Jump to content

Recommended Posts

When I select Lab in the info panel the values are shown as L W B. I think L must be Lumance. But what do W and B stand for? And why the values are not named as L, a and b?

Markus Wäger | German Autor | Graphic Design, Photoshop and Photography Expert | preparing a german book about Affinity Photo


Share this post

Link to post
Share on other sites

Speaking of Lab output values, I wonder which approach is 'correct' and make sense in terms of clipping to -128. Case in point is Green 255 in ProPhoto RGB. It is an 'illegal' imaginary color. In both Photoshop and Affinity Photo, it's shown as an aStar of -128. In Adobe's Lightroom, it's not clipped, it is shown as -187.7 (the decimal values CAN be useful, more later if you so desire). 


Which is correct and more useful to the end user? I personally prefer how Lightroom provides a value that doesn't clip to the +/- 128 value, it tells us this isn't a color! 



Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...

Important Information

Please note the Annual Company Closure section in the Terms of Use. These are the Terms of Use you will be asked to agree to if you join the forum. | Privacy Policy | Guidelines | We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.