Originally Posted by brandon_k_w
I placed the colorimeter 6ft away so as not to cast a shadow on the screen, and angled slightly upwards to hit the center of the screen. This thing did a great job of removing the bluish tint, and there is more depth in the color too when comparing the i1 Profiler sample images.
The people in the images look more three dimensional, I wasnt expecting that. And the greyscale is more accurate... I had no idea my greyscale was off until I compared the before and afters.
Now I will have to learn HCFR that way I can adjust the colors directly on my projector and have color accuracy on all sources rather than just on my PC.
Hi, i1Profiler is useful only if you are using your PC as a source, having a PC monitor or a TV or a projector to view content.
i1Profiler can direct connect with your PC Monitor RGB Balance controls (when this is possible, or asks you to do this manually and guides you what adjustment you need to take to do an initial White Calibration (usually monitors have 1-point of RGB balance controls for that). (It can't connect to do this with TV's or Projectors)
Later it will start automatic measurements to auto-adjust the Grayscale/Gamma by adjusting the output of the video signal that it goes to the connected display (VCGT). It will measure some colors also and it will generate an ICC file. To fully take advantage of the ICC correction (Gamut Correction) you need an application that can read ICC correction, software like PhotoShop (only from inside PhotoShop preview window you will be able to see Gamut Colors Correction.)
To your windows or other applications that is not supporting ICC, it will correct the VCGT (Video Card Gamma Table) only, this means RGB Balance (Grayscale) and Gamma, your Gamut is not corrected by VCGT.
When you have a display/projector and you want to calibrate for playback from a stand-alone player, you will calibrate using manual adjustments of your display/projector available calibration controls, so initially you will need to start by setting Sharpness/Contrast/Brightness and then move to measurements with calibration software and you meter.
You will start using the Movie Mode (which is the best performing mode from all the other movies that each TV/Projector is coming), disable enhancements, and measure the Warm 1/2 with Grayscale patterns to see which has better RGB Balance and it's closer to D65 (The White Point that REC.709 colorspace is using).
After that measure the available Gamma Options (0,-1,-2,-3) to see which one is closer to your target gamma, recheck again contrast/brightness and then move to Grayscale calibration.
If you display/projector has 2-Point and 10/20 Point RGB Balance, then start with 2-Point and use 100% White patch to calibrate using the RGB-Gains (RGB-High) controls and then with 30% with RGB Cuts (RGB-Low) controls, recheck always both and contrast/brightness again, after that move to 10/20-Point RGB balance for further adjustments.
After the end of Grayscale calibration you will move to Color Gamut adjustments (if you display has that kind of controls, for Full CMS adjustments).
There free calibration software solutions, you can download:
1) HCFR from here
with support forum topic: HCFR - Open source projector and display calibration software
2) The Free DPS version of LightSpace CMS
can be used also with an i1Display PRO meter, there available to read various guides
on the Light Illusion website.
The specific guide for use with LightSpace DPS is here
But there is a lot of potentially useful/interesting info in the various guides on the website also.
Support forum topic: Free LightSpace DPS - Manual Display Calibration
For improve your calibration knowledge, here are some useful links generally for calibration:
Video Calibration From The Inside - Volume I - 2nd Edition-1
About the patch generation, there disk/media files solutions, just find one that is bit-perfect for the calibration software you will use. Ideally to playback these patterns from the device you will use for movie playback (to have your full video chain calibrated). You will need patterns designed/encoded for SDR.
There software patch generation or hardware controlled by software generators via applications (FireStick/TV, ChromeCast, AppleTV, mobile phones etc.), its fine to use them (to save some time from manually displaying 10/20-Point grayscale and 6 patterns for CMS, which is not super time-saving from performing this manually since its more accurate) but you need to test if the measurements you have from these solutions is matching the measurements you have from your actual playback source you will use for patch generation.
You can see some deviation example here: http://01900888.com/forum/139-di...l#post56253694
There is a complete thread with comparison of low cost solutions and their errors there: http://01900888.com/forum/139-d...cy-thread.html
Using untested software patch generation solutions, while it can save some time and be easier from the user as procedure, its like having a calibrated display in 'virtual world'). The most of the users have skipped to verify if their patterns are accurate and they are happy from their results looking good looking charts with low dE numbers.
I have posted more details about what to look and about how to test here: http://01900888.com/forum/139-di...l#post56121138
The ideal meter placement is when the meter is matching the same angle you have from your sitting position eye's height towards to the center of the screen.
You can use a mobile phone or a digital angle meter to find the angle. Imagine a virtual line (you can use a laser pointer) from your eye's @ sitting position aiming the center of the screen, the meter ideally has to placed the that line height and angle.
About the meter distance, its related with what meter you are using and how narrow optics it has, if you use Window patterns you need to find out the meter's FOV (field of view) from the distance you will place the meter.. because we don't need the meter to see larger area from the pattern area. (not see the meter shadow if you place it very close to the screen)
See that PDF about meters FOV (your meter has the same FOV as C6/i1DisplayPRO): SpectraCAL - Why Viewing Angle is Important
To take measurement from seating position you need a meter with a very narrow FOV (for example JETI which has 1.8 degree).
Here you can see how it's performed a projector calibration in post production, from siting position and eye level height: