Abstract: An example method includes determining, by one or more processors, an estimated location of a wearable computing device on a display device that is not presence-sensitive, wherein the wearable computing device is configured to be worn on a wrist of a user; causing the display device to output, at the estimated location, a graphical pattern; determining, by the one or more processors and based on optical data generated by an optical sensor of the wearable computing device, a refined location of the wearable computing device; and utilizing, by the one or more processors, the refined location of the wearable computing device as a location of user input for an application outputting a graphical user interface via the display device.

Abstract: An example method includes determining, by one or more processors, an estimated location of a wearable computing device on a display device that is not presence-sensitive, wherein the wearable computing device is configured to be worn on a wrist of a user; causing the display device to output, at the estimated location, a graphical pattern; determining, by the one or more processors and based on optical data generated by an optical sensor of the wearable computing device, a refined location of the wearable computing device; and utilizing, by the one or more processors, the refined location of the wearable computing device as a location of user input for an application outputting a graphical user interface via the display device.

Abstract: A computing device is described that receives indications representative of a user input entered at a region of a presence-sensitive screen over a duration of time. The computing device may determine, based on the indications representative of the user input, a plurality of multi-dimensional heatmaps indicative of the user input. Based on the plurality of multi-dimensional heatmaps, the computing device may determine changes, over the duration of time, in a shape of the plurality of multi-dimensional heatmaps, and determine, responsive to the changes in the shape of the plurality of multi-dimensional heatmaps, a classification of the user input. The computing device may then perform an operation associated with the classification of the user input.