QTR-Quadtone RIP

I've built a new curve for the R2400, I tried linearizing by measuring
every other step on the 100 step target.  Get banding/steps in a
smooth gradient after doing this.  If I linearize on the 21 step
target things seem ok.  Using a XRite-810.   Can I linearize using
more than 21 steps?
Thanks,
Dave

Opps, looks like I should be using the 51 patch random target, will do
some searching on that.
Dave

--- In QuadtoneRIP@yahoogroups.com, "deisenlord" <Dave.Eisenlord@...>
wrote:

>
> I've built a new curve for the R2400, I tried linearizing by measuring
> every other step on the 100 step target.  Get banding/steps in a
> smooth gradient after doing this.  If I linearize on the 21 step
> target things seem ok.  Using a XRite-810.   Can I linearize using
> more than 21 steps?
> Thanks,
> Dave
>

I got banding when I linearized using the 51step target while the 21step
worked fine. I'm using an X-Rite 810 with a 2100. Seems like more steps is
not neccessarily a good thing.

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

> I've built a new curve for the R2400, I tried linearizing by 
> measuring every other step on the 100 step target.  Get 
> banding/steps in a smooth gradient after doing this.  If I 
> linearize on the 21 step
> target things seem ok.  Using a XRite-810.   Can I linearize using
> more than 21 steps?

I'd tend to agree -- too many steps can be a detriment.
What I like the best is the 21x4,  you get 4 measurements for
each step and the software averages them.   The Eye-One
is setup to automatically do this but you can just measure with
the Xrite and include all the data in the text file.

Roy

On Monday, May 22, 2006, at 09:28  AM, Daniel Staver wrote:

> I got banding when I linearized using the 51step target while the 
> 21step
> worked fine. I'm using an X-Rite 810 with a 2100. Seems like more 
> steps is
> not neccessarily a good thing.
>
> --
> Daniel Staver
> http://daniel.staver.no
>
>> I've built a new curve for the R2400, I tried linearizing by
>> measuring every other step on the 100 step target.  Get
>> banding/steps in a smooth gradient after doing this.  If I
>> linearize on the 21 step
>> target things seem ok.  Using a XRite-810.   Can I linearize using
>> more than 21 steps?
>

-
Roy Harrington
roy@...
Black & White Photo Gallery
http://www.harrington.com

Roy, I did a measurement using the 21x4 target yesterday and noticed that one of the "b" 
values, at about the 85 or 90 step, was way out of line with that portion of the b curve.   
The b values in that area were in the .04 to .08 range and suddenly there was a .5.  This 
was the averaged measurement.  Would you trust that?

Ed  

--- In QuadtoneRIP@yahoogroups.com, Roy Harrington <roy@...> wrote:

>
> I'd tend to agree -- too many steps can be a detriment.
> What I like the best is the 21x4,  you get 4 measurements for
> each step and the software averages them.   The Eye-One
> is setup to automatically do this but you can just measure with
> the Xrite and include all the data in the text file.
> 
> Roy
>