "a" taken with my mobile which is much more similar > >> to what I can really see with my eyes: > >> http://img96.imageshack.us/img96/1451/20130307171334.jpg > >> > >> This is a similar snapshot "b" taken with mt9m131 in my board. It > >> shows that colours tend to be dull and darker, specially green: > >> http://img703.imageshack.us/img703/6025/testgo.jpg > >> > >> Are the snapshots you take with your HW more similar to "a" or to > >> "b"? Perhaps I am being too picky with the image quality and this is > >> all what mt9m131 can do? > > > > I fear that my captures are closer to "b". Your description of "3" was > > giving > > the impression of flashy colors. But the impression that this sensor gives > > me is > > rather a superimposed gray film. This effect is more or less visible > > depending > > on the lighting conditions, but it never seems to produce high quality > > colors. > > Yes, yours is probably is the best description for the image quality > this sensor provides with the current settings. > Well, this is a bit disappointing. Let's see if some other user has a > similar experience with it or comes up with a way to improve it. > > I've tested several things such as disabling auto white balance and > auto exposure and try to manually change colour gains but it seems the > sensor simply ignores the latter. > > There is an evaluation board from Aptina > (http://www.digikey.com/product-detail/es/MT9M131C12STCH%20ES/557-1251-ND/1643271) > but, unfortunately, I don't have one of these available. It could be > very useful to test the sensor with this board with the configuration > Aptina recommends and see whether the "grey layer effect" still > persists. It is perhaps also possible to find their recommended register settings somewhere without having this evaluation board. > I will try to contact Aptina's technical support but, according to my > previous experience, there is no guarantee we get a clarifying answer. > I'll keep you updated nevertheless. Thanks. Best regards, Benoît -- 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
