- This topic has 33 replies, 5 voices, and was last updated 4 years, 9 months ago by
.
-
Posts
-
First of all thank you Florian for creating the DisplayCal software!
I was wondering if somebody could share the best way to calibrate the SmallHD 502 monitor? I’ve had a look at the settings and I’m not quite sure which option to choose? Should it be default 2.2 gamma or a video 3D LUT with D65 whitepoint and REC709?
Have anybody successfully calibrated a SmallHD monitor?
Thanks in advance!
Hi,
start from the video 3D LUT for Resolve Rec709 preset, then set cube resolution on the 3D LUT tab to 33x33x33. The rest of the workflow is basically identical to the one in the Wiki.
Hi,
The calibration sequence for 502 is as follows.
1)Enter the setting page.
2)Enter the calibration menu.
3)Default lut is applied at the time of shipment by SmallHD.
4)Erase default lut.
Overwrite in null lut instead of default lut to erase.
Null lut is made in davinchi resoluve ,or it’s being
picked up from the internet.
Write null lut in a SD card.
Insert a SD card in smallhd502.
Designate a SD card by the calibration menu and
apply null lut.
When applying it, choose rec709,6500k from pop up menu.
3D lut inside smallHD502 becomes clean by
the above mentioned way.
It’ll be done cleanly even that calibration lut
isn’t checked by the calibration menu.
But an appearance adjustment can’t be done any more.
So the way to remove a check can’t be recommended.
Correct calibration becomes possible to do the above .
6)Use displaycal.
7)When applying calibration lut made with oneself, there are two ways.
Apply in calibration menu, or lut menu in page OS.
There is a little problem.
When applying it by the calibration menu, I can think an offset hangs a little.
When being interested, it’s better to apply it to page OS.
But when applying it to Page os, camera lut can’t be applied any more.
You should make lut which combined calibration lut and camera lut and
apply it to page os to settle this.
Best regards.
I forgot to say one.SmallHD502 becomes serious hot like a plasma display monitor.A probe(i1Pro2,i1DP)wakes temperature drift up certainly during measurement.(my experience :temp drift 200-400k)
So a probe doesn’t make a screen touch. If i1DP is used, separate 14 cm from a screen.
When I measured SmallHD502, it was a result in the following.
Gamma:2.4
Colorspace:Rec709:99% DCI-P3:90%below
Wide than Rec709,below DCI-P3.It was an incomplete gammat.
Thank you so much for your reply! I’m not sure I understand the “null LUT” thing you’re mentioning. Why can’t I just delete the calibration settings and make the calibration LUT based on that?
Null lut is no change lut. If it’s compared by the shape of cube, it’s a perfect square.
The shape of cube at shipment lut is unclear . Something is being changed.(offset ? gain?) A calibration signal is changed by shipment lut.
Cal signal×shipment lut＝probe measurement.
So,displaycal calibration lut ×shipment lut=correct calibration .
But,when apply displaycal lut in calibration menu,It’ll be the operation which replaces displaycal lut with shipment lut. I’d like to make Ax B,but only A is left.So correct calibration isn’t obtained.So it’s necessary to exchange null lut with shipment lut.
Before calibration:Output＝
Input × shipment lut × appearance adjustment × page OS lut
After calibration:Output＝
Input × displaycal lut × appearance adjustment × page OS
This is bad.
True calibration:Output＝
Input × shipment lut × appearance adjustment × displaycal lut × page OS lut
I still don’t get it – I think it’s a little too technical for me ?
Anyway, I went ahead and profiled it (without creating a null LUT) and it looks to be very precise and matches my grading monitor surprisingly well!Congratulations！ I think your smallHD502 is probably about 90 percent fitness. When doing calibration including null lut, it becomes better.By the way what does a monitor use?
Is there anyway to check how precise the calibration is? It measured 99.7% REC709, but not sure if that says anything about the precision?
Do you have Toul where gamma and Δ E can be inspected? Like calman, LightSpacezCMS and i1profiler. Even if the color area cover rate is near 100%, the right color may not be output.
