Can you use an X-Rite ColorChecker Passport with scanned film?
Asked 6/20/2016
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2 answers
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I want to color-profile scanned film using an X-Rite ColorChecker Passport. The Passport software appears to only support certain DNG files, and when I convert my TIFF or JPEG film scans to DNG, the X-Rite software says it can't understand them. I'm scanning with an Epson V850. Is there a workable way to use the ColorChecker with film scans, or is this mainly intended for digital camera files?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
10y ago
2 Answers
1
Have you try the Adobe DNGProfile Editor?
For camera but not a scanner, this work flow is work:
1, Export it to .DNG files.
2, Import it into DNGProfile Editor.
3, Align the chart table as in 'chart' tag (fig.1):
4, Export it into a *.dcp profile.
5, Move this file into profile folder. For windows:
C:\Users\username\AppData\Roaming\Adobe\CameraRaw\CameraProfiles\*.dcp
After all, you can apply it in ACR.
If you are not satisfied with this approach, it is possible to manually adjust it in HSL panel just like the SpyderCheckr24 do (this kind of color checker exports the adjustment of HSL). Or in color tables in DNG Editor (recommended).
In fact, I suppose the reason of your failure is because of the negetive appearance and colour cast which may not compatible with programmes. Only manual operation will work if you can't generate a positive version of RAW files.
(Personally, I suggest the correction of scanner is more important with the positive apperance)
Originally by user75153. Source · Licensed CC BY-SA 4.0
user75153
8y ago
0
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Yes, but not in the same straightforward way as with a digital camera raw file. The ColorChecker Passport workflow is mainly designed for camera DNG/raw images, so converted TIFF/JPEG scans often won’t be accepted by X-Rite’s software.
A possible workaround is to use Adobe DNG Profile Editor instead of the X-Rite utility: export a DNG, align the chart in the editor, and build a .dcp profile for use in Adobe Camera Raw. However, this is more of a camera-style profiling workflow and may not work reliably for scanner/film files.
With film scans, the negative’s color cast and inversion process can confuse profiling software, so fully automatic chart-based profiling may fail. In practice, manual correction is often necessary after scanning/inversion, using HSL controls or color-table adjustments.
So: it may be possible to create a usable profile with Adobe’s tools, but the ColorChecker Passport software itself is not well suited to scanned film, and manual color adjustment is often the more practical approach.
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