• 제목/요약/키워드: Automatic Recognition System

검색결과 639건 처리시간 0.027초

영상처리와 DS-SS통신 방식을 이용한 Automatic Car Parking System 구현 (Implementation of Automatic Car Parking System using vision processing and DS-SS communication system)

  • 김대천;봉병은;임명섭
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
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    • pp.78-80
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    • 2005
  • The pattern recognition of automobile and parking line for the automatic car parking system was processed based on statistical method for reducing the processing time. The command of driving for parking at the vacant parking lot was transmitted from processor to motor driven actuator using direct sequence spread spectrum communication, which enables the multiple transmission in CAN(controller area network). The test-bed which has CCD camera, processor, radio transceiver and FPGA was implemented and demonstrated to be operated well.

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최대 개념강도 인지기법을 이용한 데이터베이스 자동선택 방법에 관한 연구 (A Study on Automatic Database Selection Technique Using the Maximal Concept Strength Recognition Method)

  • 정도헌
    • 정보관리학회지
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    • 제27권3호
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    • pp.265-281
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    • 2010
  • 본 연구에서 제안하는 기법은 최대 개념강도 인지기법(Maximal Concept-Strength Recognition Method: MCR)이다. 신규 데이터베이스가 입수되어 자동분류가 필요한 경우에, 기 구축된 여러 데이터 베이스 중에서 최적의 데이터베이스가 어떤 것인지 알 수 없는 상태에서 MCR 기법은 가장 유사한 데이터베이스를 선택할 수 있는 방법을 제공한다. 실험을 위해 서로 다른 4개의 학술 데이터베이스 환경을 구성하고 MCR 기법을 이용하여 최고의 성능값을 측정하였다. 실험 결과, MCR을 이용하여 최적의 데이터베이스를 정확히 선택할 수 있었으며 MCR을 이용한 자동분류 정확률도 최고치에 근접하는 결과를 보여주었다.

다양한 음성을 이용한 자동화자식별 시스템 성능 확인에 관한 연구 (Variation of the Verification Error Rate of Automatic Speaker Recognition System With Voice Conditions)

  • 홍수기
    • 대한음성학회지:말소리
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    • 제43호
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    • pp.45-55
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    • 2002
  • High reliability of automatic speaker recognition regardless of voice conditions is necessary for forensic application. Audio recordings in real cases are not consistent in voice conditions, such as duration, time interval of recording, given text or conversational speech, transmission channel, etc. In this study the variation of verification error rate of ASR system with the voice conditions was investigated. As a result in order to decrease both false rejection rate and false acception rate, the various voices should be used for training and the duration of train voices should be longer than the test voices.

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Nucleus Recognition of Uterine Cervical Pap-Smears using FCM Clustering Algorithm

  • Kim, Kwang-Baek
    • Journal of information and communication convergence engineering
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    • 제6권1호
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    • pp.94-99
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    • 2008
  • Segmentation for the region of nucleus in the image of uterine cervical cytodiagnosis is known as the most difficult and important part in the automatic cervical cancer recognition system. In this paper, the region of nucleus is extracted from an image of uterine cervical cytodiagnosis using the HSI model. The characteristics of the nucleus are extracted from the analysis of morphemetric features, densitometric features, colormetric features, and textural features based on the detected region of nucleus area. The classification criterion of a nucleus is defined according to the standard categories of the Bethesda system. The fuzzy C-means clustering algorithm is employed to the extracted nucleus and the results show that the proposed method is efficient in nucleus recognition and uterine cervical Pap-Smears extraction.

독일어 감정음성에서 추출한 포먼트의 분석 및 감정인식 시스템과 음성인식 시스템에 대한 음향적 의미 (An Analysis of Formants Extracted from Emotional Speech and Acoustical Implications for the Emotion Recognition System and Speech Recognition System)

  • 이서배
    • 말소리와 음성과학
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    • 제3권1호
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    • pp.45-50
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    • 2011
  • Formant structure of speech associated with five different emotions (anger, fear, happiness, neutral, sadness) was analysed. Acoustic separability of vowels (or emotions) associated with a specific emotion (or vowel) was estimated using F-ratio. According to the results, neutral showed the highest separability of vowels followed by anger, happiness, fear, and sadness in descending order. Vowel /A/ showed the highest separability of emotions followed by /U/, /O/, /I/ and /E/ in descending order. The acoustic results were interpreted and explained in the context of previous articulatory and perceptual studies. Suggestions for the performance improvement of an automatic emotion recognition system and automatic speech recognition system were made.

