• Title, Summary, Keyword: JNI library

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Development of Smart Fingerprint Recognition System with Android Platform (안드로이드 플랫폼을 탑재한 스마트 지문인식장치 개발)

  • Lee, Kap Rai
    • Journal of Institute of Control, Robotics and Systems
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    • v.18 no.11
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    • pp.1018-1026
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    • 2012
  • This paper presents a developing method of smart fingerprint recognition system. First, we design a hardware configuration circuit using a 32bit Risc CPU, a fingerprint sensor, a LCD, and a WiFi communication chip to realize the smart fingerprint recognition systems. It is necessary to develop a JNI (Java Native Interface) library and a device drive program of fingerprint sense to develop application program of fingerprint recognition system with Android platform. Thus second, we develop a device drive and a JNI program. And we also develop an application program of fingerprint recognition systems using developed JNI library. Finally test results are presented to illustrate the performance of the developed smart fingerprint recognition system.

Mixed-mode execution environment using the JNI (JNI를 사용한 혼합형 실행 환경)

  • Kim Sang-Hoon
    • The Journal of Information Technology
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    • v.5 no.4
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    • pp.35-44
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    • 2002
  • The tradeoff of Java's portability is the inefficiency of interpretation. Also, the standard Java class library may not support the platform-dependent features needed by your application. Several solutions have been proposed to overcome these problems, such as JNI, JIT, off-line bytecode compilers. In this paper, we present an mixed-mode execution model which Java virtual machine executes together with native code. This execution model and its translator preserves the ability to dynamically load bytecode, and reduce the difficulties of JNI usages. Our system is more efficient than JIT, and helps programmer to write C implementation for the native method without the concept of JNI.

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Java and C/C++ Mixed Programming (자바와 C/C++의 혼합 프로그래밍)

  • Kim, Sang-Hoon
    • Journal of Korea Multimedia Society
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    • v.13 no.10
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    • pp.1514-1524
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    • 2010
  • The standard Java class library does not support the platform-dependent features needed by the application. Therefore, the Java application including the platform -dependent features must supplement the required features by invoking native functions using JNI. The native language programmer has to explicitly specify how to connect to various Java objects and later to disconnect from them. In this paper, I suggest a way to avoid these annoying works. The native method in the pure java class can not contain a native code block. By providing a native code block for the native method, it is possible for programmer to write a native code without being aware of JNI. To achieve this, I introduced the native class that is a java class on the native environment, and made it possible to interchange data by placing an arbitrator between the java class and the native class.

Design and Implementation of Java Crypto Provider for Android Platform (안드로이드 플랫폼을 위한 자바 보안 프로바이더 설계 및 구현)

  • Son, Mikyung;Kang, Namhi
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37C no.9
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    • pp.851-858
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    • 2012
  • Java crypto library such as SUN JCA/JCE or BC JCE is generally used to implement secure applications for smart devices using Android platform. Programming functions written by Java language are launched and executed inside Java Virtual Machine (JVM), thereby difficult to use system hardware specific functionalities and degrading performance as well. In case of crypto primitive, few secure applications can use crypto primitive executing in JVM because both amount of computing and complexity of such primitives are very high. From the aspect of performance, in particular, time sensitive real time applications such as streaming services or secure application frequently applying public key based crypto algorithm cannot use Java crypto library. To solve the problem, we design and implement crypto library which employ JNI and NDK methods to directly access functions that implemented by native language such as C or C++. The proposed Java Crypto provider supports faster execution. Also developer can use our provider in the same way by writing traditional Java crypto library.

Implimentation of MMS using JNI (JNI를 이용한 MMS 구현)

  • Jang, Kyung-Soo;Shin, Dong-Ryeol
    • The Transactions of the Korea Information Processing Society
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    • v.7 no.1
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    • pp.135-145
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    • 2000
  • Manufacturing Message Specification (MMS) is designed as a communication standard protocol, ISO/IEC 9506, on factory automation for messaging between heterogeneous programmable unit controller, PLC, NC, Robot, of different vendors on the networks. MMS is also a standard protocol of OSI reference model application layer, In this paper, we show an implementation of MMS over TCP/IP using ANSI-C programming language on the unix environment, and make java classification using java native interface (NJI) with MMS library. The use of java classification provides a basic environment ot overcome a difficult programming with different MMS application programming interface (MMS-I) which requires a siklled programming technique of graphic user interface (GUI). In this paper, we implement a MMS application program of the automated assembly model for printed circuit board based on WWW which shows the operation, control and monitoring of real manufacturing device (RMD) with web browser providing users for consistent user interface.

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Smart Phone Based Image Processing Methods for Motion Detection of a Moving Object via a Network Camera (네트워크 카메라의 움직이는 물체 감지를 위한 스마트폰 기반 영상처리 방법)

  • Kim, Young Jin;Kim, Dong Hwan
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.1
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    • pp.65-71
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    • 2013
  • In this work, new smart phone based moving target detection is proposed. In order to implement the task, methods of real time image transmission from network camera, motion detecting algorithm and its effective implementation are also addressed. The network camera transfers image data by MJPEG format which contains various information such as data and IP address, and the smart phone separates the image data received through a WiFi module. Later, the image data is converted to a Bitmap image format, and with the help of the embedded OpenCV library on a smart phone and algorithm, it was found that the moving object was identified effectively in terms of real time monitoring and detection.

Study of NFC Library Execution in Real-time on Android 플랫폼 for NFC Application (NFC 전자 결제 시스템을 위한 Android NFC Library 실시간 실행 처리 연구)

  • Yoo, Hyun-Joo;Jung, Min-Soo
    • Journal of Digital Convergence
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    • v.11 no.2
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    • pp.257-262
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    • 2013
  • In mobile market which has been developed drastically, short distance mobile Near Field Communication is becoming the conversation topic. Google adopted this NFC technology to Android 플랫폼 for securing the leadership and many another countries including domestic companies are putting spurs to develop service and technology by connecting mobile carrier and the financial. Within this circumstance, most noticeable issue is securing stability of nfc application service. Android 플랫폼 is operating system of mobile device and also a software stack which is required limited hardware and immediate response. However, since its structural characteristic which is suitable for limited hardware, the response is not quite stable for real time process. That is, this paper researches by analyzing real time response of NFC related library provided from Android 플랫폼 and applying the result to NFC application for securing stable data process and response.