compering colors

  • Thread starter Thread starter moshebg
  • Start date Start date
M

moshebg

i scaned in 2 different scanners the same photo
now

i want to compare between the 2 scanners the percents color of each
scan
4 example: 2 compare the percents of red in each scan
in what program i can do it & how
thenks
 
moshebg said:
i scaned in 2 different scanners the same photo
now

i want to compare between the 2 scanners the percents color of
each
scan
4 example: 2 compare the percents of red in each scan
in what program i can do it & how
thenks
Click to expand...

Don't understand what you are trying to accomplish. Maybe you could
rephrase the question?

Bart
 
moshebg said:
i scaned in 2 different scanners the same photo
now

i want to compare between the 2 scanners the percents color of each
scan
4 example: 2 compare the percents of red in each scan
in what program i can do it & how
thenks
Click to expand...

In Photoshop full or elements, with the eyedropper tool, you can read the
color values on the image, then compare the numbers.

I mean read them and see what they are. Simple addition and subtraction will
tell you the difference.

The eyedropper returns the values of color in Red, Green and Blue.
 
Bart van der Wolf said:
Don't understand what you are trying to accomplish. Maybe you could
rephrase the question?
Click to expand...

He wants to compare the color values in two files that are the same photo
scanned on two different scanners.
 
Peter D said:
He wants to compare the color values in two files that are the same photo
scanned on two different scanners.
Click to expand...
Scan with each scanner, save as TIFF with different filenames. Tiff because
no compression and jpeg artifacts.

Elements 2.0 or Photoshop CS will open multiple files. They will put each
file in its own window.

Example using Photoshop Elements 2.0:
Open first file, open second file, both will be in Photoshop Elements at the
same time, Click on Window, click or check Info. Select Eyedropper. Put the
eyedropper in the first window, read and write down the RGB values on a
piece of paper. click on the second window, read the RGB values write on the
paper, compare the two values for red.

Or for that matter, slide the windows side by side and look at the images
and see with the eye the difference.

I can almost guarantee that the two scans will be different.
Different scanner different conditions, different software.
The trick is choose the scanner that produces the most pleasing scan to your
eyes.

Scanning a photograph, is a copy of the original, no electronic or
mechanical device can reproduce a perfect copy. And no two different
machines will produce the same results.
 
I can almost guarantee that the two scans will be different.
Different scanner different conditions, different software.
Click to expand...

Indeed! Even using the *same* scanner, the *same* software and lowest
resolution (e.g. 50 on a flatbed), the scans *will* still be
different!

I did exactly that way back when I started scanning and it was quite
an eye opener. (It put into perspective my attempts at "perfection".)

Therefore, such a test to compare scanners may not really be very
useful.

Don.
 
Back
Top