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논문 기본 정보

자료유형
학술저널
저자정보
남성국 (영남대학교) 이동건 (영남대학교) 서영석 (영남대학교)
저널정보
한국정보처리학회 JIPS(Journal of Information Processing Systems) JIPS(Journal of Information Processing Systems) 제19권 제3호
발행연도
2023.6
수록면
289 - 301 (13page)
DOI
10.3745/JIPS.04.0274

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Due to the development and dissemination of modern technology, anyone can easily communicate usingservices such as social network service (SNS) through a personal computer (PC) or smartphone. The developmentof these technologies has caused many beneficial effects. At the same time, bad effects also occurred, oneof which was the spam problem. Spam refers to unwanted or rejected information received by unspecifiedusers. The continuous exposure of such information to service users creates inconvenience in the user's use ofthe service, and if filtering is not performed correctly, the quality of service deteriorates. Recently, spammersare creating more malicious spam by distorting the image of spam text so that optical character recognition(OCR)-based spam filters cannot easily detect it. Fortunately, the level of transformation of image spamcirculated on social media is not serious yet. However, in the mail system, spammers (the person who sendsspam) showed various modifications to the spam image for neutralizing OCR, and therefore, the same situationcan happen with spam images on social media. Spammers have been shown to interfere with OCR readingthrough geometric transformations such as image distortion, noise addition, and blurring. Various techniqueshave been studied to filter image spam, but at the same time, methods of interfering with image spamidentification using obfuscated images are also continuously developing. In this paper, we propose a deeplearning-based spam image detection model to improve the existing OCR-based spam image detectionperformance and compensate for vulnerabilities. The proposed model extracts text features and image featuresfrom the image using four sub-models. First, the OCR-based text model extracts the text-related features,whether the image contains spam words, and the word embedding vector from the input image. Then, theconvolution neural network-based image model extracts image obfuscation and image feature vectors from theinput image. The extracted feature is determined whether it is a spam image by the final spam image classifier. As a result of evaluating the F1-score of the proposed model, the performance was about 14 points higher thanthe OCR-based spam image detection performance.

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