ICC profilers comparison using same UCR black

ICC profilers comparison using same UCR black generation curve

ICC profilers comparison using same UCR black generation curve The (PCRI) “Pictorial Color Reference Images” from the CMS Lab of the Gravure departement of RIT Institute, are used to demonstrate how three ICC profilers, using the same UCR black generation curve, reproduce the original color reference images. Thoses images are available at: http://www.rit.edu/~gravure/CMS2007/test_images.html#pcri • The reference images are in RGB color space, using the “sRGB IEC61966-2.1” ICC profile.

• The CMYK reference used to create the three ICC profiles is the latest “GRACoL 7 2006 Coated 1” characterization dataset available on the GRACoL web site at www.gracol.org.

• The Black generation used to generate the three ICC profiles is as follow: —Max Ink coverage = 320 —Max Black = 95% —Black Start = 25-30% —Black generation type = UCR* (No automatic Black generation have been used) *Each ICC profiler uses different terms or settings to set the black generation curve. Several tests have been made to insure a consistency between the three ICC profiles generated for this comparison. A grayscale image, showing a gradient from white to black has been used to insure that the ICC profiles creates the same UCR black generation curve.

• The conversions have been made with Photoshop CS2™ v. 9.0.2 • The Relative Colorimetric intent, with Black Point Compensation have been used for the CMYK conversions.

• The latest available version of the profilers have been used to create the ICC profiles. One of the three profiler is PerfX Color management Pro™ v.3.7.6 from TGLC inc.

The ICC comparison shows the “composite CMYK”; “CMY channels” and the “Black channel” side by side.

This comparison wants to show what is “under the Black” channel and how each profilers generates the CMYK separations.

Try to evaluate which row (each ICC profiler) makes the best CMYK separation for high-end printing color reproduction! You are the judge.

CMYK Composite Image Reference No. 1

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 2

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 3

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 4

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 5

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 6

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 7

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 8

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 9

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 10

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 11

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 12

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 13

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 14

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 15

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 16

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 17

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 18

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 19

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Image Reference No. 20

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite Color References

XMP

sRGB Original Image PFX

GPM

CMY channels

Black channel

CMYK Composite GrayScale Reference

XMP

GrayScale Original Image PFX

GPM

CMY channels

Black channel