Jump to content


Photo

Exporting Jpg


  • Please log in to reply
7 replies to this topic

#1 Magnus bilder

Magnus bilder

    Member

  • Stunners
  • PipPip
  • 20 posts
  • LocationEskilstuna, Sweden
  • Lenses:Nikon 18-55mm f/3.5-5.6G AF-S DX VR / Nikon 35mm f/1.8G AF-S DX / Nikon 55 mm micro AI-S / Sigma 75-300, Nikon 300 mm f/4 PF ED VR
  • Camera Body or Bodies:Nikon D7200, Nikon D3200

Posted 03 October 2015 - 03:33 AM

I use Darktable to process my RAW files. It works great but now i ran into an issue. I exported a RAW to JPG 8-bit and the colors come out wrong, green in this case. Could be the white balance but i am not sure. I tried exporting as J2K (JPEG 2000) and then it works. I could then open the file in GIMP and save it as "normal JPG" and it looks fine. Usually GIMP gives me an error if exporting would change something but not in this case and the file comes out OK. Any ideas?

 

Attached File  Gömmande rådjur0001 grönt.jpg   341.77KB   0 downloadsAttached File  Gömmande rådjur0001 normalt.jpg   346.82KB   0 downloads



#2 K_Georgiadis

K_Georgiadis

    Master Photographer

  • Stunners
  • PipPipPipPipPipPipPipPipPipPip
  • 1,513 posts
  • LocationNew Jersey
  • Lenses:Sigma 24-105mm F4 DG
    Sigma 17-70mm
    Tamron 90mm macro
    Tamron 70-300mm
    Sigma 150-600mm
    Canon 17-40 mm 4.0 L
    Canon 50 mm 1.8
  • Flashes:Bolt VX-710C
  • Camera Body or Bodies:Canon 6D
    Canon Rebel 7D Mark II
    Canon Rebel T3i

Posted 03 October 2015 - 07:01 AM

it sounds like a software issue, perhaps the a result of a file corruption. If you are using Windows, try System Restore, restoring the computer to a date before the first manifestation of this issue.

#3 RAH1861

RAH1861

    <3 SDP

  • Stunners
  • PipPipPipPipPipPipPip
  • 570 posts
  • LocationHampton, NH
  • Lenses:Sigma 17-50mm f2.8; Canon 60mm macro; Canon 400mm f5.6L; Canon 10-18mm; Canon 24mm pancake; Canon 55-250; Tamron 70-300; Sigma 18-250; Samyang Fisheye; Samyang 16mm; Samyang 35mm; Tokina 12-24mm
  • Flashes:YongNuo YN-468 II
  • Camera Body or Bodies:Canon 80D; Canon 60D; Canon SL1; Olympus E-M10; Panasonic GM5; Panasonic Lumix LX5

Posted 04 October 2015 - 06:34 AM

This sounds like a color space problem to me. Sometimes when I open an image in Corel PaintShop Pro it warns me that it is going to use sRGB color space and the color can change. There are different color space settings for images, as discussed here:

 

https://en.wikipedia...RGB_color_space

 

And Darktable has a section in its help about it (under "Color Management" if this link fails):

 

http://www.darktable...s02s10.html.php

 

I am almost positive that this is where the problem is, although I don't understand all the issues myself. On your export from RAW to jpg, I'd check to see that the color space is set to sRGB and look at whatever settings there are for color.

 

I doubt very much that it has anything to do with whitespace or any actual camera settings or something like that.


  • Magnus bilder likes this

Rich


#4 Magnus bilder

Magnus bilder

    Member

  • Stunners
  • PipPip
  • 20 posts
  • LocationEskilstuna, Sweden
  • Lenses:Nikon 18-55mm f/3.5-5.6G AF-S DX VR / Nikon 35mm f/1.8G AF-S DX / Nikon 55 mm micro AI-S / Sigma 75-300, Nikon 300 mm f/4 PF ED VR
  • Camera Body or Bodies:Nikon D7200, Nikon D3200

Posted 04 October 2015 - 09:15 AM

Not using Window, will never happen :)

 

Exporting as JPEG (8-bit) and all set to default = green tint

Exporting as JPEG (8-bit) and set to sRGB = green tint

Exporting as JPEG (8-bit) and set to adobe RGB = no green tint (like it should be)

 

Exporting as JPEG 2k (12-bit) and set to sRGB = no green tint (like it should be)

Exporting as JPEG 2k (12-bit) and set to aRGB = no green tint (like it should be)

 

