Class attendance is important.Class attendance recording is often done using“roll-call”or signing attendance registers.These are time consuming,easy to cheat,and it is difficult to draw any information from them.The...Class attendance is important.Class attendance recording is often done using“roll-call”or signing attendance registers.These are time consuming,easy to cheat,and it is difficult to draw any information from them.There are other,expensive alternatives to automate attendance recording with varying accuracy.This study experimented with a smartphone camera and different combinations of face detection and recognition algorithms to determine if it can be used to record attendance successfully,while keeping the solution cost-effective.The effect of different class sizes was also investigated.The research was done within a pragmatism philosophy,using a prototype in a field experiment.The algorithms that were used are Viola–Jones(Haar features),deep neural network and histogram of oriented gradients for detection,and eigenfaces,fisherfaces,and local binary pattern histogram for recognition.The best combination was Viola–Jones combined with fisherfaces,with a mean accuracy of 54%for a class of 10 students and 34.5%for a class of 22 students.The best all over performance on a single class photo was 70%(class size 10).As is,this prototype is not accurate enough to use,but with a few adjustments,it may become a cheap,easy-to-implement solution to the attendance recording problem.展开更多
In traditional English class of China, the relationship between teacher and students is one-way communication. As a result, positive attendance in senior English class is not common. It is important to develop student...In traditional English class of China, the relationship between teacher and students is one-way communication. As a result, positive attendance in senior English class is not common. It is important to develop students' automatic learning and cooperation learning abilities. However, the particularities of senior students in psychology and the background of college entrance examination block the way of traditional teaching reform. From these aspects, this thesis comes up with corresponding advices to promote the attendance of senior English class.展开更多
为弥补传统课堂考勤机制占用上课时间,无法避免替点名现象的发生,研制了一套基于无线射频识别(RFID:Radio Frequency Identification)技术的校园课堂考勤系统。该系统结合校园中已普及的"一卡通"等学生IC卡,采用两对对射式红...为弥补传统课堂考勤机制占用上课时间,无法避免替点名现象的发生,研制了一套基于无线射频识别(RFID:Radio Frequency Identification)技术的校园课堂考勤系统。该系统结合校园中已普及的"一卡通"等学生IC卡,采用两对对射式红外传感器和FM1702SL无线射频读卡器相结合方式,获取上课学生的姓名、学号和进出教室状态等信息,并通过nRF24L01无线传输模块和FT232RL电平转换电路,将信息传输到上位机。上位机通过由Visual Basic语言编写的软件程序,自动统计和整理信息,并生成学生平时成绩,免去了教师手动统计的负担。对101名学生代刷卡的违规操作及82名学生正常刷卡操作进行测试,结果显示,违规进出学生人数为98人,正常刷卡人数为81人,相对误差均小于3%。展开更多
文摘Class attendance is important.Class attendance recording is often done using“roll-call”or signing attendance registers.These are time consuming,easy to cheat,and it is difficult to draw any information from them.There are other,expensive alternatives to automate attendance recording with varying accuracy.This study experimented with a smartphone camera and different combinations of face detection and recognition algorithms to determine if it can be used to record attendance successfully,while keeping the solution cost-effective.The effect of different class sizes was also investigated.The research was done within a pragmatism philosophy,using a prototype in a field experiment.The algorithms that were used are Viola–Jones(Haar features),deep neural network and histogram of oriented gradients for detection,and eigenfaces,fisherfaces,and local binary pattern histogram for recognition.The best combination was Viola–Jones combined with fisherfaces,with a mean accuracy of 54%for a class of 10 students and 34.5%for a class of 22 students.The best all over performance on a single class photo was 70%(class size 10).As is,this prototype is not accurate enough to use,but with a few adjustments,it may become a cheap,easy-to-implement solution to the attendance recording problem.
文摘In traditional English class of China, the relationship between teacher and students is one-way communication. As a result, positive attendance in senior English class is not common. It is important to develop students' automatic learning and cooperation learning abilities. However, the particularities of senior students in psychology and the background of college entrance examination block the way of traditional teaching reform. From these aspects, this thesis comes up with corresponding advices to promote the attendance of senior English class.
文摘为弥补传统课堂考勤机制占用上课时间,无法避免替点名现象的发生,研制了一套基于无线射频识别(RFID:Radio Frequency Identification)技术的校园课堂考勤系统。该系统结合校园中已普及的"一卡通"等学生IC卡,采用两对对射式红外传感器和FM1702SL无线射频读卡器相结合方式,获取上课学生的姓名、学号和进出教室状态等信息,并通过nRF24L01无线传输模块和FT232RL电平转换电路,将信息传输到上位机。上位机通过由Visual Basic语言编写的软件程序,自动统计和整理信息,并生成学生平时成绩,免去了教师手动统计的负担。对101名学生代刷卡的违规操作及82名学生正常刷卡操作进行测试,结果显示,违规进出学生人数为98人,正常刷卡人数为81人,相对误差均小于3%。
