The "Preferences" dialog allows to set user preferences and system options and is organized along several pages which can be selected by clicking the corresponding tab sheet:
|Default Color Palette
||The default color array used to display color images. If you select the option "user-defined palette" you have to specify this palette. Click the button to select your favorite palette (if you did specify any user-defined palette, use the palette editor to create one).
|Color Scale Range
||Defines the default color scale range in percentiles. Setting this parameter to a value of, for example, 3 results in a default color scale ranging from the 3-percentile to the 97-percentile. A higher percentile increases the contrast of the image.
|Color of the Confidence Band
||Controls the color used to display confidence bands in mean spectra. You can select a color from the drop down list. In order to define a new color (different to the currently available colors in the list) you have to click the color indicator of the currently selected color. This will display the color dialog which allows to define a new color.
|Default Mask Color
||Specifies the default color used to display masked areas in an image. You can select a color from the drop down list. In order to define a new color (different to the currently available colors in the list) you have to click the color indicator of the currently selected color. This will display the color dialog which allows to define a new color.
|Color of the Non-Data Region
||When zooming out of an image or when panning an image non-data regions will become visible. This color defines the color these regions.
|Suppression of Duplicate Marks
||In some situations (e.g. when regressing layers or when displaying PCA scores) image data are plotted using small marks. In the case of larger images this may result in many unnecessary marks on top of each other. This parameter specifies the minimum distance (in pixels) required for two marks to be drawn as separate items. If the distance of two marks is below this threshold, only one of them will be displayed. Activating the suppression of duplicate marks will speed up some displays up to a factor of 10 - but it will create small visual artefacts you should be aware of.
|Enforce Pixel Aspect Ratio
||If this option is active ImageLab displays all images in a way that the pixels have a specific aspect ratio. The aspect ratio can be defined in the control right to the checkbox. Hint: while this option to set the aspect ratio (or turn it off at all) might be helpful in certain cases, we generally recommend to enforce an aspect ratio of 1.0.
|Image Stack Default Settings
||This option allows you to predefine the default blending weight and the blending mode used by the image stack. Hint: Some supplied user-defined color palettes (e.g. all "mask_white_*" color palettes) work best when the blending weight is set to 100% and the blending mode is set to "multiply", while other palettes work better with a blending weight of 40% and mixing instead of multiplying.
|Frame Interval of Video Timer
This controls the playback speed of the videos in the 2D Imager. By default the time/depth video timer is set to a longer interval, because the time/depth dimension is usually less than the layer (spectral) dimension.