Originally Posted by bishopt
I just wish they came with full saturation panels that would allow you to dial in your saturation levels better...
Spears and Munsil, the AVS HD disk, HCFR self-generated test patterns if using an HTPC (some drawbacks with this), and the one provided by Tom Huffman all have some additional patterns.
Beyond the calibration for dummies guide, there are several posts by other experts such as Tom Huffman that go into much more detail on how to acheive a perfect calibration.
Saturation is a tricky thing because it has a relationship with Chroma which isn't "reversibly related or inverse", even if it can seem proportional to our eyes.
Chroma can in a sense make a color look SLIGHTLY more saturated to our eyes even when the saturation did NOT change just because the brightness/lightness of the color has changed, but overall the saturation of a color is independant from Chroma. Now let's say your gray scale was off as well as your saturation, and then you adjusted saturation of just RED, as the RED becomes less saturated any error in grayscale would start altering the color even more as the saturation of RED is reduced and the color is becoming closer to white (a color with all saturation turned off just becomes another b&w gray scale, so that is how gray scale affects saturation in a sense, but it gets complicated). That is why you do GRAY-SCALE first, and saturation and hue last. So this stuff gets kind of "heady" and is somewhat pushing the limitations of my current calibration knowledge (I'm still learning some things), as I did some odd experiments and got varying results that didn't always make sense between different CMS's on different projectors. There are a few things I am still trying to understand better.
I learned how to do it from this article:http://www.avsforum.com/avs-vb/showthread.php?t=852536
Here is one snippet from one of Tom Huffman's threads which helps understand how to adjust things further:
Note: There is no industry-wide accepted terminology for gray scale controls. You may see RGB Contrast/Brightness, RGB Gain/Bias, RGB Gain/Offset, RGB Drives/Cuts. They all mean the same thing. Contrast, Gains, and Drives are for adjusting the bright end of the gray scale. Brightness, Biases, Offsets, and Cuts are for adjusting the dark end of the gray scale.
Adjusting Color using a Color Management System (CMS)
Point your colorimeter towards the screen and display a white test pattern, and then take a reading.
Display a red test pattern AT THE LEVEL OF STIMULUS AS THE WHITE TEST PATTERN, and then take another reading.
Repeat the previous step until you have measured all of the primary and secondary colors.
Use the software controls to plot the Lightness, Saturation, and Hue of all of the colors.
Adjust these values for each of the colors, one by one, using the CMS until Lightness, Saturation, and Hue line up as close as possible to the references for your target gamut (see those references above). It is helpful if the software has a continuous reading mode so your changes can be viewed in real time.
Note 1: You probably won't be able to get all colors lined up perfectly, but get them as close as you can.
Note 2: Some software only plots changes that are visible on the CIE chart. This allows you to get saturation and hue right, but it doesn't tell you how your changes affect the brightness of the colors. Unfortunately, some CMSs automatically change the brightness of a color as you adjust its saturation. This will give you a good looking CIE chart, but you could actually end up with LESS accurate color than when you began.
Note3: The human eye is not equally sensitive to all colors and all color differences. For example, it is more important to get red and green right than blue. It is also more important to get correct hues than correct saturation.
END TOM HUFFMAN's POST
I learned from Tom Huffman's posts throughout the forum. There are different ways of adjusting saturation on the Mits, depending on how far you want to go with it and if you are shooting for the less than 2% error that our eyes can then no longer see. You can start with using a white test pattern than going back to a Red test pattern.