Re: Using a MacBeth Color Checker test chart
Re: Using a MacBeth Color Checker test chart
- Subject: Re: Using a MacBeth Color Checker test chart
- From: Jim Rich <email@hidden>
- Date: Sun, 16 Dec 2001 10:44:15 -0500
On 12/15/01 7:35 AM, "Schiller, Susan" <email@hidden> wrote:
Susan,
To understand your question better, I want to pose a few questions. Why do
you want to use a Macbeth Color Checker chart when scanning photos? Or why
not use some brand of grayscale target when scanning?
Is your intent on using the Macbeth Color Checker to make the Macbeth Color
Checker match when you scan and then you will assume that the photo will
match also?
Are you using profiles in your workflow?
My experience indicates that if you are not using profiles and you are
scanning an image and then correcting the image (and not the Macbeth Color
Checker ) with color correction techniques like set white and black, color
cast and tone corrections, and then selective color corrections the Macbeth
Color Checker in some cases will not look good when it is reproduced but
the photo will.
In this situation, the Macbeth Color Checker or grayscale target is a good
guide and a tool that you are making available if the original photo proves
to be difficult to color correct. But it is not an absolute tool you can
count on to always get a good image reproduction of the photo that was
scanned with it. If you were thinking the Macbeth Color Checker would be
the test for assuring that you will always get good results because it will
reproduce well then you might want to reconsider doing this in this type of
workflow.
As for a workflow using profiles using the Macbeth Color Checker is not a
bad thing to do and would give you reasonable good feed back so you can
verify that your imaging system is working properly. But even in this
workflow if you decide to make a color correction to the photo the
correction will change the appearance of the Macbeth Color Checker.
I hope I understood your question.
Jim Rich