• 제목/요약/키워드: Barcode

검색결과 346건 처리시간 0.083초

QR Barcode Readability Technique of the JPEG Image Based on Digital Watermarking

  • Seo, Jung Hee;Park, Hung Bok
    • Journal of information and communication convergence engineering
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    • 제16권3호
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    • pp.179-188
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    • 2018
  • This paper proposes a quick response (QR) barcode watermarking algorithm in order to improve readability of the QR barcode in a JPEG image. The proposed algorithm embeds a watermark in a wavelet based-low frequency band for watermark robustness, and visually extracts a QR barcode after embedding the QR barcode image with confidential information into the original image via imperceptible watermarking technology. The visually extracted QR barcode watermark uses an approach to authenticate the ownership more easily through a common hardware and software-based mobile barcode reader app. Therefore, the QR barcode watermark may improve the ability to easily detect watermarks efficiently as well as imperceptibility and robustness, which is the main watermark requirement by embedding the QR barcode with watermark text information in a digital image and when compare to conventional watermarks.

Data Matrix 이차원 바코드에서 코드워드를 추출하는 알고리즘 구현 (Extracting Symbol Informations from Data Matrix two dimensional Barcode Image)

  • 황진희;한희일
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2002년도 하계종합학술대회 논문집(4)
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    • pp.227-230
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    • 2002
  • In this paper, we propose an algorithm to decode Data Matrix two dimensional barcode symbology. We employ hough transform and bilinear image warping to extract the barcode region from the image scanned using a CMOS digital camera. The location of barcode can be found by applying Hough transform. However, barcode image should be warped due to the nonlinearity of lens and the viewing angle of camera. In this paper, bilinear warping transform is adopted to wa게 and align the barcode region of the scanned image. Codeword can be detected from the aligned barcode region.

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바코드에 있어서 체크숫자를 이용한 오류수정과 바코드의 현재와 미래 (Error Correcting using the Check digit on Barcode, and the present and future of Barcode)

  • 김화준
    • 한국수학사학회지
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    • 제21권2호
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    • pp.103-118
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    • 2008
  • 바코드의 역사, 그 체크숫자(check digit)를 이용한 오류수정과 바코드의 현재와 미래에 대하여 조사를 하였다. 이 논문을 통하여, 현재 바코드와 관련하여 진행 중인 연구에 대한 소개와 연구방향에 대하여 약간의 제시를 하고자 한다.

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Robust Video-Based Barcode Recognition via Online Sequential Filtering

  • Kim, Minyoung
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제14권1호
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    • pp.8-16
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    • 2014
  • We consider the visual barcode recognition problem in a noisy video data setup. Unlike most existing single-frame recognizers that require considerable user effort to acquire clean, motionless and blur-free barcode signals, we eliminate such extra human efforts by proposing a robust video-based barcode recognition algorithm. We deal with a sequence of noisy blurred barcode image frames by posing it as an online filtering problem. In the proposed dynamic recognition model, at each frame we infer the blur level of the frame as well as the digit class label. In contrast to a frame-by-frame based approach with heuristic majority voting scheme, the class labels and frame-wise noise levels are propagated along the frame sequences in our model, and hence we exploit all cues from noisy frames that are potentially useful for predicting the barcode label in a probabilistically reasonable sense. We also suggest a visual barcode tracking approach that efficiently localizes barcode areas in video frames. The effectiveness of the proposed approaches is demonstrated empirically on both synthetic and real data setup.

