Hi,

I've been doing some measurements on my InFocus X10 and this is what I achieved after some work.

BUT I think something is not right here, look at the CIE green primary and saturations, it bends to the right, is that even possible? What am I doing wrong here?

I use PC (Vista) and ATI HD3870 as source for all material, I've been testing all the settings in the PJ and the gfx regarding colour space to no avail.

Please help!

Best regards L.


http://drlove.dyndns.org/temp/kali/1/CIE1.jpg

http://drlove.dyndns.org/temp/kali/1/RGB.jpg

http://drlove.dyndns.org/temp/kali/1/Gamma.jpg

http://drlove.dyndns.org/temp/kali/1/Luminance.jpg

http://drlove.dyndns.org/temp/kali/1/Temp.jpg

Greetings

Just means the gamut on the projector is less than 709 ...

May also have to do with the probe you are using. A spectro device is more trust worthy ...

regards

I have no experience with your particular device, but I can confirm that most, perhaps all, of the CIE diagrams I have seen for the Samsung LCD model I own show similar bending in the saturation chart, but for magenta rather than green.

One of the tricks on the Samsung to make the calibration better behaved is to use the 75% stimulation patterns rather than the 100% stimulation patterns. At least on my set, there is less bending in the saturation diagram at 75% stimulation; the really noticeable twist in magenta seems to happen when pushing the set from 75% stimulation to 100%. On my set, I see slight differences between 75% stim and 100% on the other colors, as well, but it really stands out on the chart on only the one color.

What I've heard the X10 is 709, D65 calibrated color wheel and so on.

I'll try the method w/ 75% stimulation.

I realized this evening that I was a little cryptic in my note this morning, as I did not describe what I see on my Samsung, to clarify my suggestion. When I calibrate using the 75% stimulus patterns, what I see is that the 100% saturation, 75% stimulus point shows up about in line with the 25%/50%/75% saturation points (100% stim) points. So the hope is that all the points end up close to the target positions. The assumption, then, which seems plausible, is that the visual twist is something that is happening only at 100% stimulus 100% saturated magenta, for as yet unexplained reasons.

Perhaps you will see similar behavior, and you can decide that the set is calibrated as well as can be achieved, and relegate the 100% stimulus green to an extreme point that is seldom reached in real material. Or perhaps you will see different behavior, and that will itself be interesting. One ends up with a little bit of an apples and oranges comparison, comparing 75% stimulus/100% saturation to 100% stimulus / 25%/50%/75% saturation points, but even so it is a reasonable sample to describe the multidimensional behavior of the set.

BUT I think something is not right here, look at the CIE green primary and saturations, it bends to the right, is that even possible?That looks about right to me based on what the guys at cine4home.de measured for an InFocus IN83. I think InFocus lets more of the light at wavelengths between red and green through the system by the way they set their colorwheel segments, so that they can get more lumens for white.

If you go to www.cine4home.de and search down about halfway to the review on the IN83, then go about halfway down in that review to the CIE charts, you will see a green pulled toward red.

--Darin

What I've heard the X10 is 709, D65 calibrated color wheel and so on.

I'll try the method w/ 75% stimulation.

And how many TVs that claim "709, D65 calibrated color wheel and so on" hit all those specs out of the box (or actually have correct color coordinates at all?). Can you name 5? 10?

Ohh, exactly as mine.
If you look at the EDID data that the PJ sends to the PC the PJ says that "his" coordinates for primary RGB(xy) is almost exactly as the measured primarys. Can I change the EDID to 709 spec maybe?

Ohh, exactly as mine.
If you look at the EDID data that the PJ sends to the PC the PJ says that "his" coordinates for primary RGB(xy) is almost exactly as the measured primarys. Can I change the EDID to 709 spec maybe?

Get a professional calibration from someone familar with the set and right equipment to do it.

I have no idea what the set is or is not capable of.