#2: The patents I've seen so far all deal with xlr or xlr+gyro configurations. From the sounds of it, PixArt has no reason to own any of the IP relating to an xlr+gyro+camera system (they deal exclusively with the image sensor and image processing) so my guess is we'll be in the dark with regards to the technical specifics of the wiimote for a while still.
My guess is already in use, and this sorta confirms my earlier suspicions regarding the function of the sensor bar.
The sensor bar contains LEDs that blink in a defined pattern with defined timing. The wiimote has a camera behind the panel in the front, and images the sensor bar. From this it can determine distance and roll (reasonably accurately) and horizontal position and yaw (less accurately) relative to the bar. This puts it on a circle orbiting the axis of the bar. Using the on-board xlr and gyro it can determine the pitch which combined with the known data provides the vertical position. It also gets a second sampling of the roll.
Is there any info on what the purpose of the Sensor Bar and IR window in the front the the wiimote is for? I have a guess:
Sensor bar contains IR LEDs that flash in a predictable pattern, wiimote has a IR camera behind the window (think a cameraphone-grade camera). From this they can get orientation relative to the TV, and distance (by how wide the "sensor bar" is). Combined with the accelerometer-based orientation they can recover a full 3D position.
Joystiq pumpkin-carving contest (win Castlevania: Dracula X Chronicles!)
Oct 23rd 2007 4:34PM (Joystiq)PixArt to provide object tracking tech for Wii
May 14th 2006 5:44AM (Joystiq)PixArt to provide object tracking tech for Wii
May 14th 2006 4:51AM (Joystiq)The sensor bar contains LEDs that blink in a defined pattern with defined timing. The wiimote has a camera behind the panel in the front, and images the sensor bar. From this it can determine distance and roll (reasonably accurately) and horizontal position and yaw (less accurately) relative to the bar. This puts it on a circle orbiting the axis of the bar. Using the on-board xlr and gyro it can determine the pitch which combined with the known data provides the vertical position. It also gets a second sampling of the roll.
Hands on with Nintendo's Wii controller
May 10th 2006 8:42PM (Engadget)Sensor bar contains IR LEDs that flash in a predictable pattern, wiimote has a IR camera behind the window (think a cameraphone-grade camera). From this they can get orientation relative to the TV, and distance (by how wide the "sensor bar" is). Combined with the accelerometer-based orientation they can recover a full 3D position.