28--30 Sep. 2012 in Kobe Shadow++ will appear in EC2012.
5--9 Aug. 2012 in L.A. Shadow++ was appeared in Poster session at SIGGRAPH2012.
Touei is a multiplexing invisible shadow system which intends to achieve an “ex-ormation” of shadow. The proposed system uses infrared lights each of which radiate a certain wavelength of infrared light, and an object on which two kinds of IR filters are attached. By emitting the light to the object, the object’s shadow apears, then the shape of the object changes to a different shape in accordance with the wavelength of the radiated infrared light. With this system, a user is expected to obtain a different recognition about shadow. Keywords : Shadow, Infrared Light, IR Filter, Information Multiplexing, Ex-formation
Shadow++ is a system for a novel Shadow-picture playing environment. Shadow-picture playing, where pseudo-shapes such as animals and humans are made by using hands and/or objects, is a popular pastime among people. Shadow++ enhances the experience of this Shadow-playing. The system makes kinetic Shadows as opposed to traditional Shadow-picture playing, which only makes Shadows similar to the shapes of objects. The kinetic Shadow transforms the shape into different things along with movement of the object. Given that the system provides a simple interaction—that is, similar to that in traditional Shadow-picture playing—even a user with no prior experience of using the system can use it easily and intuitively.
The invisible marker is also an important part of the Shadow++. The marker is useful for capturing objects and specifying locations. In recent years, markers have been applied to various systems. However, the unnatural pattern of the marker may spoil the appearance of the object. The invisible marker that our system employs is made with an IR filter that only transmits infrared light with a wavelength over a certain value. Since the marker is covered with IR filters, the user sees the object and Shadow without noticing the marker, while a computer captures the marker by looking at the object through the IR filter. Since this mechanism is simple and robust (i.e., does not require a circuit and electricity), it is easy to increase wavelength-dependent information by attaching extra IR filters to isolate another wavelength.
By using Shadow++, a user can have an amazing experience by participating in a “Shadow world” in which Shadows behave differently from those in our ordinary lives.