Thursday, June 30, 2011

What are you actually viewing?

In Photoshop CS4/5, do you know exactly what are actually viewed when soft proofing is checked or unchecked and with soft Proof set to Windows sRGB or Monitor.


                       sRGB          ProPhoto
Data Info          (Lab=38,13,14) (Lab=38,14,14)
 (CS5)                115,82,68      82,68,55

Following RGB values
were read with color picker
Soft Proof OFF *      119,90,75       121,90,75  CM
Soft Proof: sRGB *    119,90,75       89,77,63  MCM
Soft Proof: Monitor **115,82,67       82,68,54  NCM

PatchTool Display profile
set to Monitor profile
a) RelCol (BPC) *     121,90,74      121,90,74  Illu=D65
b) Absolute *         119,88,72      119,88,72  Illu=D65
c) RelCol (BPC) *     121,90,74      121,90,74  Illu=D50
d) Absolute *         126,87,60      126,87,60  Illu=D50


* These RGB values were directly read from screen with an color picker and they are monitor profile dependent.
** NCM not affected by monitor profile.

CM : Embedded icc profile tag is honored, monitor profile is applied.
MCM: Monitor profile is applied, however, embedded icc profile tag is ignored.
NCM: No Color Management. The pixel RGB values were sent to monitor.

ColorPic  is a free color picker and it can be downloaded from here.

Saturday, January 1, 2011

Evaluating Printer Profile Gray Tone Reproduction Capability

Soft Proofing with 256 Level Gray Tone Test Chart


Reference Data