  The application of data visualization in public art attracts increasing
attention. In this paper, we present the design and implementation of a
visualization method for sunlight data collected over a long period of time
with an industrial camera. The proposed method makes use of the saturation and
value information of collected sunlight image data in Hue Saturation Value
color model to show the variation of the mood of the sunlight. Specifically, we
create visual patterns with a rotating planet gear, which has an intuitively
consistent geometric meaning with HSV color model and the planetary motion. Due
to the variation of the sunlight data over time, the generated visual pattern
presents a periodic variation that corresponds to the changing mood of the
sunlight. Furthermore, we also use the sunlight data to generate music as
another form of data representation. Two public artworks have been created with
the above visualization and auralization methods and displayed on an exhibition
held at China Resources Tower, Shenzhen, China. This work is a typical practice
of creating public installations with data visualization technology, giving a
glimpse into the many ways science and art intersect.
