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DP2m: first images, first problems

Started Oct 28, 2015 | Discussions thread
Roland Karlsson Forum Pro • Posts: 30,033
Re: DP2m: first images, first problems

mclaudio wrote:

yes, I have seen the problem only in clouds (expecially in high contrasted zones), in fog conditions, and in some snow conditions

All this hints at it being a conversion problem, due to non linearities in the brighter areas. It is very hard to convert the Foveon image when it starts to go non linear in any of the channels.

For RGB cameras, like Bayer, this is not a big problem. If one of the channels start hitting the non linear region, then the image only gets more neutral, i.e. no so much of the clipping channel.

But for foveon, all three resulting RGB chanels are depending on all three foveon RAW channels. If one start clipping, all three are affected, some with positive sign and some with negative. Ops, the blue sky is green or purple. The same for clouds.

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/Roland
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