GretagMacbeth Spectroeye - Graphical Representation of Measurement Results

To Next Page

To Previous Page

SpectroEye™ 41

2 • Use

2.4.1.4 Graphic representation of measurement results

The graphic representation may be very useful to correctly

interpret the measurement results. To change between numerical

and graphical display you can use the Graphical/Numerical

icons on the symbol bar. The SpectroEye may represent both

absolute values and differences in graphical mode.

For the CIELAB function the various graphic representation

possibilities are as follows:

• Graphic representation of absolute measurement values

In numerical mode, using the absolute difference icon, first

select the absolute representation, then switch to graphic

representation using the Graphical/Numerical icon.

The graphical representation of CIELAB values shows the

CIELAB system with the green-red axis (a), the yellow-blue

axis (b) and a saturation ring with unit 100. The (x) mark inside

the representation shows the position of the measured value.

The third dimension of the CIELAB system, i.e. the brightness,

is the represented by the vertical bar on the right side of

display. The brightness value can be read according to the

length of the black bar.

• Graphic representation of the color difference between

reference and sample

Using the Absolute/Difference icon, select the Difference

option for the sample.

The cross mark (x) indicates the position of the reference

item, while the line indicates the direction where the sample

diverges from the reference itself. The length of the line is

always the same i.e. it does not represent a distance between

the measurement values. In the brightness display, the

brightness of the reference is represented by the thick black

bar. If the sample is lighter than the reference, this is repre-

sented by a thinner line above the thicker one (see the top

figure). If the sample is darker than the reference, a thin light

line is shown inside the thicker black line (see the bottom

figure). This line also will always have the same length,

so it can only be used to detect the direction.

○○○○○○○○○○○○○○○○○○○○○○○○