Here are some of my problem images.

http://www.nevermindhim.com/fuji-xtrans-samples

Also included on the page is my style for denoising.


On Tue, Apr 26, 2016 at 11:04 AM, J. Liles <malnour...@gmail.com> wrote:

> Group,
>
> I've recently acquired a camera with an X-Trans sensor, and have had
> little trouble generating images that contain areas prone to demosaicing
> artifacts.
>
> Is anyone interested in these? If so, is there a certain place I should
> host/send them? I have camera generated JPG for comparison along with the
> RAF files.
>
> In playing around I've discovered a few things:
>
> 1) Color smoothing is mandatory, as fine lines and especially specular
> highlights will always generate nasty color artifacts when using the baisc
> demosaicing. Seems like a smarter highlight recovery algorithm could help
> identify many of these problem spots.
>
> 2) None of the 'denoise' modules have sufficient parameter ranges to deal
> well with the X-Trans files.
>
> 3) When sufficient denoising is performed to remove maze and color
> artifacts, the difference between VNG and Markesteijn demosaicing is
> indiscernible.
>
> I have a style preset which can produce images that match the camera JPGs
> as far as noise/detail goes (utilizing the equalizer module) at ISO 3200.
>
> Color is another matter, but I've ordered one of the Wolf Faust IT8 charts
> to try and make an ICC profile.
>
> (I tried making one using the imaging-resource.com multi target studio
> shots, and while the results were OK, they weren't great).
>
> P.S. Is there any plan to support Fuji's RawExposureBias exif tag? It is
> necessary to display high ISO RAF images at the correct brightnesss.
>

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