In another example, we created a painting application (Figure
6), where two users can paint with their own selected
color. For example, User A can select red and paint in red,
Figure 7. Example – sketching application. Each user
has a different drawing color to attribute edits. An
“undo” button is provided, allowing users to undo
strokes from their personal edit history.
Figure 6. Example painting application. Two users
can select colors from a palette on the left of screen.
The system records each user’s selection, allowing
users to paint in a personalized color.
while User B can select blue and paint in blue without affecting
User A’s selection. This could be trivially extended
to brush type, thickness, opacity, and similar features. In a
general sense, Capacitive Fingerprinting ought to allow
users to operate on the touch interface with personalized
properties [25]. Further, because applications identify the
owner of each stroke, it is possible to support individualized
undo stacks – a feature we built into a simple sketching
application (Figure 7).