f f1 | Measure Number of elements | Description Total number of all UI components | Cues 124 | GUI Type Web, Mobile, Embedded | Dimension Visual complexity |
f f2 | Measure Alignment | Description Arrangement of components on the UI | Cues 17 | GUI Type Web, Mobile, Embedded | Dimension Structural |
f f3 | Measure Density | Description Ratio of total area covered by the UI components to the entire screen | Cues 86 | GUI Type Web, Mobile, Embedded | Dimension Visual complexity |
f f4 | Measure Element connectedness | Description Closeness of UI components in layout | Cues 54 | GUI Type Web, Mobile, Embedded | Dimension Perception |
f f5 | Measure Common region | Description Clearness of the gap between groups of components | Cues 23 | GUI Type Web, Mobile, Embedded | Dimension Perception |
f f6 | Measure Grouping | Description Number of objects that are distinguishable | Cues 243 | GUI Type Web, Mobile, Embedded | Dimension Visual complexity |
f f7 | Measure Sequence | Description Organization of components for easy perception | Cues 15 | GUI Type Embedded, Mobile | Dimension Structural |
f f8 | Measure Cohesion | Description Equality level of UI components’ aspect ratio with the display’s AR | Cues 41 | GUI Type Embedded | Dimension Visual complexity |
f f9 | Measure Size | Description The size of UI component | Cues 8 | GUI Type Web, Mobile, Embedded | Dimension Perception |
f f10 | Measure Balance | Description Layout smoothness of UI components | Cues 87 | GUI Type Web, Mobile, Embedded | Dimension Perception |
f f11 | Measure Equilibrium | Description Degree of overlap of the center of all components with the display’s center | Cues 25 | GUI Type Embedded | Dimension Structural |
f f12 | Measure Symmetry | Description Degree of uniform placement of UI components on an axis | Cues 26 | GUI Type Embedded | Dimension Structural |
f f13 | Measure Colour variety | Description The amount of displayed colours | Cues 124 | GUI Type Web, Mobile, Embedded | Dimension Visual complexity |
f f14 | Measure Clusters of colour | Description The number of clusters of RGB values | Cues 17 | GUI Type Web, Mobile, Embedded | Dimension Visual complexity |
f f15 | Measure Entropy | Description Shannon’s information entropy of UI image | Cues 86 | GUI Type Web, Mobile, Embedded | Dimension Visual complexity |
f f16 | Measure Luminance | Description Standard deviation of pixel luminance values | Cues 54 | GUI Type Web, Mobile, Embedded | Dimension Perception |
f f17 | Measure Figure-ground contrast | Description Separation of UI components from the background | Cues 23 | GUI Type Web, Mobile, Embedded | Dimension Perception |
f f18 | Measure White space | Description Ratio of the area without any UI element to the entire UI area | Cues 243 | GUI Type Web, Mobile, Embedded | Dimension Perception |