LightSpace CMS can be used with the (now obsolete) eeColor LUT Box for accurate 3D LUT based calibration for HDMI input displays.
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With 65^3 LUTs the eeColor can provide highly accurate display calibration for professional and Home Cinema use.
Load 3D LUTs into LUT-box to adjust the color look for any source signal with simultaneous outputs to HDMI and SDI monitors from a single LUT-box. CalMAN takes advantage of the SpectraCal ColorBox (also eeColor) processor. Device Driver Pack, available for download on the SpectraCal website.
Initial Operation
Before starting calibration work ensure the eeColor box is transparent when no calibration LUTs are loaded, and that there is not change in black/white levels.
With some signal configurations the black level can be lifted, and/or the peak white level reduced - this is due to incorrect EDID data communication between the signal source, the eeColor LUT box and display.
If errors are seen the 1D output LUTs within the eeColor can be used to re-scale the image path signal, as described below.
Replace the default eeColor 3D LUTs
The default LUTs that come pre-installed within the eeColor LUT Box are of no particular use for calibration purposes, so should be replaced with Light Illusion default LUTs.
To download the example Light Illusion LUTs use the downloads page. These LightSpace CMS LUTs prove the operation of the box, as well as replacing the on-screen LUT description icons with meaningful ones for calibration use.
The example Light Illusion LUTs have the following effect.
Replacing the 1D LUTs
The eeColor, for reasons best know to itself, has an output path that includes a first 1D LUT, followed by a 3x3 matrix, followed by a second 1D LUT. The first 1D LUT undoes a default 2.2 gamma, while the second 1D LUT reapplies the 2.2 gamma. It is a good idea to replace the 1D LUTs with Null versions, to avoid any potential issues.
Overcoming Scaling issues
If the Black/White levels are incorrect, due to EDID issues or similar, new 1D LUTs can be generated via the LUT Manipulation tools, or through use of the LUT Image for external LUT manipulation, and uploaded into the eeColor LUT box.
The Output 1D LUTs will be replaced with the re-scaling LUTs.
Uploading Calibration LUTs
When using the eeColor LUT box for calibration you will need to upload the 3D calibration LUTs generated via LightSpace CMS using eeColor's own control software, and the following procedure.
Note: The correct 3D LUT format is 65^3. The 64^3 is just for checking LUTs made with other systems that purport to be eeColor compatible.
eeColor LUT Box 3D LUT VideoScale
Depending on the display and source in use (data range, or TV level) the eeColor LUT Box may require LUTs in a particular data range.
For TV Levels, after the calibration LUT has been generated via LightSpace CMS in the normal way, use the 'Edit/LUT Manipulation/VideoScale' functions to format the LUT data as required, with video scale data within a data range LUT. See VideoScale for more information.
For data range display workflows the re-scale will not be needed.
Additional Technical & Support Info.
German language version of this page:displaycalibration.de
And at the end you have a suffix with 2 slow clock cycles. The suffix is really different, with 6 clock clocks but also a fast clock group in between. There are 3 major sections: For the cheap clone, the spacing is huge: The set of signals below that is a slightly zoomed in version of the one above.
Access Denied
If we ignore for a second that the cheap clone doesn’t work on this particular board, the biggest consequence of the chapeau clone is that bulk transfers are much slower: All processing is done with a simply state machine.
For this investigation, it doesn’t matter what gets transported when, but it’s almost certain that the slow clock cycles are used to move the JTAG TAP from iDLE state to the scan Teeasic or scan IR state, and that the fast clock groups are used to rapidly scan data in and out of a scan data register.
As Glaster wrote earlierthe biggest issue with the cheap clone is that it doesn’t work on my eeColor Color3 board. We have a prefix with 8 slow clocks, but in between the second and the third slow clock, there’s a signal teasic clock group. But the cheap clone runs TCK at exactly double the speed of the Terasic, and both devices only use a flimsy, cheap flat cable. About Us Contact Hackaday.
The suffix is really different, with 6 clock clocks but also a fast clock group in between.
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There are 3 major sections: For the cheap clone, the spacing is huge: The cheap clone was never able to get reliable contact. I was supposed to work on getting the SiI up and runningbut UPS delivered a nice package today: My money is on the clock teradic Sign up Already a member? The Terasic doesn’t have that problem: What remains is the question about why the cheap clone doesn’t work.
It looks like the cheap clone is able to squeeze out bits blastter fast, but there’s quite a bit of software overhead in processing the next byte in the USB blastdr. A really interesting difference is in the spacing between fast clock groups: When you zoom in on the slow clock cycles, you can measure a TCK frequency of kHz: In the middle there are 16 groups with fast clock cycles each group is itself 8 clock cycles.
Terasic vs Cheap Clone USB Blaster
This is the first transaction that travels over the JTAG cable when you issue the “nios2-terminal” command. I was supposed to work on getting the SiI up and runningbut UPS delivered a nice package today:.
A fast clock group sets the clock at 12MHz instead of 6MHz. Yes, delete it Cancel. We see a similar pattern, but interestingly enough, it’s not the same.
For the overview, look at the upper set. In the middle we have the expected 16 fast clock groups. And at the end you have a suffix with 2 slow clock cycles.
Terasic vs Cheap Clone USB Blaster | Details |
The most important signal here is TCK, in yellow. In addition, there are roughly 3 idle cycles between a fast clock group.
Zooming in on the slow clocks, we see a clock frequency of kHz. It’s blasteer that it’s broken: And here’s the equivalent of the cheap clone.
Terasic – Turnkey Solutions – Achievements – Altera USB Blaster Download Cable
It may be that 12MHz usv really just pushing things too much. The set of signals below that is a slightly zoomed in version of the one above.
While the Terasic was rock solid in its communication with the Color3 board. Meanwhile, during a fast clock group, the clock toggles at 6MHz.
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