2025-02-23T09:30:02-05:00 DEBUG: VuFindSearch\Backend\Solr\Connector: Query fl=%2A&wt=json&json.nl=arrarr&q=id%3A%22mcmtechkpnueduua-article-121746%22&qt=morelikethis&rows=5
2025-02-23T09:30:02-05:00 DEBUG: VuFindSearch\Backend\Solr\Connector: => GET http://localhost:8983/solr/biblio/select?fl=%2A&wt=json&json.nl=arrarr&q=id%3A%22mcmtechkpnueduua-article-121746%22&qt=morelikethis&rows=5
2025-02-23T09:30:02-05:00 DEBUG: VuFindSearch\Backend\Solr\Connector: <= 200 OK
2025-02-23T09:30:02-05:00 DEBUG: Deserialized SOLR response
Метод виявлення зображень, перезбережених у формат без втрат з формату з втратами
Unauthorized changes of the digital image require its subsequent saving in some file format which may be different from the original one. The detection of the re-saving image from one format to another is an indirect indication of its integrity violation. The method of separating digital images tha...
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| Main Author: | |
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| Format: | Article |
| Language: | Ukrainian |
| Published: |
Kamianets-Podilskyi National Ivan Ohiienko University
2017
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| Online Access: | http://mcm-tech.kpnu.edu.ua/article/view/121746 |
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| Summary: | Unauthorized changes of the digital image require its subsequent saving in some file format which may be different from the original one. The detection of the re-saving image from one format to another is an indirect indication of its integrity violation. The method of separating digital images that originally saved in lossless format from images that were re-saved in lossless from lossy format was developed. The proposed method based on analysis of the normalized vector of singular values and left (right) singular vectors, corresponding to the maximal singular value, of blocks of image matrix. The developed method can be used independently as well as an integral part of the steganalysis process. |
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