Identification of bird species and their prey using DNA barcode on feces from Korean traditional village groves and forests (maeulsoop)

  • Joo, Sungbae;Park, Sangkyu
    • Animal cells and systems
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    • 제16권6호
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    • pp.488-497
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    • 2012
  • A DNA barcode based on 648 bp of cytochrome c oxidase I (COI) gene aims to build species-specific libraries for animal groups. However, it is hard to recover full-length (648 bp) barcode gene from environmental fecal samples due to DNA degradation. In this study, we designed a new primer set (K_Bird), which amplifies a 226 bp fragment targeted an inner position of full-length COI barcode based on 102 species of Korean birds to improve amplification success, and we attempted to identify bird species from 39 avian fecal samples collected during 4 months from Jinan, South Korea. Simultaneously, we conducted a dietary analysis using a universal DNA mini-barcode (Uni_Minibar) from same fecal samples. In silico analysis on newly designed mini-barcode represented that genetic distances were 0.5% in species and 9.1% in genera. Intraspecific variations of 149 species out of 174 species (86%) between Korea and North America were within the threshold (5.3% threshold in this study). From environmental fecal samples collected in Jinan, we identified seven avian species, which have high similarity (99-100%) with registered COI sequences in GenBank. Eight kinds of prey species, such as moth, spider, fly, and dragonfly, were identified in dietary analysis. We suppose that our strategy applying mini-barcode for environmental fecal samples, might be a useful and convenient tool for species identification and dietary analysis for birds.

바코드 지불 결제 시스템 취약점 분석 및 대응방안 연구 (A Study on Vulnerability Analysis and Countermeasure in Barcode Payment System)

  • 이재식;이상훈;전문석
    • 디지털산업정보학회논문지
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    • 제8권3호
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    • pp.65-74
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    • 2012
  • A barcode is a representative means of cognition. It is either printed on the package of a product or attached to it as a sticker. It is used for the fast cognition of a product at a store. It is considerably cheap to make a barcode. Also, it is possible to read it fast by using a barcode reader. Because of such convenience provided by the barcode, a new system using the barcode as a means of settling payments like a currency or a credit card has been developed. However, due to its characteristics, it is easy to reduplicate, forge or falsify a barcode easily. Therefore, this study focuses on the case of applying the system using barcodes as a means of settling payments without providing solutions for the potential weaknesses. Also, this study suggests various points to consider regarding the creation of safe barcodes as one of the related measures, while providing various methods using additional means of certification other than the one of using barcodes in addition to the way of applying complexity with barcode numbers. Throughout this study, it will be possible to safely establish and operate the payment-settlement system using barcodes.

An integrated DNA barcode assay microdevice for rapid, highly sensitive and multiplex pathogen detection at the single-cell level

  • Jung, Jae Hwan;Cho, Min Kyung;Chung, So Yi;Seo, Tae Seok
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2013년도 제45회 하계 정기학술대회 초록집
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    • pp.276-276
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    • 2013
  • Here we report an integrated microdevice consisting of an efficient passive mixer, a magnetic separation chamber, and a capillary electrophoretic microchannel in which DNA barcode assay, target pathogen separation, and barcode DNA capillary electrophoretic analysis were performed sequentially within 30 min for multiplex pathogen detection at the single-cell level. The intestine-shaped serpentine 3D micromixer provides a high mixing rate to generate magnetic particle-pathogenic bacteria-DNA barcode labelled AuNP complexes quantitatively. After magnetic separation and purification of those complexes, the barcode DNA strands were released and analyzed by the microfluidic capillary electrophoresis within 5 min. The size of the barcode DNA strand was controlled depending on the target bacteria (Staphylococcus aureus, Escherichia coli O157:H7, and Salmonella typhimurium), and the different elution time of the barcode DNA peak in the electropherogram allows us to recognize the target pathogen with ease in the monoplex as well as in the multiplex analysis. In addition, the quantity of the DNA barcode strand (~104) per AuNP is enough to be observed in the laser-induced confocal fluorescence detector, thereby making single-cell analysis possible. This novel integrated microdevice enables us to perform rapid, sensitive, and multiplex pathogen detection with sample-in-answer-out capability to be applied for biosafety testing, environmental screening, and clinical trials.

