Here goes first attempt on coming up with a process to do HDR on the Epson. Feedback / corrections most welcome.
- Using Firmware 1.11 and HCFR 184.108.40.206
(Note: as per Zoyd in post 484
, RGBdE bars, NB/NW/satshift/lum graphs, and CIE diagram tooltip data have not been checked or updated for HDR) with internal patterns chromecasted (HCFR: Measures -> Generator -> Configure -> Display -> CCAST)
- Use Natural colour mode or colour mode of your choice (for my env I can get 160 nits for Natural and 70 for Digital Cinema, so you have to make the call of more specular highlights vs WCG)
- Reset chosen mode to defaults (Epson: Menu -> Image)
- Turn Iris off (Epson: Menu -> Image)
- Set Power Consumption to High (Epson: Menu -> Image), medium can be used also but at the sacrifice of nits which are important for the "HDR" affect but then less fan noise.
- Set projector Colour Space to BT.2020 and Dynamic Range to HDR Mode 2 (This was HDR Mode 1 pre 1.11 firmware) (Epson: Menu -> Signal -> Advanced)
- Turn on superwhite (Epson: Menu -> Image -> Advanced). Note, this is optional, jwhn can get the tone mapping curve to match in his setup without it and just using gamma controls, but I couldn't in my setup. For guidance as to use it or not, jwhn gets around 100nits max with his setup and I get around 160nits max.
- Unlike SDR, no need to change Brightness and Contrast (TBC)
- Set HCFR to 20 point (HCFR: Measures -> Parameters -> Number of grayscale levels)
- Set HCFR Colour Space to “UHDTV - Rec2020/P3” (HCFR: Advanced -> Preferences -> References)
- Set HCFR to SMPTE 2084 HDR (HCFR: Advanced -> Preferences -> References)
- Do 21 point grayscale sweep (HCFR: F2)
- Dial in using 30% and 80% points using continuous measure (HCFR: F8) and adjusting Red and Blue offset
for 30% and Red and Blue gain
for 80% so as to get a dE of 2 or lower, though lower than 1 should be easily achievable (Epson: Menu -> Image -> Colour Temp -> Customised).
- Note: 30% and 80% are typically used but you may get better results finding the best balance between 10/20/30 and 80/90/100.
- Note: There is a noticeable skew at the lower end (0 to 30%) on these Epson projectors. Some have attempted to reduce that skew using Colour Uniformity. See post 455
- May take a few attempts as offset and gain affect each other
- Enable tone mapping in HCFR by checking "BT.2390 Tone Mapping" and "Override Targets" (HCFR: Advanced -> Preferences -> References)
- Set "Diffuse White[nits]" to what you personally would like, one school of thought is set it to what you use for 100% for SDR movies eg somewhere between 20 or 40 nits, note the higher you go the less room you leave for specular highlights
- Set “Target MaxL” to your 100% measure from the grayscale run
- Set “Master MaxL” and “Content MaxL” to 1000 or 4000 depending on what majority of your content is or even do two separate calibrations
- View Luminance graph. Grey dashed line is the target, yellow solid line is measured from grayscale sweep.
- Using continuous measure (HCFR: F8) adjust using customized gamma controls C1 to C9 (Epson: Menu -> Image -> Advanced -> Gamma -> Customized)
- Note: If can't get the curve to match by maxing the gamma controls then turn on superwhite and start over (Epson: Menu -> Image -> Advanced)
- Note: If can't get the curve to match by maxing the gamma controls then use Contrast (Epson: Menu -> Image)
- <Need to add more tips here as this is a black art!>
- Do a grayscale run after changes
- In HCFR, in the Information window, change the dropdown from "Comments" to "CIE Chart"
- In HCFR, change view to "Primaries and Secondaries", select white and run continuous measure so we get a reading for 50% white aka Diffuse White (HCFR: F8)
- Change view to “Red Saturation Scale", select 50% saturation and run continuous measure (HCFR: F8)
- Using Epson CMS (Epson: Menu -> Image -> Advanced -> RGBCMY -> R) dial in 50% saturation by using Hue (rotates the point around the center) and Saturation (moves it in and out from the center) so the yellow dot is in the second red box from the center of the chart.
- The third dimension, Brightness, cannot be done from the CIE Chart so adjust the CMS Brightness so "delta luminance" in the "Saturation colour" window is as close to 0% as possible for 50% saturation.
- Note, after adjusting brightness you may need to re-adjust CMS Hue and Saturation. This may take several attempts.
- Repeat for 50% Green, Blue, Cyan, Magenta, Yellow
- Run saturation sweep for all Primaries and Secondaries (HCFR: Measures -> Saturations -> Primary and Secondary colours)
- From the saturation sweep, 0%-25%-50%-75% saturations all should have a DE of less than 2. 100% saturations typically have a much higher DE as this projector, especially not having the cinema filter engaged, cant get the wider colour gamut. Green is the worst offender.
- Check Grayscale, Tone Mapping and CMS again as adjustment to one can impact others
- Run a Full Tilt Boogie (HCFR: Measures -> Full Tilt Boogie)
- Save the HCFR chc file for future reference
- Turn Iris On (Epson: Menu -> Image) (TBC)
- Set projector Colour Space to Auto (Epson: Menu -> Signal -> Advanced)
- Set projector Dynamic Range to Auto if used HDR Mode 2 or Auto Bright if used HDR Mode 1 (Epson: Menu -> Signal -> Advanced)
- Set Image Preset to personal taste. Natural mode default is 1. Personally I prefer 4.
- Save to memory!