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Thread: Lab and L*a*b* color spaces

  1. #1
    muyisoldier
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    Lab and L*a*b* color spaces

    Predecessors,My ignorance
    I don't understand what's the difference between Lab color space and L*a*b*?
    I can not separate from them.

  2. #2
    Moderator super silja will become famous soon enough super silja's Avatar
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    Quote Originally Posted by muyisoldier View Post
    Predecessors,My ignorance
    I don't understand what's the difference between Lab color space and L*a*b*?
    I can not separate from them.
    Sometime CIE L*a*b* color space people write as CIELAB or only Lab.
    it's easier without shift-8.
    Hunter Lab color space is written without asterisk.
    Hunter Lab is a little bit different than CIE L*a*b*
    +-+-+-+-+-+ +-+-+ +-+-+ +-+-+-+-+ +-+-+-+-+
    |p|o|w|e|r| |t|o| |b|e| |y|o|u|r| |b|e|s|t|
    +-+-+-+-+-+ +-+-+ +-+-+ +-+-+-+-+ +-+-+-+-+
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  4. #3
    Junior Member yidixiang is on a distinguished road
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    We often write L*a*b* as Lab. But the right way is L*a*b* or CIELAB.
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  5. #4
    aaron125
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    Quote Originally Posted by muyisoldier View Post
    Predecessors,My ignorance
    I don't understand what's the difference between Lab color space and L*a*b*?
    I can not separate from them.
    You cannot separate them because they are one and the same - no difference whatsoever, except for how they are writen. The correct terminology is L*a*b* (with or without the preceding CIE), but it takes a long time to say and also to type/write out.

    There's no difference between them for all intents and purposes, these days. Silja is correct with the Huinter, but very few people uses or refers to Hunter Lab anymore, at least very rarely. Same as with 'color' and 'colour' (of course, one is more correct, that being the latter).
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  6. #5
    Junior Member ek3_mon is on a distinguished road
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    L*a*b*

    In addition. This stands for the coordinates or should I say units of numerical values from the color space.

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  7. #6
    aaron125
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    Quote Originally Posted by ek3_mon View Post
    In addition. This stands for the coordinates or should I say units of numerical values from the color space.
    Huh??? What stands for "numerical values from the color space"? What exactly are you trying to say or explain? I've no idea what you mean. Please elaborate.
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  8. #7
    Junior Member ek3_mon is on a distinguished road
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    Quote Originally Posted by aaron125 View Post
    Huh??? What stands for "numerical values from the color space"? What exactly are you trying to say or explain? I've no idea what you mean. Please elaborate.
    What Im trying to say is. When measuring color using colorimetry. Lab is like an axis that have a certain numerical equivalent values position in the color space.

    Black L36.0 a1.0 b4.0

    just like the cartesian X and Y axis.
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  9. #8
    muyisoldier
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    Quote Originally Posted by super silja View Post
    Sometime CIE L*a*b* color space people write as CIELAB or only Lab.
    it's easier without shift-8.
    Hunter Lab color space is written without asterisk.
    Hunter Lab is a little bit different than CIE L*a*b*
    Thank U~,i think your description is right , a selection between CIElab and Hunterlab in 500series spectrodensitometer's option of X-rite, so i doubt that~~
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  10. #9
    IuriBernardi
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    Quote Originally Posted by muyisoldier View Post
    Predecessors,My ignorance
    I don't understand what's the difference between Lab color space and L*a*b*?
    I can not separate from them.
    The same.
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  11. #10
    Junior Member quantic is on a distinguished road
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    Quote Originally Posted by aaron125 View Post
    Huh??? What stands for "numerical values from the color space"? What exactly are you trying to say or explain? I've no idea what you mean. Please elaborate.
    as you can see in the other post picture
    a value from -127 to + 127 indicate the balance betwen green and red in your color
    b value from -127 to +127 indicate the balance between blue and yellow in your color
    0 value are neutral
    the L value stands for the "drakness/lighness" of the color and goes from 0 to 100

    so you have 3 coordinate l a b like x y z
    hope it help

    and by the way these are real color description in the real world they mean the "same" whereever you use them hence their interest !
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  13. #11
    Junior Member redditor427 is on a distinguished road
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    Quote Originally Posted by muyisoldier View Post
    Predecessors,My ignorance
    I don't understand what's the difference between Lab color space and L*a*b*?
    I can not separate from them.
    Same thing.
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  14. #12
    Moderator super silja will become famous soon enough super silja's Avatar
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    Lab and L*a*b are not same thing

    Lab and L*a*b are not same thing
    +-+-+-+-+-+ +-+-+ +-+-+ +-+-+-+-+ +-+-+-+-+
    |p|o|w|e|r| |t|o| |b|e| |y|o|u|r| |b|e|s|t|
    +-+-+-+-+-+ +-+-+ +-+-+ +-+-+-+-+ +-+-+-+-+
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