Strange Colour conversions when making contact sheets out of iview

[sabfoto]

I made my first contact sheets via Iview to send with a submission.  A handfull of the thumbnail images on the contact sheets have a pretty bad magenta cast.  All files are from the same colour space, all tifs, all 8bit.  But only a few files get this strange cast.  I've ruled out a printer issue, since if I print the full-res tif file out itself, it perfectly matches the monitor.  Its something with the conversion in Iview.  Anyone had this issue?

Thanks in advance.

Sheldon Sabbatini

[peterkrogh]

Do any of the photos have Alpha Channels?
Peter

[sabfoto]

No Alpha Channels.  I also ran a contact sheet in PS CS2 and it didn't change the colour of the suspect images either.  Iview does everything in SRGB Correct?

Thanks.

Sheldon Sabbatini

[peterkrogh]

You should contact iView.
They honor the color profile in the file.
Peer

[sabfoto]

Thanks Peter.  Will do. 

[Rick McCleary]

Sheldon -

Is the magenta cast on screen or only in the print? 

If it's only in print, I would double and triple-check your CMS settings.  A magenta cast is a classic symptom of a file being double color-managed -- once by Photoshop, once by the print driver.

Also, I ran the "Show profile info" script on some iView-generated contact sheet jpeg's.  Guess what - no profile!  Looks like a bug that needs fixing in iVIew.

(However, this would NOT cause your strong magenta problem.  Depending on how you handle an untagged file, there might be a shift in density and/or saturation, but definitely not a strong magenta shift.)

[sabfoto]

Sheldon -

Is the magenta cast on screen or only in the print? 

If it's only in print, I would double and triple-check your CMS settings.  A magenta cast is a classic symptom of a file being double color-managed -- once by Photoshop, once by the print driver.

Also, I ran the "Show profile info" script on some iView-generated contact sheet jpeg's.  Guess what - no profile!  Looks like a bug that needs fixing in iVIew.

(However, this would NOT cause your strong magenta problem.  Depending on how you handle an untagged file, there might be a shift in density and/or saturation, but definitely not a strong magenta shift.)

Hi Rick,

The cast is both the print and the screen.  It isn't a CSM setting.  Basically, all of the original files look great on screen and print if I printed the individual files.  But when I make a contact sheet via Iview, the color cast of certain images are changed both on screen and in the printed contact sheet.  Its not every image, not an overall effect.  Its just particular images on the contact sheet.  So I'm not sure what is going on with those files during the conversion.  I have noticed that they all do have the same tone (usually) so maybe its just a conversion issue within the Iview process.

I haven't had time to send a query to Iview, but when I do I'll keep it posted here.

Thanks again for the responses!


Sheldon Sabbatini