NEC SpectraView II Guia Del Usuario página 35

34 | NEC SPECTRAVIEW II - USER'S GUIDE
Show Average - shows the average JND per DDL value as a horizontal line on the graph.
Show Linear Fit - shows the best fit line between all the calculated JND per DDL values as a line on the graph.
Ideally this line should be horizontal, indicating equal steps in JDN per DDL along the display's grayscale.
Contrast Response
Max error - shows the highest percentage error deviation from the Barten Model curve, as well as the JND Index of
the highest error point.
Show Barten Model - shows the Barten Model curve on the graph. The Barten Model curve is calculated based on
the measured Intensity (white luminance) and black level values.
Show 10% Limits - shows two lines representing 10% error deviations from the Barten Model curve. Medical
displays used for Primary Class image viewing should be within the 10% deviation curves.
Show 20% Limits - shows two lines representing 20% error deviations from the Barten Model curve. Medical
displays used for Secondary Class image viewing should be within the 20% deviation curves.