Abstract
In the electronic whiteboard system based on machine vision,an improved mean filter was proposed to eliminate touching-point jitter.In order to enhance the working fluency without hardware restrictions,a coordinate interpolation based on curve-fitting was adopted to improve the real-time performance of the whole system and smooth the trajectory of moving touching-point.The experimental results show that: on one hand,touching-point jitter can be eliminated.On the other hand,the system can output 180 touching-point coordinates per second when the camera works at its highest speed of 60 frame per second.The real-time performance of the whole system gets effectively improved without any new hardware cost.
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