Hello!
Thank you so much for Argyll CMS! Just wanted to say that.
I attached a screen shot of the graph of an XYZ ICC profile I created and I
am wondering what it means about the icc profile. As you can see , what I
believe is the whites are completely spit on one end of the graph.
I am new to delving into this and I i guess the profile is clipping each
channel at different levels?
The Setup:
I am photographing an Xrite ColorCheckerSG under HID Northlights with
a PENTAX 645Z.
My process:
1. create .ti3:: scanin -dpin -G1 test.tif colorcheckerSG.cht
colorcheckerRef.txt
2. Add D50 white and black values to .ti3 file ( WHT: 96.4200 100.000
82.4910 . BLK 0.000, 0.000, 0.000 ). This is supposed to keep the profile
from changing the luminance of the image when applied. Maybe that is not a
great idea?
3. Create XYZ color profile:: colprof -Zr -qh -u -ax test
4. Create Graph for profile:: xicclu -g -fb test.icm
I am exploring creating custom profiles and understand that Matrix profiles
would be suggested for camera icc profiles. Which I also make. But I am
wondering why when creating XYZ or LAB profiles the curves become wonky.
Even under Strobe lighting the XYZ curve will have a good dip and wobble in
the curve when it gets near the upper left of the xicclu graph.
Thank you for your time!
Here are the source files I am using to create the profile:
ColorCheckerSG.cht
<https://drive.google.com/file/d/0BzGl-rJtgJ-VbnN2V0I0azNRUHM/view?usp=drive_web>
colorCheckerSG_CHM_reference.txt
<https://drive.google.com/file/d/0BzGl-rJtgJ-VZVNzdFQ2WU9LSlE/view?usp=drive_web>
HID-zr-u-qh-ax-D50.icm
<https://drive.google.com/file/d/0BzGl-rJtgJ-VLWtrWm9NY3B3TnM/view?usp=drive_web>
HID-zr-u-qh-ax-D50.tif
<https://drive.google.com/file/d/0BzGl-rJtgJ-VZXV4ZnFtSzVKeDA/view?usp=drive_web>
Attachment:
xicclu-g-fb-HID-zr-u-qh-ax-D50.JPG
Description: JPEG image
