Monitor Calibration 3D LUT Files for Video and Image Editing Software

CalMAN video calibration software can now create a monitor calibration 3D LUT file that can be imported into many video and image editing software systems. CalMAN creates an optimized 3D LUT file that applies calibration correction to the monitor to correct its performance to very accurately comply with a desired video standard (e.g. BT.709, sRGB, Digital Cinema P3, etc.). CalMAN currently creates the following LUT file formats: .clt, .csv, .cube, .mga, .m3d, .3dl, .itx, .dat, .txt, and .EE.

Display Calibration 3D LUT Files for Video and Image Editing Software

When a monitor calibration LUT is imported into an editing software program, the program’s output signal is then altered, according to the LUT data, to produce an image on the display that complies with the selected video standard. Programs that are compatible with the LUT file formats that CalMAN currently produces include:

 

CalMAN Software 3D LUT Setup

Follow this procedure to produce a monitor calibration 3D LUT file with CalMAN and load that file into a number of video and image editing software programs.

Open CalMAN Color Cube Workflow

The Color Cube workflow in CalMAN version 5.1 or later is used to create monitor calibration 3D cube LUTs. In the CalMAN main menu, select Open Workflow Template / Color Cube (3D LUT).

1.  Initial Setup

In the Initial Setup section of the Color Cube workflow, step through the following pages:

 

Color Cube workflow navigation

 

      a.  Meter Connect

Connect your color meter to the CalMAN computer. Then, on the Meter Connect page, click the Find Meter button. On the Find Meters dialog, select your meter, if it is listed, then click Search. If your meter is not listed on the dialog, just click Search.

      b.  Source Connect

Connect your test pattern generator to the CalMAN computer. Then, on the Source Connect page, click the Find Source button. On the Source dialog, under Manufacturer, select the manufacturer of your test pattern source. Under Model, select the model of your test pattern source.

      c.  LUT Device Setup

On the LUT Device Setup page, click the Find Processor/Display button. Since you want to generate a LUT to a standalone file, rather than within a hardware LUT processor, you will use the SpectraCal Cube Generator software 3D LUT generator device. On the Display dialog, under Manufacturer, select SpectraCal. Under Model, select SpectraCal – Cube Generator (3D LUT).

LUT Device Setup

2.  Pre-Characterization

In the Pre-Characterization section of the Color Cube workflow, on the Test/Document Display and Check Linearity pages, you can measure the performance of a monitor before you calibrate it. On the Display Performance Test page, the previous monitor measurements are evaluated in a series of pass/fail performance parameters.

If the monitor fails in any of these parameters, you should consider using the following Optimize Display workflow section to optimize adjustments on the monitor itself.

If the monitor passes all of these parameters, you can skip the Optimize Display section and go immediately to the LUT Calibration workflow section.

3.  Optimize Display

In the Optimize Display section of the Color Cube workflow, you are guided to optimize monitor settings for picture mode, color gamut, color temp, gamma, dynamic range, white point balance, and white point luminance.

4.  LUT Calibration

In the LUT Calibration section of the Color Cube workflow, there are provisions for calibrating both a 1D LUT (Calibrate RGB Balance page) and a 3D LUT (Calibrate 3D Cube LUT page). When we are using the CalMAN Cube Generator function to produce a 3D LUT file, we will skip the 1D LUT page and use only the Calibrate 3D Cube LUT page.

      a.  Calibrate RGB Balance

Skip over this page when using the CalMAN Cube Generator function to produce a 3D LUT file.

      b.  Calibrate 3D Cube LUT

On the Calibrate 3D Cube LUT page, click the AutoCal (circling arrows) button at the right end of the meter action buttons. The following AutoCal Setup dialog then appears:

Calibrate 3D Cube LUT

Select your Output Cube Size and File Format according to the requirements of the video or image editing system you are targeting. Information for a number of editing systems follows below. Select your file path for some convenient location.

5.  Post-Characterization

In the Post-Characterization section of the Color Cube workflow, you can test the performance of the monitor to verify the accuracy of the 3D calibration LUT. You can switch back to the Test/Document Display to compare to the pre-calibration performance.

Import CalMAN LUT File into your Imaging Software

Following are selections for the LUT file size and format that are required for different popular graphics software, plus information on how to import and load the LUT file within each different software program. However, be careful to not burn the monitor calibration LUT into the footage, or the footage will look correct only on that display.

Don't see the software LUT format you need? Email your request here

Required CalMAN Software Version:

  • Version 5.1.0.1130 or later

Required CalMAN Workflow:

  • Color Cube (3D LUT) workflow