User guide > Integral quantities > The list of integral quantities

The list of integral quantities looks like this:

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Plese see the technical reference of the SCOUT manual for a description of the general handling of lists like this.

As usual, you create items, i.e. rows, by selecting the desired item type in the drop down box (labeled in the situation above with 'Color coordinate L*') and then press the '+' button.

The columns of the list have the following meanings:

Value

This is the actual, computed value of the integral quantity.

Type

Here the type of the quantity is indicated. There are several color coordinates that can be computed, and various other quantities of technical interest.

Spectrum

The name of the spectrum that is refered to when the integral quantity is computed. Certain types of integral quantities require spectral data in well-defined spectral ranges. The spectrum should cover the used spectral range completely. The usual interpolation and extrapolation is performed if the spectral data points in the spectrum do not match the points necessary for the computation of the integral quantity.

To select the spectrum you have to press the F4 function key. This lets you cycle through all entries of the spectrum list. Stop when you have reached the appropriate spectrum. By pressing the F5 function key you can move backwards in the spectrum list.

Sim/Exp

After the wanted spectrum is selected you can choose between the simulated spectrum and the experimental one for the computation of the integral quantity. Although usually you may be interested in the values for the simulated spectra only, there might be situations where you want to know the corresponding values for the experimental data also.

You toggle between the simulated and measured spectrum by pressing the F4 or F5 function key.

Optimize

This value can be switched between the states 'Off' and 'On'. If the setting is 'Off' nothing happens. If one of the entries is set to 'On' then WCD switches its fitting strategy: Whereas usually the goal is to decrease the deviation between simulated and measured data now the integral quantity is optimized with respect to its target value (see below). The fit deviation now is the sum of the squared differences between the 'value' and the 'target value' of those integral quantities that have their optimize column entry set to 'On'. Each square difference is multiplied by its individual weight (see below).

You can toggle between 'Off' and 'On' by pressing the F4 or F5 function key.

Target value

Here you set the target value for the fitting of the integral quantities.

Weight

Here you specify the weight that multiplies the squared difference between the value and the target value of the integral quantity.

Special menu commands:

Edit

This command activates a sequence of dialogs which can be used to modify the properties of integral quantities:

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Here you can change the text used to identify the integral quantity in views etc., i.e. the name of the object. Instead of the long name 'a* / D65 / 2° (T, Simulation)' you could simply call this quantity 'a*'. If you leave the nickname blank the original default name will be used.

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If you want to display the value of the integral unit together with a unit, you can enter the unit text in this dialog.

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Use this dialog to set a scaling factor for the value of the integral quantity. If you want to display, for example, an averaged reflectance value (scaled between 0 and 1) in %, you should enter a scaling factor of 100 here. In addition, you should also use a proper unit (like % in this case) to indicate the scaling of the value.

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This dialog sets the number of decimals used to display the computed value.

The sequence of dialogs shown above will appear for every integral quantity. Some objects require more selections. In this case, additional dialogs will show up and allow the user to make choices. The individual dialogs are discussed below.

Tables

Use this command to create tables of quantities such as the applied color-matching functions or the spectral distributions of the various illuminants. The table values are written to the workbook which opens automatically.