What Workflow for Monaco profiling + Vuescan scanning ?

[Jean Delmas]

I try to compare those two workflows :

- scanner profiling with Vuescan + scanning images with Vuescan
- scanner profiling with MonacoEZcolor + scanning images with Vuescan.

Worflow for Vuescan profiling is quite easy to understand, but, for
Monaco, it is not clear to me. Can you give me advises about my
workflow. I specialy would like to know if "Exposure clipping:0" and
"Color balance:None" are right options for for scanning chart AND for
scanning image...

My workflow :

1 - Set options for scanning the IT8 chart (Wolf Faust 35 mm Ekta) :

Input Tab
- Task : Scan to file
- Media : Image
- RGB analogue gain : 1
- Exposure clipping : 0

Filter Tab
- All options : None

Color Tab
- Color balance : none
- Brightness : 1
- Brightness RGB : 1
- Scanner color space : ICC profile
- Scanner ICC profile : blank
- Output color space : Device RGB

2 – Preview IT8 chart

3 – Lock exposure in Input Tab

4 – Remember RGB exposure value in Input Tab

5 – Scan the IT8 chart

6 – Open the IT8 chart in Photoshop (don't attach any color space to
the chart) and clean it if necessary

7 – Make scanner profile with a profiling software (MonacoEZcolor for
me)

8 – Set options for scanning an image

Input Tab
- Same options as for scanning IT8 target
- Lock exposure
- RGB exposure : same value measured when previewing and scanning
chart

Color Tab
- Same options as for scanning IT8 target

9 – Scan image

10 – Open image in Photoshop CS (no space is attached)

11 – Attach scanner profile to image

Jean Delmas

 

[Jim]

I try to compare those two workflows :

- scanner profiling with Vuescan + scanning images with Vuescan
- scanner profiling with MonacoEZcolor + scanning images with Vuescan.

Worflow for Vuescan profiling is quite easy to understand, but, for
Monaco, it is not clear to me. Can you give me advises about my
workflow. I specialy would like to know if "Exposure clipping:0" and
"Color balance:None" are right options for for scanning chart AND for
scanning image...

To prepare a profile with Monaco, just follow the instructions in the
manual.
You disable color management in the scanner for both the profile and scan.
You can apply the profile in Vuescan if you desire. It does somewhat
simplify things.
To acquire a scan with Monaco, you apply the profile when you load the scan
into your software.

Exposure clipping 0 is a Vuescan command. I always implement this when I am
using Vuescan to acquire an image.

Jim

 

[Jean Delmas]

news:[email protected]...

You disable color management in the scanner for both the profile and scan.

I knew this. But how ? One of my questions is : what vuescan options
are "disable color management" ?

You can apply the profile in Vuescan if you desire. It does somewhat
simplify things.

No, you cannot apply a Monaco profile in Vuescan. Vuescan can only
read so called Matrix profile = simple Profile made with Vuescan =
profile which apply only constant gamma correction to 3 RGB channels.

Exposure clipping 0 is a Vuescan command. I always implement this when I am
using Vuescan to acquire an image.

But The question is : when you scan the chart (and when you scan an
image) must we put this option to 0 ?

Jean

 

[nikita]

Jean,

we don't need to put anything to 0 if we don't want to. You can
profile the scannner in any locked state and the profile will take
what's there. If anything is clipped and gone the profile cannot do
anything about that...if the grab is really screwed the profiling gets
a lot to tweak. I can see from your flowdescription that you know what
you want. From what I can see your right on track but look at the
following:

If I were you I would eliminate as much of the variables as possible
before profiling. Have a look at the pure RAW which comes in gamma 1.0
/16 bpc. Scan, adjust exposure up as much as possible without making
any clipping. Look at the histogram when in Photoshop. Lock exposure.
Memorize the value yes...

Scan the RAW IT8 target. Apply a real gammacurve in Photoshop curves
upwards till the GS 10/11 reads somewhere in the 100-110 RGB avaraged.
Check to see if the exposure would need any adjustment after the gamma
is applied. Build the profile.

Always use the this exposurevalue locked, always apply the gammacurve
by loading it on the scanned RAW and assign the profile. Then convert
to workingspace before doing any editing.

That is as straight the workflow can get. Using as few variables as
possible.

If you find that any of the preadjusted Vuescans works better, use it.
But basically you just need the RAW, the exposure and the gamma-bump.

nikita

Yes, you're right you can't use thirdparty profiles in the on-the-fly
CMS of Vuescan. Why should we? The profile is there to fix it up for
us when assigning it. It's faster to use photoshop tools after that
than trying to make any creative tweaks in Vuescan.