Coolscan 5000 IT8 Calibration & HDR to Photoshop Problem

All the problems with Nikon film scanners

dcdougan
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Posts: 1
Joined: Fri Dec 26, 2008 3:11 pm

Coolscan 5000 IT8 Calibration & HDR to Photoshop Problem

Postby dcdougan » Fri Dec 26, 2008 3:51 pm

Hi, I am having problems getting my Coolscan 5000 with Silverfast Ai(IT8) and HDR set up properly for scanning slide film. I scan, process through HDR and the images seem fine, once I get into Photoshop the histogram is compressed to the left half and image is dark and flat. I am sure I have something set up wrong in either AI or HDR. I followed Ian Lyons Tutorials on Basic Steps to IT-8 Calibration and Basic steps for optimising high-bit Scans. I am able to Scan and Process negatives with no issues, struggling with positives.

Here are my CMS Settings in Ai
Color Management
Input -> Internal = Internal Color Management
Internal -> Monitor = Internal Color Management
Internal -> Output - RGB

Profiles for ICM
Input = SF_T (Nikon LS-5000)
Internal = Chrome Space 100 J. Holmes
Grey = QTR Gray Matte Paper
Rendering Intent = Perceptual

Embedded ICC Profiles
Embed IC Profile is checked
Profile to Embed = SF_T (Nikon LS-5000) Note: Seems like this should be Chrome Space 100 J. Holmes but I can't change this.

Scans are made in Ai 48 Bit HDR Colour

HDR CMS Settings

Colour Management
Input -> Internal = Used Embedded Profile
Missing Profile is checked
Internal -> Monitor = Image Colour Matching
Internal -> Output - RGB

Profiles for ICM
Input grayed out
Internal = Chrome Space 100 J. Holmes
Grey = QTR Gray Matte Paper
Rendering Intent = Perceptual

Image specifics from assign profile dialogue (all grayed out)
Input -> Internal = Used Embedded Profile
Input profile = SF_T (Nikon LS-5000)

Embedded ICC Profiles (all grayed out)
Embedded Profile = SF_T (Nikon LS-5000)
Embed ICC Profile is checked
Profile to Embed = Chrome Space 100 J. Holmes

Process the HDR Image seems fine in the HDR software - Good histogram. Open in Photoshop dark image with histogram to the left half.

Thoughts / advice appreciated.

LSI_Heidorn
SilverFast Expert
SilverFast Expert
Posts: 435
Joined: Fri Jan 18, 2002 1:00 am
Location: Germany

Re: Coolscan 5000 IT8 Calibration & HDR to Photoshop Problem

Postby LSI_Heidorn » Wed Jan 21, 2009 11:33 am

Dear dcdougan,
it is okay that the Ai Software embeds the scanner profile as you do HDR Scans which are *not* subject to CMS processing.
So SilverFast basically writes those files embedding the scanner profile to pass the info about the RGB "flavor" of the data.

In the HDR Software one info is missing for me to judge the problem:
Are you scanning HDR 48 Bit (thats what i am expecting) to the final file or are you using 48 Bit Color (if using this the embedded profile should be your chrome profile) ?

best regards,

Nils Heidorn


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