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An assessment of the taxonomic reliability of DNA barcode sequences in publicly available databases

  • Jin, Soyeong;Kim, Kwang Young;Kim, Min-Seok;Park, Chungoo
    • ALGAE
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    • 제35권3호
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    • pp.293-301
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    • 2020
  • The applications of DNA barcoding have a wide range of uses, such as in taxonomic studies to help elucidate cryptic species and phylogenetic relationships and analyzing environmental samples for biodiversity monitoring and conservation assessments of species. After obtaining the DNA barcode sequences, sequence similarity-based homology analysis is commonly used. This means that the obtained barcode sequences are compared to the DNA barcode reference databases. This bioinformatic analysis necessarily implies that the overall quantity and quality of the reference databases must be stringently monitored to not have an adverse impact on the accuracy of species identification. With the development of next-generation sequencing techniques, a noticeably large number of DNA barcode sequences have been produced and are stored in online databases, but their degree of validity, accuracy, and reliability have not been extensively investigated. In this study, we investigated the extent to which the amount and types of erroneous barcode sequences were deposited in publicly accessible databases. Over 4.1 million sequences were investigated in three largescale DNA barcode databases (NCBI GenBank, Barcode of Life Data System [BOLD], and Protist Ribosomal Reference database [PR2]) for four major DNA barcodes (cytochrome c oxidase subunit 1 [COI], internal transcribed spacer [ITS], ribulose bisphosphate carboxylase large chain [rbcL], and 18S ribosomal RNA [18S rRNA]); approximately 2% of erroneous barcode sequences were found and their taxonomic distributions were uneven. Consequently, our present findings provide compelling evidence of data quality problems along with insufficient and unreliable annotation of taxonomic data in DNA barcode databases. Therefore, we suggest that if ambiguous taxa are presented during barcoding analysis, further validation with other DNA barcode loci or morphological characters should be mandated.

2D Barcode Detection Algorithm with Multiple Features Combination for a Long Distance Search

  • Pak, Myeongsuk;Kim, Sanghoon
    • 한국정보처리학회:학술대회논문집
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    • 한국정보처리학회 2015년도 추계학술발표대회
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    • pp.1506-1508
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    • 2015
  • A 2D barcode region localization system for the automatic inspection of a long distance logistics objects has been developed. For the successful 2D barcode localization, variance and frequency of the pixel distribution within average 2D barcodes is modeled and the average model of 2D barcode is combined with the corner features detection to localize the final 2D barcode candidates. An automatic 2D barcode localization software was developed with the multiple features mixture method and we tested our system on real camera images of several popular 2D barcode symbologies.

우편물 자도처리 촉진을 위한 우편용 고객 바코드 검증 시스템 (The Verification System of the Customer Barcode for the Advanced Automatic Processing of the Mail Items)

  • 박문성;송재관;우동진
    • 한국정보처리학회논문지
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    • 제6권4호
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    • pp.968-976
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    • 1999
  • 현재 유편봉투의 상태를 점검한 후, 우편 자동처리 센터(우편집 중국)에서 거의 대부분 OCR(Optical Character Recognition)로 우편주소 및 우편번호를 판독하여 3 of 5 형광(발광) 바코드로 7자리를 인쇄하고, 바코드 구분기(Barcode Sorter)에서 우편물을 자동구분 처리하고 있다. 일반적으로 자동처리 중에 우편주소 및 우편번호 잘못 기재, 주소 및 바코드 인쇄품질의 불량 등에 의하여 오류로 구분되어지는 우편 물량은 전체 우편물량의 31∼35%를 차지하고 있다. 본 논문에서는 이러한 문제점을 해결하기 위하여 도입될 고객 바코드 인쇄제도를 지원하기 위한 우편용 3 of 5 고객 바코드 및 우편주소 검증시스템을 개발하였다. 고객 바코드 검증시스템은 정해진 규격에 의해 고객 바코드가 정확하게 인쇄되었는지 검사하는 검증자 3 of 5 고객 바코드 검증시스템, 바코드 판독결과에 의하여 우편주소가 올바르게 작성되었는지 검사하는 우편주소 검증시스템을 제공하는 것이다.

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