What the imager has

Started 6 months ago | Discussions thread
Roland Karlsson
Forum ProPosts: 20,481Gear list
Like?
Re: The Quattro Knows
In reply to DMillier, 6 months ago

DMillier wrote:

This debate is interesting but a bit philosophical.

And would someone who thinks they know please explain how it is possible to discriminate colour properly when each group of 4 adjacent pixels shares exactly the same values for the 2nd and third layers and only the top value can vary. That would seem to severely limited the colour values that the 4 pixels can read. I'm still puzzled by this. Unless it is doing a Bayer like thing and measuring the values of additional pixels from different spatial locations and using these to infer the missing values (or something).

I shall not explain that to you, because I do not believe it to be possible.

But, I do think it has potential for taking good photos.

There are two very simple solutions.

  1. Expand the two lower layers with a factor four and then apply ordinary Foveon maths.
  2. Apply ordinary Foveon maths on all three layers at 5 MP resolution, and then use the 4 top pixels to adjust the luminance.

Both those two are quite good and will probably result in problem free images.

But, you can probably do better. Just as research for Bayer images have lead to better and better result, so might this design be improved.

 Roland Karlsson's gear list:Roland Karlsson's gear list
Canon PowerShot G10 Pentax K-5 Pentax smc DA 15mm F4 ED AL Limited Pentax smc FA 50mm F1.4 Pentax smc DA 21mm F3.2 AL Limited +6 more
Reply   Reply with quote   Complain
Post (hide subjects)Posted by
(unknown member)
(unknown member)
(unknown member)
(unknown member)
(unknown member)
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow