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3. Color Management

page 10

LaCie blue eye 2

User’s Manual

By taking into account the translation mechanisms contained in the ICC profile, another computer monitor (or any other
device, such as a printer, for example) can reproduce the exact same absolute colors even though its components, settings
and aging may be significantly different. The benefit is that both professionals see the same colors, and that there is no
color shift across the workflow.

3.2.1. Monitor Calibration

The calibration process allows the
professional to influence the range of
colors displayed. The main settings that
influence the range of colors displayed
are the following:

The 

Gamma Curve

. This curve determines

the characteristics of the absolute colors
associated with all the RGB values
between the white point and the black
point. It expresses the intensity of the light
emitted by each of the RGB dots for each
of the intermediary values between 0 and
255. The shape of the gamma curve in
particular determines the level of detail
and contrast that are displayed on the
monitor. A practical way of describing this curve is through the use of a numerical value that describes its slope.

The 

White Point

, i.e. the characteristics of the color displayed by the RGB value: R=255, G=255, B=255. These

characteristics are often summarized with the term White Point Temperature, because scientists have developed a model
where a given body brought to a certain temperature emits light of a given color. This temperature is expressed in degrees
Kelvin (°K). Common White Point Temperature settings in the pre-press workflow are 5000 K and 6500K. To influence
White Point Temperature, it is necessary to adjust the respective intensities (also called gains) of red, green and blue light
that are emitted by the RGB value of (255, 255,255).

The 

Luminance

controls the overall brightness of the monitor. 

With the LaCie blue eye 2, you can fine-tune all of these factors and target the Brightness, Gamma and White Point
Temperature settings of your choice. The sensor that is included is an advanced device that measures the light emitted by
your monitor and expresses it in absolute colorimetric terms. 

Содержание blue eye 2

Страница 1: ...per giving you the option to print the entire manual or just a specific page or section To Exit From the Menu bar at the top of your screen select File Quit Icons Used In This Manual Italicized paragr...

Страница 2: ...Monitor Calibration And Device Profiles 9 3 2 1 Monitor Calibration 10 3 2 2 Device Profiles 11 4 Installing The LaCie blue eye 2 12 4 1 Installing The LaCie blue eye 2 Software 12 4 1 1 Mac Users 12...

Страница 3: ...e by one or more of the following measures 1 Reorient or relocate the receiving antenna 2 Increase the separation between the equipment and the antenna 3 Connect the equipment into an outlet on a circ...

Страница 4: ...eil numerique de la classe B est conforme a la norme NMB 003 du Canada For European Users This product conforms to the requirements of EC Directives 73 23 EEC and 89 336 EEC Declaration of Conformity...

Страница 5: ...lue eye 2 are more accurate and help programs like Adobe PhotoShop display images properly Graphic professionals working in color managed environments will be able to adjust every monitor in their ima...

Страница 6: ...10 2 x or greater Power PC processor 128MB RAM 24 bit color display USB port Windows Users Windows 98SE Me 2000 or XP Intel Pentium III or higher compatible processor 128MB RAM 24 bit color display US...

Страница 7: ...management it is essential to properly calibrate and create custom individual profiles for all your monitors Once a monitor has been calibrated and a profile has been created the profile then communi...

Страница 8: ...t choices as to the components that are used in their monitors This leads to very strong differences between the color produced by any given RGB settings on separate monitors Besides the different com...

Страница 9: ...tomer site 3 2 Monitor Calibration And Device Profiles The LaCie blue eye 2 implements a convenient solution to these problems It entails two steps Step 1 The monitor is set to a calibrated state that...

Страница 10: ...ular determines the level of detail and contrast that are displayed on the monitor A practical way of describing this curve is through the use of a numerical value that describes its slope The White P...

Страница 11: ...values actually represent They relate device dependent RGB values to device independent CIELAB Yxy values They contain data to convert between the RGB value that each device produces and the CIELAB Yx...

Страница 12: ...on screen instructions to begin the installation process If you don t have administrator privileges click on the User Install button and if you have administrator privileges click on the Admin Instal...

Страница 13: ...t the USB end of the LaCie blue eye vision colorimeter to an available USB port on your computer Tech Note You may attach the LaCie blue eye vision colorimeter to powered USB hubs The LaCie blue eye v...

Страница 14: ...utility that is used at your computer s boot time this program will need to be deleted Setup your work area in the way that you will use it after calibrating and profiling Room lighting has an affect...

Страница 15: ...portion of the maximum luminance offered by the monitor Important Info Depending on the White Point Temperature target you choose the software may lead you to diminish the gain associated with one or...

Страница 16: ...ick Start 3 You will now slowly increase the Brightness control in your monitor s OSD a few increments at a time While you do this the colorimeter constantly measures the actual luminosity of the moni...

Страница 17: ...ite Point Adjustment by clicking on the Next button 1 Using your monitor s OSD set your monitor to its highest contrast value 2 Press Start 3 Using the OSD decrease your monitor s contrast value a few...

Страница 18: ...ature you will adjust the relative quantities of Red Green and Blue used by your monitor to create white To do this you will sequentially increase or decrease the R G and B gain settings of your monit...

Страница 19: ...e vision colorimeter should remain aligned on the measurement area at all times and no other window should appear on the monitor After completing Steps 1 2 3 and 4 the LaCie blue eye 2 program will fi...

Страница 20: ...ttings were Once you have chosen the profile s filename click on the Save Profile button In Mac OS X this file is stored in the Home Library ColorSync profile folder In Mac OS 9 x this file is stored...

Страница 21: ...lues for gamma white point temperature and luminance are displayed There should only be a small difference between your target values and those actually displayed Left Diagram Chromaticity Diagram The...

Страница 22: ...nformation By clicking on the Test Report button you will be directed to place the LaCie blue eye vision Colorimeter onto your monitor The blue eye 2 software will display a sampling of colors to dete...

Страница 23: ...ched If you still can t get your LaCie device to work properly contact us via the provided Web link Before contacting us make sure that you are in front of your computer and that you have the followin...

Страница 24: ...e com se contact LaCie United Kingdom Ireland Contact Us At http www lacie com uk support request LaCie Grand Export Contact Us At http www lacie com intl contact LaCie Belgium Contact Us At http www...

Страница 25: ...t no liability for any loss of data during the use of this device or for any of the problems caused as a result LaCie will not under any circumstances be liable for direct special or consequential dam...

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