Collection of characters written by the fingertip and mechanical measurement of their characteristics

研究使用了两种输入设备，人们可以用指尖在自然感觉中写出字符。一种是三维定点设备幻影，另一种是数字化仪。这些输入设备是经过精心挑选的，采集的字符数据的时间精度尽可能好。当使用三维指点设备时，写字者将麻袋安装在指尖。并且，通过在空间中移动指尖，可以以10ms的间隔收集x、y和z的三维坐标值数据。没有笔，数字化仪无法实现指尖书写的第一个目的。然而，由于数字化仪除可以测量x、y两维坐标值外，还可以测量笔的倾斜度和压力值，能够采集到大量的数据，对指尖在空间写字得到的数据进行处理的研究还是空白。我们尝试输入并识别一个简单的符号，如圆圈和复选标记。10名测试者通过三维指点设备分别写出了100个字符和签名，能够准确地识别两个手势。总数据量超过10,000个字符，我们能够为未来的研究建立一个有价值的有用数据库。注：Phantom是Sensable Technologies公司的注册商标。

Two input equipments to which the person is able to write the character by the fingertip in natural feelings were used for the research. One is three-dimensional pointing device PHANToM and the other is a digitizer. These input equipments were chosen carefully to collect the character data that the temporal accuracy is as good as possible. When three-dimensional pointing device is used, the writing person installs the sack in the fingertip. And, three dimension coordinates value data of x, y and z can be collected at 10ms intervals by moving the fingertip in the space. The digitizer cannot achieve the first purpose of writing by the fingertip without a pen. However, the digitizer can measure the inclination and pressure of the pen besides two dimension coordinates value of x and y, and we were able to collect a large amount of the data.The research on which the data obtained by writing the character in the space by the fingertip is processed has never been done. We tried to input and to recognize an easy sign like the circle and the check mark. It turned out to be able to recognize two signs accurately by the ratio to the distance between the both end points and the length of entire strokes.10 testers wrote 100 characters and signatures respectively by using three-dimensional pointing device. The number of total data was exceeding 10,000 characters and we were able to make a valuable useful database for the research in the future.Note : PHANToM is a registered trademark of the SensAble Technologies Company.