PaulWhiting

<p>Andrew,</p> <p>Thanks for the Luminous Landscape tip... ironically, I check their site every day, didn't know they had a discussion section! I'll check that out. Most of my help with QuadTone is on a Yahoo! group dedicated to that software, and frequented by Roy Harrington, the program's author. He's very helpful, but I've had some sort of block due to what I thought was a limitation of not being able to enter L values. But now, thanks to your tip, I may be able to cross that hurdle.</p> <p>Your comments on the other parameters were very helpful, actually I think I'll be working in RBG, not sRBG. BTW, what is Lstar? L*ab?</p> <p>Thanks again,</p> <p>Paul</p>

<p>Actually, the Kodak scale only has 20 steps... just checked. It goes from 0.05 to 1.95. The scale on page 15 is a calibration printout from QuadTone, and indeed that does have 21 steps. That's where it gets confusing, for me anyway.</p> <p>Regards,</p> <p>Paul</p>

<p>Thanks so much, Andrew, this may be just what I'm looking for.</p> <p>Sounds like you are familiar with QuadTone RIP. That's helpful, too. I'm printing exclusively in b/w and I can create a curve up until the last step. I get stuck on linearizing my curve, ie filling in those 21 squares - QTR's Curve Maker accepts either Density (and I don't have a densitometer, nor access to one) or L values. I can read the RGB values of each square, using the Photoshop Elements eyedropper. So if I can convert those readings to L values, I'd be home free. One point of confusion... the Kodak grey scale, which is used for reference, has only 20 squares, not sure what to fill in the 21st square.</p> <p>I may have further questions at some point. I'm not sure what to fill in from Ref. White on down, I've studied the explanation on the Learn More page but it will take more than one read. Once again, thank you very much - this could be a real breakthrough for me.</p> <p>Your website is phenomenal as well. Much of it way over my head, but I've bookmarked both Bruce's and yours.</p> <p>Best regards,</p> <p>Paul</p>

<p>I've been using Elements (now ver 9) for years but I miss a feature found only in the full version of PhotoShop. I'd like to be able to edit in the Lab L (or Luminance, whatever it's called) mode. I need this so I can linearize a curve in QuadTone RIP.</p> <p><br /> Having seen some favorable comments here on Paintshop Pro, I downloaded the pdf but could find no mention of this mode. Perhaps I missed it... does anyone know if Paintshop Pro has this feature?<br /> <br />Thank you.</p>

<p>Thanks, Andrew, very helpful. Your article covered more than LAB... to tell the truth I never understood those other color spaces either - until now!</p> <p>Sounds like you're familiar with QuadTone RIP also... </p> <p>Regards,</p> <p>Paul</p>

<p>#JDM:</p> <p>I'm intrigued! Please help me understand this phrase: "the ever-intriguing Lab."</p> <p>I'm working on a profile for b/w printing (using QuadTone RIP if you're familiar with that program) I'm supposed to enter the Lab values of various shades of grey. I'm using Elements, which does not have that mode, unfortunately. So, just what is "Lab"?</p> <p>Many thanks, and</p> <p>Intrigued,</p> <p>Paul</p>