Monday, 11 May 2009

Colour matching experiment, Inishmore, Ireland, 2007reflection

How often do you hear some­body talk­ing about “pho­toshop­ping” an image? It often seems that in this case, people either don’t really know what you can do with Pho­toshop, or what it is usu­ally used for.

Well, in any case, a fun way of using Pho­toshop (and GIMP and the other pro­grams) is col­our match­ing. This basic­ally means the fol­low­ing: Take your lame pic­ture, and also take an amaz­ing pic­ture of some fam­ous artist /​painter that really knows his stuff (about col­ours) and finally use least squares (or the likes) to match the col­ours of the kick-​ass image to your lame-​ass image.

About two years ago tried this tech­nique on the above photo, which in itself was pretty much grey-​in-​grey. The pic­ture I “stole” the col­ours off was the rather fam­ous and mind­bog­gling Wan­derer über dem Nebel­meer (“Wan­derer Above the Sea of Fog”) by Cas­par David Friedrich.

There you go, Ulf, another tech­nique to spice up washed out pictures ;-)

Focal length: 24 mm (≈36 mm)
Aperture:ƒ/9.0
Exposure:1/100 s
ISO:100
Lens:Sony 18-70
Location: Aran Islands, Ireland
Posted at 18:59

2 Comments »

  1. You know what I just thought about:
    Why don’t I just take one of those kick-​ass-​paintings and apply the col­ors from my lame cam­era? :-)

    As a more ser­i­ous applic­a­tion: Whenever we’re trav­el­ing in a group we syn­chron­ize the clocks of our cam­eras so that we can copy all the pic­tures together after each jour­ney.
    Now, what we haven’t done so far is adjust­ing the color set­tings of dif­fer­ent cam­eras. I’m always aston­ished how dif­fer­ent cam­eras (in tourist-​automatic-​mode) can really take com­pletely dif­fer­ent pic­tures of the same scene. Your color match­ing tech­nique could help get­ting rid of these problems.

    Ulf — 12 May 2009 @ 2:16
  2. Lol, that might be some technique ;-)

    While the clock-​synchronisation trick is a pretty import­ant and handy one, there are hun­dreds of factors influ­en­cing the col­ours. I assume, bey­ond expos­ure, the other very imme­di­ate one is the (auto)white-balance, i.e. how do dif­fer­ent auto­matic modes judge the gen­eral col­our tem­per­at­ure of a scene. Then there’s also the actual col­our pro­files of the cam­eras them­selves.

    If you want accur­ate col­ours for every­one, the solu­tion would prob­ably have to be: shoot all pic­tures in RAW and cre­ate (and then use) cus­tom col­our pro­files for each of the cam­eras (using col­our checker charts and e.g. Adobe’s DNG pro­file cre­ator). That’s what the pros do, when they need very accur­ate and faith­ful col­ours (espe­cially for instance in product pho­to­graphy).

    Another import­ant link in the chain is col­our man­age­ment of your screen, but that’s a whole dif­fer­ent story… I shall elab­or­ate on this some more in later posts.

    Florian — 12 May 2009 @ 7:54


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