Re: Art Duplication
Re: Art Duplication
- Subject: Re: Art Duplication
- From: Louis Dina <email@hidden>
- Date: Thu, 17 Sep 2015 12:42:25 -0500
Thanks for all the great feedback folks. It's a challenge to be sure.
Most of my problem seems to be in setting the white and black points so my
image is a good match. I'm happy with the color, but not the tonal range.
What works almost perfectly for the Color Checker doesn't cut it with the
painting. I'm thinking the CC patches approach a perfect, diffuse
reflection, so it looks the same almost regardless of the angle and
lighting. The paintings have a lot of direct reflection, shine, sheen,
texture, etc, so the viewing angle and lighting make a big difference in
how they look. I was hoping my cross polarized lighting would solve it. It
did to a significant degree, but not completely.
I'm trying to learn myself, but also trying to help a friend who took
dozens of art photos with a similar setup. Unfortunately, the actual
artwork is 1000 miles away, so he can't tweak to match visually. I was
trying to use a "by the numbers" approach as much as possible, to reduce
his reliance on memory or feel to adjust his images.
John, you may be right that I didn't have my polarizers perfectly cross
polarized. Also, my custom profile was made without the polarizers.
Wayne, I think your comment colorimetric reproduction on a monitor is part
of the issue.
Roger, yes I have taken outdoor shots, with and without a polarizing
filter. I got much better results with the polarizer. Still have the same
black point issue.
Ben…Yikes! I think you are right, but that's more than I am willing to
tackle. I wouldn't be surprised if my light gray studio walls are causing
light to reflect back causing flare, even with the polarizers. I'm going to
try another test using a back backdrop to reduce extraneous light.
All this good feedback is much appreciated!!
Lou
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