When viewing sequence data in the gallery you have some different UI-elements and interactions that differ from the single-frame gallery.

The gallery is an object centric sequence gallery, so each gallery item consists of all frames where a specific object is labeled. The lifetime of the object is not restricted to just one sensor, but every sensor is taken into account.

Filters are based on frames, so the result of a filter will show one gallery item for each object which has at least one frame that matches the filter. This frame is also the one shown by default in the thumbnail.

One powerful filter that is only available for sequence data is the "... [property change]" filter! This allow you to find objects where a property has changed value from one frame to another.

Sorting options are sometimes referring to the values over the objects entire lifetime and sometimes referring to what you could call meta traits of the object.

A few examples:

The charts in the Metrics-tab are object-frame centric. The data used when creating the charts are therefore all frames for all objects. This means that Object A with 24 frames will be represented 24 times in the data, while Object B with 3 frames will only be represented 3 times in the data. Depending on the nature of the object and the property you are looking at, the different values can be the same for each frame (example: if the "width" doesn't change there can be 24 data points for "width=3.14 meters" for Object A and 3 data points for "width=1.23 meters" for Object B) or the different values can differ from each-other (example: if the "distance to object" changes constantly the 24 data points for Object A can be spread out between e.g. 9.2 and 12.4 meters and the 3 data points for Object B can be spread out between e.g. 2.4 and 2.7 meters).

When creating a filter by interacting with the charts your filter will hit all objects which has at least one frame matching the filter, just like filters created in the filter section.



In the gallery control bar you can change what chart property should be displayed. Depending on the type of property the chart will look different. When no chart property is selected you will see a white bar indicating the lifetime of the object (fig. 1). When a categorical property is selected the previously white bar will get different colors depending on the property value in the different frames (like in fig. 2, where we have selected "status" of a pedestrian, which has the possible values "standing" or "walking"). When a numerical property is selected you will instead see a line chart showing how the value changes during the objects lifetime (like in fig. 3, where we are looking at the change in volume for an object).

By hovering over the image from left to right you can change which frame is being displayed.

When hovering over the chart you will see a tooltip (fig. 3). The tooltip shows information about the object in the frame you are hovering. The info is the frame id, the sequential frame number, and the value of your currently selected chart property.

When hovering over the chart you can right click to open the currently shown frame in the task view.