FSI XM650U Calibration Overview
The FSI XM650U is a 64.5-inch professional WOLED reference monitor from Flanders Scientific designed for color-critical monitoring of 4K, UHD, and HD signals. It features a native UHD resolution of 3840x2160, providing detailed and accurate image representation. The monitor supports 12-bit video processing, allowing for enhanced color accuracy and smoother gradients.
The FSI XM650U is a popular choice for color suites as a larger sized reference display.
Below is an overview of the display's performance before and
after professional FSI XM650U calibration.
A 3D LUT calibration was done as the FSI XM650U has internal LUT storage.
Equipment, software and target used in the calibration:
- Calibration software: DCM
- Colorimeter: K-10-A
- Spectro: CR-300
- Patch generator: DaVinci Resolve, SDI out
- Calibration target: Rec 709 D65 G2.4 115 nits (SDR)
Native Gamut
This is the native gamut (before calibration) of the FSI XM650U compared to the Rec 709 color space calibration target. The native gamut fully covers the target color space, making it ideal for color critical application after accurate display calibration .
White Point
This is a close-up of the native white point (before calibration) compared to the calibration target of D65. It is off target with a red tint. The display has bias/gain CMS controls to manually adjust lower/upper Greyscale, if desired.
RGB Balance
This is the Greyscale RGB balance before calibration, dominance of the red channel is evident causing red contamination in neutral colors.
EOTF: Gamma
This is the native gamma and luminance response of the FSI XM650U. The reference line is configured for the calibration target G2.4. In its native state, the display is excessively bright, proper calibration is absolutely needed to correct this.
Spectrum Analysis
This is the spectrum of the FSI XM650U in native gamut for full white, with the red, green and blue primaries spectral output overlaid to identify color channel issues. The R, G, B color channels do not closely track the W channel (B channel performs best), this is a consequence of WOLED display technology.
Calibration
After display preparation and configuration, a large display profile is run to create a detailed characterization of the display. From that profile data, a 3D LUT is then generated by DCT and uploaded into the display.
Gamut & White Point (post)
Gamut (post calibration) compared to the Rec 709 D65 target - both color space and white point are on target.
RGB Balance (post)
This is the Greyscale RGB balance post-calibration, an excellent improvement.
EOTF: Gamma (post)
This is the gamma and luminance response of the FSI XM650U after calibration compared to the reference calibration target G2.4. A huge improvement, the display tracks the reference much closer.
Color Error: delta E 2000 (post)
These are the dE 2000 stats post calibration for a 237 point validation profile consisting of lum ramps, memory colors and skin tones. With an average dE 2000 color error of only 0.56, the FSI XM650U now performs very well given that the JND (just noticeable difference) for human vision is set at a dE 2000 value of 2.3.
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