On Wed, May 27, 2009 at 8:28 PM, Guennadi Liakhovetski <g.liakhovetski@xxxxxx> wrote: > On Wed, 27 May 2009, Dongsoo, Nathaniel Kim wrote: > >> Hi Guennadi, >> >> In my opinion (in totally user aspect) those CIDs you mentioned do not >> fit in the purpose. Only low-pass filtering control could be >> considered as a colorfx, even though low-pass filtering is not a color >> effect it could be possible to sense the meaning of effect on it. How >> about making a new CID for band-stop filtering control and >> V4L2_COLORFX_BORDER_DENOISING for low-pass filter? > > Maybe, let's see what others say. Although, the low-pass filter doesn't > seem to be directly related to colour-transformation to me. > Yep, could be differ in person I guess. But if no more new CID is allowed I think the COLORFX could be the closest one. Let's see what others say :-) >> BTW, would you give more information about "fluorescent light >> band-stop filter" in detail? Because if you mean flicker control >> caused by power line frequency, 50Hz...60Hz thing, I think we already >> have one for that. As far as I know, V4L2_CID_POWER_LINE_FREQUENCY is >> for that flickering control. > > No, here's an excerpt from a datasheet (not for the camera I'm > implementing this, but it's the same parameter, I think): > > COMJ[2] - Band filter enable. After adjust frame rate to match indoor > light frequency, this bit enable a different exposure algorithm to cut > light band induced by fluorescent light. > > Not sure though how they reduce the fluorescent light by adjusting the > exposure algorithm. Oh, it definitely looks like a flickering control to me. Interesting algorithm it is. I should do some research for that. Cheers, Nate > > Thanks > Guennadi > --- > Guennadi Liakhovetski, Ph.D. > Freelance Open-Source Software Developer > http://www.open-technology.de/ > -- = DongSoo, Nathaniel Kim Engineer Mobile S/W Platform Lab. Digital Media & Communications R&D Centre Samsung Electronics CO., LTD. e-mail : dongsoo.kim@xxxxxxxxx dongsoo45.kim@xxxxxxxxxxx -- 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