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FPGA-Based Hardware Accelerator for Feature Extraction in Automatic Speech Recognition

  • Choo, Chang;Chang, Young-Uk;Moon, Il-Young
    • Journal of information and communication convergence engineering
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    • 제13권3호
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    • pp.145-151
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    • 2015
  • We describe in this paper a hardware-based improvement scheme of a real-time automatic speech recognition (ASR) system with respect to speed by designing a parallel feature extraction algorithm on a Field-Programmable Gate Array (FPGA). A computationally intensive block in the algorithm is identified implemented in hardware logic on the FPGA. One such block is mel-frequency cepstrum coefficient (MFCC) algorithm used for feature extraction process. We demonstrate that the FPGA platform may perform efficient feature extraction computation in the speech recognition system as compared to the generalpurpose CPU including the ARM processor. The Xilinx Zynq-7000 System on Chip (SoC) platform is used for the MFCC implementation. From this implementation described in this paper, we confirmed that the FPGA platform is approximately 500× faster than a sequential CPU implementation and 60× faster than a sequential ARM implementation. We thus verified that a parallelized and optimized MFCC architecture on the FPGA platform may significantly improve the execution time of an ASR system, compared to the CPU and ARM platforms.

접촉각 측정 원리를 이용한 새로운 사이즈도 측정기 (제2보) -자동 접촉각 측정 시스템의 신뢰성 및 재현성 - (Development of a Novel System for Measuring Sizing Degree Based on Contact Angle (II) - Reliability and Reproducibility of the New Automatic Measuring System for Contact Angle -)

  • 이찬용;김철환;최경민;박종열;권오철
    • 펄프종이기술
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    • 제35권3호
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    • pp.53-58
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    • 2003
  • The newly developed system for measuring a contact angle on a sheet was examined to investigate reliability and reproducibility of the measured results. It was clearly confirmed that the automatic contact angle measuring system was much faster and more reliable way to determine the water resistance of a sheet, comparing with Cobb and Stockigt sizing tests. Cobb test showed less significant results with stringently sized sheets, and Stockigt test exhibited the big deviations by discrepancy of the recognition point of coloring according to different testers in spite of explicit test results. On the other hand, the contact angles measured by the automatic system were reproduced with less deviations, irrespectively of different testers. It was interesting to note that the contact angle might be able to used to predict Cobb and Stockigt sizing degree, based upon the high correlation coefficients of 0.95 and 0.97. Hereafter the automatic system will be upgraded to predict Cobb and stockigt sizing degree through the measurement of contact angle.

음성인식기를 이용한 한국인의 외국어 발화오류 자동 검출 (Automatic Detection of Mispronunciation Using Phoneme Recognition For Foreign Language Instruction)

  • 권철홍;강효원;이상필
    • 대한음성학회지:말소리
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    • 제48호
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    • pp.127-139
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    • 2003
  • An automatic pronunciation correction system provides learners with correction guidelines for each mispronunciation. In this paper we propose an HMM based speech recognizer which automatically classifies pronunciation errors when Korean speak Japanese. For this purpose we also develop phoneme recognizers for Korean and Japanese. Experimental results show that the machine scores of the proposed recognizer correlate with expert ratings well.

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A Single Channel Speech Enhancement for Automatic Speech Recognition

  • 이진규;서현손;강홍구
    • 한국방송∙미디어공학회:학술대회논문집
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    • 한국방송공학회 2011년도 하계학술대회
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    • pp.85-88
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    • 2011
  • This paper describes a single channel speech enhancement as the pre-processor of automatic speech recognition system. The improvements are based on using optimally modified log-spectra (OM-LSA) gain function with a non-causal a priori signal-to-noise ratio (SNR) estimation. Experimental results show that the proposed method gives better perceptual evaluation of speech quality score (PESQ) and lower log-spectral distance, and also better word accuracy. In the enhancement system, parameters was turned for automatic speech recognition.

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MATHEMATICAL IMAGE PROCESSING FOR AUTOMATIC NUMBER PLATE RECOGNITION SYSTEM

  • Kim, Sun-Hee;Oh, Seung-Mi;Kang, Myung-Joo
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • 제14권1호
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    • pp.57-66
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    • 2010
  • In this paper, we develop the Automatic Number Plate Recognition (ANPR) System. ANPR is generally composed of the following four steps: i) The acquisition of the image; ii) The extraction of the region of the number plate; iii) The partition of the number and iv) The recognition. The second and third steps incorporate image processing technique. We propose to resolve this by using Partial Differential Equation(PDE) based segmentation method. This method is computationally efficient and robust. Results indicate that our methods are capable to recognize the plate number on difficult situations.