Originally Posted by mark haflich
Buzz. For the readership, why don't you explain what the lightspace calibration package is and what is required to use it to calibrate a projector including what equipment one needs to keep in the chain after the calibrator leaves.
This is off topic for this particular sub forum but I'll respond. In a few months. I should have a Sony 500ES and will start a separate thread.
Three years ago I studied the use of Look UP Tables as a way of taming obstinate displays that would not calibrate properly utilizing the internal controls. At the time, the only possible way was to use one of the three professional software packages and a video processor capable of holding and processing LUTs such as the Davio
. The minimum investment was around $10,000. I set a goal to find a way to get LUT processing into home displays for a much more affordable price. Two and a half years ago I began working with Light Illusion (LightSpace) and a few months later we aligned with Entertainment Experience (the eeColor Processor). To make a very long story short, a calibration enthusiast version of LightSpace is now available for $724 at today's Pound/Dollar exchange rate and the eeBox for $700.
What's the big deal?
LightSpace (LS) has superior profiling math as a major differentiating quality factor vs its competitors in the consumer calibration business. One way to explain the math is by noting LS’s mathematical profiling dramatically increases the precision, range and speed of each color adjustment beyond anything the display in combination with any other calibration software package is capable of doing. Speed, Range and Precision are the cornerstones for accurate display adjustments in Home Cinema.
Range can be explained as LS ability to leverage the display’s oversaturated native gamut to mathematically fine tune the accuracy of the targeted gamut (e.g. rec709) … especially at the outside walls of the LUT. One could talk about “meat on the bone” here. The LUT walls are the extreme regions of color space which are most prone to error because this is where a display’s design limitations will be encountered.
Precision is a one-two combination of high speed (need a Klein K10-A colorimeter) hard reads (4,913 with a 17x17x17 display profile) and LS profiling math that takes into account the display’s design limitations in technology, gamma, color temperature, RGB separation and gamut when adjusting colors. The precision and accuracy of 4,913 hard reads when coupled with LS math will produce roughly 32,000 accurate color points for a display from which one can analyze and fine tune the display’s color accuracy.
When the eeColor Processor is added to the math, the precision is increased by LS to over 274,000 accurate color points. These 274,000 points will control the accuracy of 16.77 million colors for an 8 bit color depth display using interpolation. Even with the Lumagen Radiance processor which contains only 125 points (5x5x5, and now 9x9x9), LS uses over 32,000 color points of precision to adjust each color point of Radiance’s 125 color point LUT. The fact that LS is fast allows a professional calibrator to run a 4,913 point calibration with verification within an hour using a K10-A. I would go as far as claiming LS’s range and precision adjustments can produced near perfect shadow grays where shadow grays are really gray … not grays with slight blue or green or red discoloration. Note: Both THX and ISF classes teach the students to bump Blu Offset a couple of clicks as part of the post calibration workflow to get rid of green!
1) The inexpensive LS Home Cinema Light restricts the user to only one meter, the X-Rite iDispay 3, and two types of processors, the eeBox and the Lumagen Radiance series. The D3 meter slows down the read time, but even inputting a software read delay for Plasma technology Automatic Brightness Limiting, a 17 point profile can be produced in about four hours.
2) LED flat panel back lighting is sometimes colored. This is a problem in that it cannot be defeated. Poor design can be too much for even a LUT to handle.
3) The eeBox power can only be switched on and off by a switch on the Box, not the remote, and it will not pass the Blu-Ray frame packed 3D format.
4) I sell LS at a discount and also offer the eeBoxes for the lowest prices available so, yes, I am biased, but seeing is believing.
Procedures can be found in some threads I authored. Here's an example
. You will see that you need to know more than a little about calibrating before doing your own LUT work.
So far most of my sales have been to small studios all over the world for their own monitor calibrating but LUTs are catching on with enthusiasts. Sometime this week an inexpensive Blu-Ray disc will be available from one of the LS beta testers that will enable complete LS profiles to be accomplished via patterns from a BD player - no pattern generator required, and all automated.