SpaceMatch enables the VCGT colour management of any PC connected displays, avoiding the problematic issues associated with ICC Profiles.

Initial Operation

When first started SpaceMatch will read and display any active VCGT (Video Card Gamma Table) data, either previously loaded via SpaceMatch or via an ICC profile loaded through an ICC based colour management system.

If this is the first time SpaceMatch has been loaded and started on a given PC system and an active VCGT is displayed it is imperative that the ICC based colour management system that loaded the ICC profile is located and deactivated or uninstalled. Before progressing further make sure this is accomplished, and that every time the PC is re-booted no new ICC profile is loaded into the VCGT, as shown by starting SpaceMatch.

Note: If the already active LUT from a previous ICC profile might be required again use the Save button to save the VCGT LUT in the default SpaceMatch LUT format.

If multiple displays are in use make sure this is true for all displays by locating the SpaceMatch program window within each display in turn, and use the Read function to read the VCGT data for each display in turn.

SpaceMatch Menu
SpaceMatch Menu

When first started a single LUT display window is active within SpaceMatch, with the present active VCGT loaded. New LUT display windows can be opened with the New File button, or via the File/New LUT menu. The new LUT window will also read the presently active VCGT data from the display SpaceMatch is active on.

Assuming the LUT window shows no pre-active VCGT, as it should, the Load button can be used to navigate to the required VCGT LUT and load it into the SpaceMatch LUT window.

Note: ColourSpace is used to perform the display profiling, and generate the required calibration LUT, with SpaceMatch then applying the generated LUT to the display.

With the required LUT loaded into the SpaceMatch window, the Apply button will apply the LUT, making it active by loading it into the video card driving the display SpaceMatch is presently active on.

With multiple SpaceMatch windows open, as in the above image, each LUT can be loaded by using the Apply button within each SpaceMatch window.

At any time the LUT data held within the VCGT can be reset via the Reset Display Tables button.

Command Line Mode

To enable display calibration to remain active at all times SpaceMatch comes with a command line mode that can be used to setup a Task Schedule, or Startup operation, depending on the OS. This enables SpaceMatch to be automatically activated, and load a specific LUT as soon as the PC is powered-up.

Note: The use of the Command Line mode assumes a basic understanding of its use. If in doubt, please refer to a knowledgeable Windows user.

Command Line Operators

The available SpaceMatch DCM command line operators are:

  • spacematch help, or spacematch ? (to bring up the following info)
  • -l lut filename
  • -r reset lut
  • -d display number (optional, default 0)

Usage examples, using the suggested default location and to load a LUT called lut.txt to display 1, would be:

  • C:\SpaceMatch\spacematch.exe -l lut.txt -d 1

Such a command can be run as a shortcut, or within Task Scheduler, set to run At Startup, or At Log on, etc.

SpaceMatch Windows Task
SpaceMatch Windows Task

Note: Make sure all associated Task configurations are correctly set as required, such as any necessary delay to allow the PC to finish booting before the LUT load is attempted, etc.

Remove All Other ICC Colour Management Programs

If any alternative colour management programs have been installed, including the activation of Window's own Colour Management tools, they must be deactivated as many will attempt to re-activate their own management without warning.

It is therefore best to uninstall all competing colour management software to prevent any conflicts.

For Windows Colour Management use the following instructions to disable its operation:

  • Go to Control Panel, Colour Management
  • Start with the Devices tab
  • Remove all Profiles associated with any display device
  • Go to Advanced tab, Change System Defaults
  • Again, Start with the Devices tab
  • Remove all Profiles associated
  • Go to Advanced tab
  • Un-tick the box Use Windows display calibration
  • Close everything