Online Handwriting Recognition Method with a Non-Inertial Reference Frame Based on the Measurement of Linear Accelerations and Differential Geometry: An Alternative to Quaternions

被引:0
|
作者
Abarca Jimenez, Griselda Stephany [1 ]
Garnica, Carmen Caritina Munoz [2 ]
Barranca, Mario Alfredo Reyes [2 ]
Carreno, Jesus Mares [1 ]
Blanco, Manuel Vladimir Vega [1 ]
Galicia, Francisco Gutierrez [1 ]
机构
[1] Inst Politecn Nacl IPN, Unidad Profes Interdisciplinaria Ingn Campus Hidal, Dist Educ Salud Ciencia Tecnol & Innovac, Carretera Pachuca-Actopan Kilometro 1, San Agustin Tlaxiaca 42162, Hidalgo, Mexico
[2] CINVESTAV IPN, Elect Engn Dept, Av Inst Politecn Nacl 2508, Mexico City 07360, Mexico
关键词
handwriting; non-inertial frame of reference; linear acceleration; inertial measurements; differential geometry; feature engineering; quaternion; MODEL;
D O I
10.3390/mi15081053
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
This work describes a mathematical model for handwriting devices without a specific reference surface (SRS). The research was carried out on two hypotheses: the first considers possible circular segments that could be made during execution for the reconstruction of the trace, and the second is the combination of lines and circles. The proposed system has no flat reference surface, since the sensor is inside the pencil that describes the trace, not on the surface as in tablets or cell phones. An inertial sensor was used for the measurements, in this case, a commercial Micro-Electro Mechanical sensor of linear acceleration. The tracking device is an IMU sensor and a processing card that allows inertial measurements of the pen during on-the-fly tracing. It is essential to highlight that the system has a non-inertial reference frame. Comparing the two proposed models shows that it is possible to construct shapes from curved lines and that the patterns obtained are similar to what is recognized; this method provides an alternative to quaternion calculus for poorly specified orientation problems.
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页数:16
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