The present invention can realize an effective character-inputting device only by utilizing an ordinary camera with a red-light filter and a simple red light-emitting device.
本发明仅仅利用一个普通的带红光滤镜的摄像头和一个简单的红光发射设备就可以实现一个有效的字符输入设备。
The present invention can realize an effective character-inputting device only by utilizing an ordinary camera with a red-light filter and a simple red light-emitting device.
本发明仅仅利用一个普通的带红光滤镜的摄像头和一个简单的红光发射设备就可以实现一个有效的字符输入设备。
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