Digital BW, The Print

Hi,

It is now possible to linearize curves with a scanner in QTR.

1. Print a 21 step wedge using a non-linearized curve.

2. Scan the image. I use an Epson 3200 and switch off all adjustments in 
the twain driver.

3. You want to read the L value from each step on the stepwedge. I 
switch the secondary color in the info palette to LAB and use the color 
picker with the 5x5 average option for this.

4. Start with white and use that as your first value in QTRgui. Then 
read each step down to black. The order starting with the highest value 
is important, as QTR uses this to differentiate from density readings 
which start with the lowest value.

Obviously a scanner isn't as accurate as a densitometer, but my first 
tests here seems promising. I believe this is a really good and 
inexepensive way for many to create their own profiles.

I see clear separation in each step and the stepwedge prints very 
similar to one printed with Paul's UT7 neutral curve on EEM.

--
Daniel Staver
http://daniel.staver.no