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  1. #16
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    An exercise I use for teaching colour in Photoshop is to paint brushstrokes over a layer of an unknown target colour, trying to match the colour by adjusting the sliders until the brushstrokes become invisible. You then repeat the exercise using each of the different colour spaces (RGB, HSB, Lab) to compare the ease of each method for selecting colours. My students find using the RGB sliders in the colour palette to be interesting and instructive, but generally the slowest and most difficult way of getting an exact match. The quickest, easiest and most intuitive method is to use the Lab sliders in the colour picker, which allow you to independently adjust value (L slider), chroma (distance from the centre of the ab square) and hue (direction from the centre of the ab square). I'm sure that with practice you could get quite quick with the RGB sliders though.


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  4. #17
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    Do you have a smaller version? My internet can't handle this. haha.

    Thanks. As long as I can read the text and make out the images it's fine.

  5. #18
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    paper x, i dont suppose that if you have the time you could also give a quick translation of this one too
    http://amana.blogbus.com/files/12227741190.jpg

  6. #19
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    Extremely insightful. Thank you.

  7. #20
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    Quote Originally Posted by TZA View Post
    paper x, i dont suppose that if you have the time you could also give a quick translation of this one too
    http://amana.blogbus.com/files/12227741190.jpg
    Sure thing, I spent sometime on it today, check the first post.

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    TZA

  9. #21
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    I vote for sticky. Also, it would be great if the images could be uploaded using the attachment manager, in case in a few years the hosting expires. It would be a shame to lose this one.

    Thanks a lot for translating this for us unilinguals.

  10. #22
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    Yea....I vote for a sticky too.

    PaperX tried uploading it to CA's attachment manager, however the file was too big for the size limit so he had to host it on his blog...

  11. #23
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    I just read the whole tutorial but I still find the part about the rgb sliders a bit confusing. I'll just go over it again.

  12. #24
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    Thanks so much! Love your work! I saw this tutorial on your blog and thought, "DAMNIT I WISH I COULD READ THIS!" lol.. really helped demystify colors in photoshop.. CHEERS!
    MY DAILY SKETCHES

    If you can read this, I gave you 5 stars

  13. #25
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    The text is rather large. If the image was resized down so the text appeared in the same size it does on the forums, it could probably fit in the attachment manager.

  14. #26
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    Thanks to the both of you!

  15. #27
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    Quote Originally Posted by paperX View Post
    Sure thing, I spent sometime on it today, check the first post.
    sweet!!! cheers mang!

  16. #28
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    You are a king amongst men

  17. #29
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    I don't know why, but my experience with RGB is significantly different from yours.

    This is conversion between RGB and HSB:
    Brightness = (the most intense light/ 255)*100.

    Saturation = 100 - (the least intense light/ the most intense light)*100

    Hue: It's related to all three lights, but I haven't test it out yet.The next intense light deals ONLY with hue.
    [COLOR="Red"]Colors with the same brightness and hue have the same value of most intense light.
    Colors with the same saturation and hue have the same R/G/B ratio.
    Colors with the same saturation and brightness have the same value of least intense light and most intense light(their roles might change, but the amount is the same).


    I tested all the rules above and they all apply correctly.

    Though I don't know if you are talking about the adobe HSB system though.


    Anyway, great tutorial, an eye-opener.

    Edit: I read through David Briggs's wonderful tutorial again, and discovered your brightness is actually the lightness in HLS color space. Oops, all these systems are getting on my nerves.
    Last edited by Aaron Death; March 15th, 2009 at 12:11 AM.

  18. #30
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    great!
    lin ran~~
    lol~~~

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