Portrait Displays Upgrades Calman
The color-calibration software now includes support for the CIE 2015 2‑degree and 10‑degree color-matching functions.
Portrait Displays’ Calman now includes support for the CIE 2015 2‑degree and 10‑degree color-matching functions.
The new observers sit alongside Calman’s existing options — CIE 1931 2°, CIE 1964 10°, Judd–Vos, CIE 2006 (CIE 170‑1) 2° and Csuti–Schanda modified CMFs — giving color professionals direct access to the most recent CIE cone‑fundamental‑based observer model.
The CIE 1931 2° Standard Observer remains the formal basis of most video and cinema standards, but it was derived from a smaller sample size using broad‑spectrum primaries and small fields of view. Today’s OLED, QD‑OLED, QLED and MiniLED LCD displays and laser‑based projectors often use narrow‑band primaries and wide color gamuts where 1931‑based predictions can diverge from what viewers actually see. In practice, that means two displays can be perfectly matched in CIE 1931 xyY and still look noticeably different side by side because their spectral power distributions are not the same (a phenomenon known as metameric failure).
The CIE 2015 CMFs, defined in CIE 170‑2:2015 and derived from the CIE 2006 cone fundamentals, were developed to more closely reflect the spectral sensitivities of the human L, M, and S cones and to account for field size and age‑related changes in the eye. Adding these observers to Calman makes that newer CIE framework directly usable in daily calibration work such as perceptual matching across display technologies, evaluating color accuracy where narrow-band primaries and highly saturated colors stress the assumptions of older CMFs.
Because CMFs are wavelength‑dependent, the benefits of switching observer models are realized only when spectral data are available. In Calman, CIE 2015 observers are therefore intended for workflows that use spectroradiometers, which measure the full spectral power distribution and allow Calman to analyze that spectrum against different CMFs (1931, 1964, 2006, 2015, etc.).
CIE 2015 support is available in Calman v5.16.6.9 and on.
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