Your ISF Calibrator just left your home.  You were so excited about the improvements he made that you really didn't listen when he explained the calibration report to you.  What do you do?  Call and ask him to go over it again?  Here is a basic overview for one type of calibration report.  There are many different types of calibration software, and most of let the calibrator customize their reports.  So while this report may not look like the one you have in front of you, it will give you an idea of what you are looking at on yours.  Here is another example of what a TweakTV calibration report might look like.   This is what you will receive from one of our professional calibrators after they complete your job.

RED data chart:

The first column is labeled IRE (Institute of Radio Engineers) and represents the grayscale, 10 IRE, being 10% above black and 100 IRE, being 100% peak white.

The second and third columns labeled x and y are the actual post calibrated measured co-ordinates.  Our target point is D65 (x = .313 and y = .329) and we want to get as close to this for the full Grayscale (10 IRE - 100 IRE) as possible.

The fourth column is labeled Y fl (Luminance in Foot Lamberts) this is a measurement of reflective light in a square foot area.  At 100 IRE or % is the peak light output.

The fifth column labeled Kelvin is the Correlated Color Temp (CCT).  If we calibrate to D65 then we should have a CCT of 6500 Kelvins, +/- 100 to 300 Kelvins.

A note on D65 vs. 6500 Kelvin, we calibrate to D65 not 6500 Kelvins.  You can be at a CCT of 6500 Kelvin but not be at D65.  Think of it this way, you are in your car in your home town and want to get to a certain address.  6500 Kevins is the town, while D65 is the address and you use the x and y coordinates for directions.

The sixth column labeled Delta C is the relative errors in color measurements. As an ISF Calibrator we try to obtain the lowest error possible.  

The seventh column labeled Measured Gamma (Gamma is a measurement of how the image brightness changes with the input signal level.)  Typically our target gamma is 2.2 to 2.4.

Green data chart:

The first line is the display's Average Color Temp or CCT.  This is arrived at by averaging the measurements from 10 IRE to 100 IRE.

The second line is the display's Average Gamma.  This is arrived at by averaging the measurements from 10 IRE to 100 IRE.

The third line is the displays Average Delta C.  This is arrived at by averaging the measurements from 10 IRE to 100 IRE.

Blue data chart:

The first column labeled HDTV 709 displays the 6 colors in the HDTV REC 709 color space plus the white target of D65.  (Red, Green and Blue are Primary colors and Yellow, Cyan and Magenta are Secondary colors.)

The second column labeled x and y gives the reference x and y co-ordinate for each color on the HDTV REC 709 color space plus D65.

The third column labeled Meas x and Meas y gives you the display's measured x and y co-ordinates after calibration for each color on the HDTV REC 709 color space plus D65.

Magenta Data Graph:

This graph is labeled Grayscale and plots the displays pre and post calibrated Grayscale tracking for the CCT of 6500 Kelvin.  At the bottom and from the left to the right you see that the grayscale is laid out 10 - 100 IRE in 10 step increments.  On the left side from bottom to top are the different Kelvin temps with 6500 Kelvins being the reference.  This is the same information you see in the RED chart, column 2 and 3 just in a graph form.

The red dotted lines represent the pre Grayscale tracking.

The Thicker solid line represents the post Grayscale tracking.

The thinner solid line with the X at each IRE represents the reference target point.

Cyan Data Graph:

This graph is labeled Grayscale Color Error and plots out the displays pre and post calibrated Grayscale Color Error.  At the bottom and from the left to the right you see that the grayscale is laid out 10 - 100 IRE in 10 step increments. On the left side from bottom to top is the Delta C Error.  This is the same information you see in the RED chart, column 6 just in a graph form.

Yellow Data Graph:

This graph is labeled Gamma Error and plots out the displays pre and post calibrated Gamma Error.  At the bottom and from the left to the right you see that the grayscale is laid out 10 - 100 IRE in 10 step increments. On the left side from bottom to top is the Luminance.  This is the same information you see in the RED chart, column 7 just in a graph form.

Orange Data Graph:

This graph is labeled Color System HDTV - REC 709 and plots out the displays pre and post calibrated HDTV Color Space.  On the bottom from left to right lays out the co-ordinate points on the X axis.  On the left side from bottom to top lays out the co-ordinate points on the y axis.  The circles represent the reference point for each Primary and Secondary Color and are color coordinated.  The solid color coordinated dot represents the Primary and Secondary measured color point post calibration.  The X represents the Primary and Secondary color point pre calibration, the bigger white circle represents the D65 target and the smaller is the post calibrated white point.  This is the same information you see in the Blue chart, column 1, 2 and 3 just in a graph form.

Brown Data Graph:

This graph is labeled RGB vs. IRE and plots out the displays pre and post calibrated RGB Color Error.  At the bottom and from the left to the right you see that the grayscale is laid out 10 - 100 IRE in 10 step increments.  On the left side from bottom to top is the percentage of each color.  The idea is to have a flat line for each color RGB and be at 100%.  This is the same information you see in the RED chart, column 6 just in a graph form.  It separates each primary color needed to make up your Grayscale at different IRE levels so you can see the error for each color. 

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