On Sun, Jan 5, 2014 at 5:38 AM, Michal Suchanek <[email protected]> wrote:
> AFAIK the camera board is connected digitally so the noise is something > that is internal to the camera board. > > It is normal that under low light condition the image is noisy. Did you > try taking pictures in full daylight or using some photography lighting? > I have four other USB webcams and none of them have this noise under same lighting conditions. I have two other Allwinner systems with cameras and they all have noise. I checked it out this morning under sunlight. It is better but the noise is still there. Maybe the camera images need some image processing that is not getting turned on under the Allwinner platform? All of the Allwinner devices appear to be running Allwinner SDK with only minor changes. They probably all copied each other. The datasheet for the image sensor is here: http://files.virt2real.ru/docs/ It is also possible that image processing features of the sensor chip are not properly enabled. > > The noise can be removed in software and the AW chips should have some > image filter which is probably unused as of now. > > Thanks > > Michal > > > On 5 January 2014 06:32, [email protected] <[email protected]> wrote: > >> I have an A20 system here that has a lot of noise in the camera. Does >> anyone have experience with noise like this? Is this something that >> software can impact or is it a problem in PCB? It is OV2643 image sensor. >> >> Looks like it is using this driver. >> http://files.virt2real.ru/docs/ >> >> >> P1050011_1.JPG<https://docs.google.com/file/d/0B-2Z6FDzyIwrSkNucEdLRjVXQVU/edit?usp=drive_web> >> >> >> P1050013_1.JPG<https://docs.google.com/file/d/0B-2Z6FDzyIwrVkhyREhRQXBLaW8/edit?usp=drive_web> >> >> >> -- >> Jon Smirl >> [email protected] >> >> -- >> You received this message because you are subscribed to the Google Groups >> "linux-sunxi" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- Jon Smirl [email protected] -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
