SDIM0790.tif (13.8 MB)
This file is Public Domain.
2 Likes
9 Likes
Thanks Gents. I posted a TIFF because the raw is a Sigma X3F and not everyone can open those.
I couldn’t open the tif, and my settings seem to say I should be able to. It wont even show the file to select. dt 4.8.1
No problems here. As well on dt 4.8.1.
My fault. It had downloaded to the wrong directory.
Later: I am lost. What am I supposed to do to bring full color to this “blue and white” image?
Could you post the RAW as well?
Probably a bigtime foot-in-mouth exercise for me with this one. Quite difficult, exacerbated by the fact I’m terrible at color correction, particularly to this rather extreme degree. The end result looks more like a colorized B&W image rather than an original color shot, or maybe a color film shot. I can’t escape the feeling that I was just pushing sliders and have almost certainly contradicted myself with various adjustments either negatively affecting and / or duplicating others. But here 'tis…
ART 1.23
SDIM0790.tif.arp (17.6 KB)
[ edit ] Now that I look at it again an hour later, there’s too much red in the sky. Oh well…
1 Like
I will but the X3F is not showing in the Pixls upload dialog and hotspot problems are preventing me uploading to my site - thanks Verizon …
blue and white?
Here’s a jpeg:
Here’s a Hue Map at [75%] saturation in HSL … quite a lot of green:
Is this a jpeg directly from the camera or is it generated with third party software from the RAW?
http://kronometric.org/phot/temp/SDIM0790.X3F
Public Domain Deed - CC0 1.0 Universal - Creative Commons
Neither:
raw > proprietary Sigma Photo Pro 3.5.2 TIFF > FastStone Viewer JPEG 100% quality sub-sampled 4:2:0
1 Like
That is exactly what I see, too. I see nothing but shades of some off-blue color. Color correction and white balance do not help. But @popanz got a nice, full color spread.
I even studied about 20 web pages about the Foveon to try to figure it out, but I remain lost.
In the GIMP it is possible to decompose an RGB image into for example Hue, Saturation and Value.
Then set the Saturation layer to pure white = 100% saturation and the Value to pure white = 255/255 … the easier to see the hues … and then recompose, resulting in a really obvious hue map:
As to the Foveon, the only noticeable difference to me is no color moire … and the large amount of hot air re: Foveon vs. Bayer et al. I’ve been a Foveonista for about a dozen years.
Feel free to browse here:
I understand the idea of better color due to every pixel being uniformly covered by the R, G, and B layers. What I am lost about is, how to convert the image from the top post into an image that displays the colors from the scene. Can it be done with darktable, or would I have to use a more elemental tool such as the GIMP?
PS - I will examine popanz’s xmp and see what he did. I probably should have done that from the start, but I like to figure things out for myself.
My edit is a mess and has not much of a normal RAW processing. Even so the result looks in the end quite OK, I started to cheat on the sky.
1 Like
Ok, this is not intended to be a full edit, only a proof-of concept. I was able to start to get some good coloration using only the Color Equalizer module. I apologize for all the noise in the thread.
SDIM0790.tif.xmp (6.2 KB)
1 Like
2 Likes