Preferensi

Jendela preferensi mengijinkan Anda mengendalikan:

  • A device profile.
  • Gamma, kecerahan, dan kontras.

4.1. Preferensi Dasar

Figure 2Tab dasar Manajer Warna GNOME

To alter a profile for a device.

  1. Select the device.
  2. Select the required profile from the list in the color profile drop down box.

If the required profile is not in the list then

  1. Select "Other profile..."
  2. Find the ICC profile file using the GNOME Open File dialog presented.
  3. Press the Open button on the dialog.

If the profile is invalid then the profile selected for the device will not alter. Messages may be shown.

4.2. Preferensi Lanjut

Figure 3Tab lanjut Manajer Warna GNOME

This allows you to adjust a calibrated device or generated profile.

The Fine Tuning Option is only available if you configure GConf to enable it ( apps ▸ gnome-color-manager ▸ show-fine-tuning).

CRT monitors have native gamma around 2.4 - 2.5 and LCD monitors usually emulate the same value.

Traditionally, Linux and MS Windows operating systems use image encoding of 1/2.2 and do not apply any gamma adjustment to the image or video card LUT. Therefore the overall gamma is expected to be around 1.1 (which is useful to allow for dim viewing conditions at home environment).

Apple used to use image encoding gamma close to 1/1.8 to naturally match the native gamma of printing devices (and therefore internally applied gamma adjustment of 1/1.45 before displaying images on monitor so that the images displayed correctly).

Nonetheless, since OS X (v10.6 Snow Leopard) the default image encoding gamma has also the value of 1/2.2 to meet the requirements of consumer imaging industry.

Before fine tuning the gamma in GNOME Color Manager, you should know what your monitor native gamma is, what display gamma you want to reach and then do the math yourself.

4.3. Profile viewer

Figure 4GNOME Color Manager profiles tab

This allows you to view details about installed profiles.

4.4. Calibration and profiling

GNOME Color Manager can generate ICC profiles with supported color measuring instruments.

Figure 5 The first stage is calibration, which takes a few minutes.
Figure 6 The final stage is profiling (characterization), which can take over 15 minutes.

When calibrating and profiling a display you may have to change the color measuring instrument to operate in different modes. You may have to remove your instrument from the screen to change the modes. Ensure the instrument is put back on the screen after you have changed any settings.

Figure 7GNOME Color Manager Instrument Configure Dialog

When calibrating and profiling a display connected using a VGA or DVI connection, often the type of device is not known. By answering correctly, GNOME Color Manager can generate better profiles for the device you are trying to calibrate and profile.

Figure 8GNOME Color Manager Screen Type Dialog

When profiling a printer you can also generate images to be sent to a print shop or photograph processing agency. The profiling details will be saved, and you will need to select the correct profiling results when you receive the proofs back.

Figure 9GNOME Color Manager Print Mode Dialog