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Colour Correction

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    kat2290
    kat2290  392 forum posts
    9 Feb 2011 - 5:03 PM

    I've recently bought a new book by Scott Kelby about photoshop, in it he talks about the technique of using curves to colour correct an image. I've tried the technique and it seems simple enough, however I'm wondering whether or not it's a good idea to this to every photograph that im going to edit, is it necessary or not? How do I know if the colour in my image need correcting in the first place, is it just a personal choice?

    If I do decide to colour correct a photo and use the curves technique, is it best to correct it at the beginning or end of the PP?

    Thanks Smile

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    JamesGarfield

    I guess the first question would be: Is your monitor calibrated, is it showing you a true representation of the colours in the picture? If it's not then the colour correct would still be incorrect?

    CathyT
    CathyT e2 Member 87253 forum postsCathyT vcard United Kingdom18 Constructive Critique Points
    9 Feb 2011 - 5:10 PM

    I'd say its personal choice....or how you remember the photo....if you are working on a landscape you may wish to keep the colours very natural ..the same with a wildlife shot. On the other hand if you are working on a portrait you could be quite artistic in your approach.

    Dave_Canon
    9 Feb 2011 - 5:24 PM

    Perhaps it would be better to suggest that Curves can be used to alter the colour. Only a few types of photographers need colours to be very accurate (e.g. fashion photographers, product photographers). Most of us would not be happy with an obvious colour cast but getting every colour accurate is probably unnecessary. How far you go to achieve accuracy is up to you.

    Dave

    CathyT
    CathyT e2 Member 87253 forum postsCathyT vcard United Kingdom18 Constructive Critique Points
    9 Feb 2011 - 5:27 PM

    Are you referring to page 200??

    kat2290
    kat2290  392 forum posts
    9 Feb 2011 - 8:37 PM

    My monitor is calibrated Smile I'm just asking this because colour correction is not something i normally do (unless its very obvious) but whilst i was reading this chapter it occured to me that perhaps I should always be doing it. I suppose I'm just curious as to what other people do.

    Cathy- I don't have the book with me right now but if its the section where they are working on a dull picture of a guy on a bike in a street then yeah thats the one!

    CathyT
    CathyT e2 Member 87253 forum postsCathyT vcard United Kingdom18 Constructive Critique Points
    9 Feb 2011 - 8:48 PM

    UUmmm...no she's a model with a white shirt that isn't white....Wink

    To be honest...what ever you decide to do in your post processing can be tackled at any point..I fiddle about for ages tweaking this and that.

    Last Modified By CathyT at 9 Feb 2011 - 8:49 PM
    User_Removed
    9 Feb 2011 - 10:04 PM

    If you are using CS5, the skin tone correction facility is one way of "correcting" portraits. Otherwise, the eye dropper on a neutral grey is a good starting point.

    I am not sure about the "can be tackled at any point" point. I tend to think that colour balance should be corrected first, before adjusting the hue, saturation of luminance of individual colours.

    Last Modified By User_Removed at 9 Feb 2011 - 10:05 PM
    swanseamale47
    10 Feb 2011 - 8:16 AM


    Quote: Are you referring to page 200??

    Which book?, Scott's got quite a few out.
    Edit it's page 147 of Scotts the "Adobe photoshop book CS5 for digital photographers" (I think)

    Last Modified By swanseamale47 at 10 Feb 2011 - 8:26 AM
    jken
    jken  71672 forum posts United Kingdom1 Constructive Critique Points
    10 Feb 2011 - 8:58 AM

    You've got to start with screen calibration, it's a simple as that.
    If you're adjusting the image on screen from a print you've just produced how do you know which is correct if the screens not been calibrated.

    John_Frid
    John_Frid  8514 forum posts United Kingdom56 Constructive Critique Points
    10 Feb 2011 - 9:21 AM

    Perhaps an obvious question is do you think your images need to be colour corrected?

    If you are happy with the output (be it on screen or printed), then I see little need to get too worried about whether it is a completely accurate representation of the colours. Of course, if you are bothered about accurate colour display then you need to take more careful consideration. Whilst this starts with correct monitor calibration, this is only the start as a correctly calibrated monitor doesn't in itself correct your colours for you - it only ensures that you can see precisely what the colours are so you can apply the right correction.

    Whilst I strive to ensure (in the main)that my image colours are believable, I'm not always bothered that they are 100% accurate to how they actually were. Many of my images are seeking to recreate the feeling or emotion that I had at the time - if a scene was joyous then I have a tendency to make the colours more vibrant, whereas if it was more melancholy I may use a more subdued palette. In both of these situations I wouldn't bother too much about 100% colour correction. However, if I am shooting something where I want an accurate colour representation then I will use one (or more) of the various colour correction techniques. The one in Scott Kelby's book using curves is a fairly good general technique, but there are others.

    So to answer your question - only you can decide when 100% colour accuracy is required.

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