No real difference in the last two, sRGB looks a bit "better" but the problem isnt there in any of them. This gives me the conclusion that something is not working with JPEG (8-bit) using sRGB, and that is strange since i in the camera shoots in sRGB (perhaps that dont matter in RAW?). Also it could not be just using sRGB that messes it up since that setting works with JPEK 2k. The fact that i suspect white balance it because i know that i changed that in my edit, using flash in a green shrubbery makes everything have a green tint obviously :)



#5 P Bender

P Bender

    Master Photographer

  • Stunners
  • PipPipPipPipPipPipPipPipPipPip
  • 5,994 posts
  • LocationUpstate New York
  • Lenses:EF 600 f 4.0L IS USM II
    EF 400 f 2.8L IS USM II
    EF 400 f 5.6L USM
    EF 28-300 f 3.5-5.6L IS USM
    EF 70-200 f2.8L IS USM II
    EFS 18-135mm IS USM
    EF 16-35MM F 2.8L USM II
    EF Extender 1.4 iii
    EF Extender 2.0 iii
  • Flashes:Canon 580 EX ii speedlight
  • Camera Body or Bodies:Canon 5DsR
    Canon 7D Mark ii
    Canon 7D
    Van Guard 283 CT Tripod
    Induro Stealth CLT 403 Tripod
    4th generation Mongoose 3.6 Gimbal Head

Posted 04 October 2015 - 09:22 AM

Not using Window, will never happen :
  The fact that i suspect white balance it because i know that i changed that in my edit, using flash in a green shrubbery makes everything have a green tint obviously :)


Your last statement is most likely the cause of the green tint of the deer. There may also be issues with your software, shoot something else and look for similar problems.
Paul

Photos are a moment in time, that can only be captured once.

#6 RAH1861

RAH1861

    <3 SDP

  • Stunners
  • PipPipPipPipPipPipPip
  • 570 posts
  • LocationHampton, NH
  • Lenses:Sigma 17-50mm f2.8; Canon 60mm macro; Canon 400mm f5.6L; Canon 10-18mm; Canon 24mm pancake; Canon 55-250; Tamron 70-300; Sigma 18-250; Samyang Fisheye; Samyang 16mm; Samyang 35mm; Tokina 12-24mm
  • Flashes:YongNuo YN-468 II
  • Camera Body or Bodies:Canon 80D; Canon 60D; Canon SL1; Olympus E-M10; Panasonic GM5; Panasonic Lumix LX5

Posted 04 October 2015 - 10:10 AM

One thing I think is that you might want to consider exporting your image to 16-bit TIF (uncompressed or compressed), then opening it in an image editor, perhaps doing some more tweaking, and then saving to jpg. If your editor won't handle a 16-bit tif, just use 8-bit tif.

I mean, myself I never do all my editing in the raw converter program. I know that in this day of doing everything in Lightroom (including your laundry!), that is common. But I think that the best work-flow might be as I said. You might just bypass this whole problem if you did it like that.

This is not to say it wouldn't be interesting to know what is going on with the jpg problem. :)
 


Rich


#7 JestePhotography

JestePhotography

    Master Photographer

  • Stunners
  • PipPipPipPipPipPipPipPipPipPip
  • 4,654 posts
  • LocationMosquitoville(lol), Alberta
  • Lenses:Nikon 400mm f2.8E FL ED VR
    Sigma 120-300mm f2.8 DG OS HSM sport
    Nikon 105mm f2.8 AF-S VR IF ED
    Nikon 1.4, 1.7 and 2x TC
    Tripod: Manfrotto 055CXPRO3
    Gimbal Head: Jobu Designs BWG-HD3 Heavy Duty MKlll
  • Flashes:Yuongnuo 560lll
  • Camera Body or Bodies:Nikon D7000, Nikon D4S

Posted 05 October 2015 - 11:10 AM

If your camera can shoot in Adobe RGB you should do so. By shooting in sRGB you reduce your dynamic range.

#8 RAH1861

RAH1861

    <3 SDP

  • Stunners
  • PipPipPipPipPipPipPip
  • 570 posts
  • LocationHampton, NH
  • Lenses:Sigma 17-50mm f2.8; Canon 60mm macro; Canon 400mm f5.6L; Canon 10-18mm; Canon 24mm pancake; Canon 55-250; Tamron 70-300; Sigma 18-250; Samyang Fisheye; Samyang 16mm; Samyang 35mm; Tokina 12-24mm
  • Flashes:YongNuo YN-468 II
  • Camera Body or Bodies:Canon 80D; Canon 60D; Canon SL1; Olympus E-M10; Panasonic GM5; Panasonic Lumix LX5

Posted 05 October 2015 - 12:53 PM

The OP says he is shooting RAW. I doubt if you have any choice in how a camera stores its RAW files. It is his PP software that he is having a problem with, if I read it correctly.


Rich





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users