"Gesture interaction" 10. Wii Remote

Wii Remote (nickname: Wiimote, Wii Remote) is the main controller of Nintendo game console Wii. Released at the Tokyo video game show in September 2005, the main feature of the WII Remote is motion detection, where players can interact with the virtual objects on the TV screen by moving and pointing. Because of its unique features and a great deal of difference from traditional game controllers, the WII remote has received a lot of attention since it was released.

The Wiimote features a traditional TV remote control, one-handed operation, a built-in CMOS camera, a three-axis accelerometer, a Bluetooth communication module, and a vibration sensor and speaker, both of which are designed to increase the immersion of the game.

Wiimote internal structure

The Wiimote is an infrared camera that senses the position of the infrared light source to achieve an optical sensing motion detection. But unlike almost all motion-tracking systems, Nintendo designed the infrared camera onto the Wiimote, and the infrared light source was designed to be placed on the sensor bar in front of the TV. Sensor Bar is a slender USB powered hardware device, the left and right sides of each of the 5 infrared led,wiimote handle inside the optical sensor, can be based on the acquisition of these LED imaging position, angle, change speed and other information, calculate the distance between the user from the TV, The direction, distance, speed, and movement of the upper and lower left and right movement (because of the relationship between the speed of operation, optical sensing intelligent calculation of slow moving speed, if it is fast forward and backward movement, such as punch, it must rely on the acceleration signal).

The advantage of designing the camera on the handle is that the signal processing is done by Wiimote, and the computed coordinates are sent back to the PC by Wiimote via Bluetooth, which reduces the requirement for PC CPU resources and can increase the frame rate. The Wii released its own data, said Wiimote's refresh rate of up to 100Hz, resolution of 1024x768, camera angle of 45°, effective sensing depth of 25-320 cm, over this range, the acquisition of infrared LED Light point began to blink, the signal received instability.

Some people use Wiimote do electronic whiteboard infrared pointer, its principle is: infrared pen inside infrared emitter tube emits infrared ray, hit to the Whiteboard curtain back, by side of Wiimote handle head receiver receives, Wiimote calculates the corresponding red spot position, Then through Bluetooth transmission to the Bluetooth adapter connected to the computer, the computer to get the location, simulation of the left mouse button click event, thus forming an interaction.

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"Gesture interaction" 10. Wii Remote