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

Posted on 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

Night Mode Pre-Calibration CIE 1976 Saturation Sweeps (target BT.709)

Night Mode Post-Calibration CIE 1976 Saturation Sweeps (target BT.709)

❮ ❯

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.

RGBCMY	Hue	Saturation	Gain
Red	110	97	110
Green	70	98	95
Blue	100	97	100
Cyan	71	79	92
Magenta	147	92	147
Yellow	60	97	112

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)

Day Mode Pre-Calibration CIE 1976 Saturation Sweeps (target BT.709)

Day Mode Post-Calibration CIE 1976 Saturation Sweeps (target BT.709)

❮ ❯

RGBCMY	Hue	Saturation	Gain
Red	108	98	100
Green	75	101	95
Blue	100	101	93
Cyan	88	82	88
Magenta	122	98	95
Yellow	71	100	100

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)

CMS Settings for 4K HDR – HDR Mode

HDR Mode Pre-Calibration CIE 1976 Saturation Sweeps (target BT.709)

HDR Mode Post-Calibration CIE 1976 Saturation Sweeps (target BT.709)

❮ ❯

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.

RGBCMY	Hue	Saturation	Gain
Red	105	100	100
Green	100	100	100
Blue	100	100	100
Cyan	147	91	100
Magenta	120	92	100
Yellow	105	100	100

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)

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

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

Night Mode Pre-Calibration CIE 1976 Saturation Sweeps (target BT.709)

Night Mode Post-Calibration CIE 1976 Saturation Sweeps (target BT.709)

❮ ❯

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.

RGBCMY	Hue	Saturation	Gain
Red	110	97	110
Green	70	98	95
Blue	100	97	100
Cyan	71	79	92
Magenta	147	92	147
Yellow	60	97	112

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)

Day Mode Pre-Calibration CIE 1976 Saturation Sweeps (target BT.709)

Day Mode Post-Calibration CIE 1976 Saturation Sweeps (target BT.709)

❮ ❯

RGBCMY	Hue	Saturation	Gain
Red	108	98	100
Green	75	101	95
Blue	100	101	93
Cyan	88	82	88
Magenta	122	98	95
Yellow	71	100	100

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.

CMS Settings for 4K HDR – HDR Mode

HDR Mode Pre-Calibration CIE 1976 Saturation Sweeps (target BT.709)

HDR Mode Post-Calibration CIE 1976 Saturation Sweeps (target BT.709)

❮ ❯

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.

RGBCMY	Hue	Saturation	Gain
Red	105	100	100
Green	100	100	100
Blue	100	100	100
Cyan	147	91	100
Magenta	120	92	100
Yellow	105	100	100

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.