PatchTool Compare Stats
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The "Stats" tab of a Compare window. The main graph of the above screenshot is a histogram of the differences between reference data and measurements made on a monitor, with Display Check, with 1617 samples which correspond to a standard IT8.7/4 target. Please note that the stats tab can analyze the differences between two measurements files in the same manner. The currently selected Delta parameter is DeltaE* computed with the CIEDE2000 color difference formula; the statistics can also be performed using the Cyan, Magenta, Yellow, K, R, G, B, x, y, X, Y, Z, L*, a*, b*, C*, h*, or H* Delta parameter. The reference here is a file defined by IDEAlliance for the SWOP2006 Coated3 color space; this file, and many others, are provided with PatchTool. The Cumulative Relative Frequency (CRF), shown in the purple curve, is the sum of all the bin values; the CRF graph corresponds to the Max error data group values. The 95th percentile is used as a “GO/NO-GO” threshold in many protocols, including the IDEAlliance proofing programs for presses and monitors. Because the measurements were done with one of the files prescribed by IDEAlliance, a certification report can be obtained by clicking on the "Cert. report" button (click here for an example of a monitor certification report that was converted to a PDF format). For more information, please consult our tutorials on IDEAlliance certification. |
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