Vivitek HK2288 4K UHD Home Theater Projector Review - Advanced Calibration

February 27, 2018

/ By Art Feierman

Vivitek HK2288 Projector Review – Advanced Calibration: CMS Calibration, Calibration Charts

CMS Settings for Best (dark room) calibration – Night Mode

BT.709 color gamut showed red, magenta and blue over saturated.  Using the projectors CMS (color management control) did help reduce their 100% saturation points but the lower in-between levels (i.e 80% 60% 40% 20%) levels are over saturated and could not be corrected with calibration. This issue seems rather common with other recent DLP projectors I have calibrated from Optoma & Benq.

[sam_pro id=1_56 codes="true"]

RGBCMYHueSaturationGain
Red11097110
Green709895
Blue10097100
Cyan717992
Magenta14792147
Yellow6097112
Vivitek HK2288 Night Mode Post-Calibration DeltaE 2000 (target below error of 3)
Vivitek HK2288 Night Mode Post-Calibration DeltaE 2000 (target below error of 3)

Delta E is a metric for understanding how the human eye perceives color difference. The term delta comes from mathematics, meaning change in a variable or function. The suffix E references the German word Empfindung, which broadly means sensation. Simply put, look at Delta E as a measure of grayscale/color accuracy. 3 and under is considered 'Excellent' and imperceptible by the human eye.

CMS Settings for Brightest calibration – Day Mode (boost lamp)

RGBCMYHueSaturationGain
Red10898100
Green7510195
Blue10010193
Cyan888288
Magenta1229895
Yellow71100100

Color gamut seemed to fair better in Day mode. It seems running the lamp in boost mode has a benefit beyond a brighter image by helping improve the color gamut performance. After calibration, nearly all of the mid saturation levels (i.e 80% 60% 40% 20%) are far more accurate.

Vivitek HK2288 Day Mode Post-Calibration DeltaE 2000 (target below error of 3)
Vivitek HK2288 Day Mode Post-Calibration DeltaE 2000 (target below error of 3)

[sam_pro id=1_54 codes="true"]

CMS Settings for 4K HDR – HDR Mode

[sam_pro id=1_65 codes="true"]

Note: These are the default values of my projector when viewing HDR (user mode). Yours may be a little different. I recommenced you leave yours at their default value.

RGBCMYHueSaturationGain
Red105100100
Green100100100
Blue100100100
Cyan14791100
Magenta12092100
Yellow105100100

While in HDR mode all of the colors in CMS were pre-calibrated from the factory, along with color set to 75 & tint set to 47, which I found a little odd. Measuring/calibrating BT.709 color gamut while in HDR mode was very difficult to do. I used an HDR workflow that allows me to measure a BT.709 color gamut within a BT.2020 container. Problem was no matter what options I tried with my calibration software some of the colors, especially magenta measured and looked way off. However, the colors in my SMPTE color bars test pattern looked good as did real-world content from my UHD blu-rays. So, I decided it was best to leave all 6 colors in CMS and color/tint alone.

Vivitek HK2288 HDR Mode (user) Post-Calibration DeltaE 2000 (target below error of 3)
Vivitek HK2288 HDR Mode Post-Calibration DeltaE 2000 (target below error of 3)

[sam_pro id=1_36 codes="true"]

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