{"id":1435,"date":"2016-09-14T17:06:36","date_gmt":"2016-09-14T17:06:36","guid":{"rendered":"https:\/\/www.digitalforensicscorp.com\/blog\/?p=1435"},"modified":"2024-12-11T19:00:01","modified_gmt":"2024-12-11T19:00:01","slug":"methods-of-digital-image-forgery-detection","status":"publish","type":"post","link":"https:\/\/www.digitalforensics.com\/blog\/software\/methods-of-digital-image-forgery-detection\/","title":{"rendered":"Methods of Digital Image Forgery Detection"},"content":{"rendered":"<p>Digital images and videos have become an essential part of our lives for a long time already. This fact made them the object of interest for <a href=\"https:\/\/www.digitalforensics.com\/\">digital forensic examiners and researchers<\/a>. Here are the main problems that can be solved during a forensic examination:<\/p>\n<ul>\n<li>searching for digital images or videos on digital media;<\/li>\n<li>reconstruction of fragmented or damaged files;<\/li>\n<li>improving quality of an image;<\/li>\n<li>detection of means and circumstances of digital images or videos production;<\/li>\n<li>digital images or videos forgery detection.<\/li>\n<\/ul>\n<p>Nowadays there are a lot of methods and tools capable of detecting forgery. Apart from such common methods, as visual examination of an image, including parameters correction (such as brightness, contrast, etc), the following methods are used by forensic community:<\/p>\n<ul>\n<li>shades and reflections;<\/li>\n<li>lighting;<\/li>\n<li>thumbnails analysis;<\/li>\n<li>error level analysis, ELA;<\/li>\n<li>luminance gradient analysis;<\/li>\n<li>principal component analysis, PCA;<\/li>\n<li>stamp, clone detection;<\/li>\n<li>chromatic aberration analysis;<\/li>\n<li>noise analysis.<\/li>\n<\/ul>\n<p>Also there are such methods, as file structure analysis, metadata analysis and some others, which are more often used for detection means of images or videos production, but not for forgery detection. It&#8217;s clear that traces\u00a0of an image editor in file&#8217;s metadata is quite suspicious, but changes in metadata or quantization index mismatch can&#8217;t be used as evidence of forgery (excluding evident repeating quantization).<\/p>\n<p>Even without methods of\u00a0detection means of images or videos production, provided list of methods is quite long. The thing is &#8211; different methods of images encoding and diversity of modifications, that can be used for digital images, change image&#8217;s properties available for forensic examination differently.<\/p>\n<p>For example, ELA method can be used only for JPEG images, searching for cloned parts won&#8217;t help to find single insertion or manual retouch, shadows analysis won&#8217;t help with pictures captured in cloudy weather, etc.<\/p>\n<p>So it&#8217;s very important for examiner to understand the reason of image forgery, methods available for detected type of\u00a0alteration and methods of its detection.<\/p>\n<p>Next time we will talk about using discussed methods of forgery detection in practice.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"References\"><\/span>References:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>1. J. O\u2019Brien and H. Farid. Exposing Photo Manipulation with Inconsistent Reflections. ACM Transactions on Graphics, 31(1):4:1-4:11, 2012.<\/p>\n<p>http:\/\/www.cs.dartmouth.edu\/farid\/downloads\/publications\/tog12.pdf<\/p>\n<p>2. E. Kee, J. O\u2019Brien, and H. Farid. Exposing Photo Manipulation from Shading and Shadows. ACM Transactions on Graphics, 33(5):165:1-165:21, 2014.<\/p>\n<p>http:\/\/www.cs.dartmouth.edu\/farid\/downloads\/publications\/tog14.pdf<\/p>\n<p>3. M.K. Johnson and H. Farid. Exposing Digital Forgeries by Detecting Inconsistencies in Lighting. ACM Multimedia and Security Workshop, New York, NY, 2005.<\/p>\n<p>http:\/\/www.cs.dartmouth.edu\/farid\/downloads\/publications\/acm05.pdf<\/p>\n<p>4. M.K. Johnson and H. Farid. Exposing Digital Forgeries in Complex Lighting Environments. IEEE Transactions on Information Forensics and Security, 2(3):450-461, 2007.<\/p>\n<p>http:\/\/www.cs.dartmouth.edu\/farid\/downloads\/publications\/tifs07a.pdf<\/p>\n<p>5. Detecting Forged (Altered) Images.<\/p>\n<p>articles.forensicfocus.com\/2013\/08\/22\/detecting-forged-altered-images\/<\/p>\n<p>6. A Picture&#8217;s Worth: Digital Image Analysis and Forensics. Dr. Neal Krawetz, Hacker Factor Solutions, August 2007. Presented at the Black Hat Briefings 2007.<\/p>\n<p>https:\/\/www.blackhat.com\/presentations\/bh-dc-08\/Krawetz\/Whitepaper\/bh-dc-08-krawetz-WP.pdf<\/p>\n<p>7. A.C. Popescu and H. Farid. Exposing Digital Forgeries by Detecting Duplicated Image Regions. TR2004-515, Department of Computer Science, Dartmouth College, September 2004. http:\/\/www.cs.dartmouth.edu\/farid\/downloads\/publications\/tr04.pdf<\/p>\n<p>8. M.K. Johnson and H. Farid. Exposing Digital Forgeries Through Chromatic Aberration. ACM Multimedia and Security Workshop, Geneva, Switzerland, 2006. http:\/\/www.cs.dartmouth.edu\/farid\/downloads\/publications\/acm06c.pdf<\/p>\n<p>9. Xunyu Pan, Xing Zhang, Siwei Lyu. Exposing Image Splicing with Inconsistent Local Noise Variances http:\/\/citeseerx.ist.psu.edu\/viewdoc\/download?doi=10.1.1.436.6840&amp;rep=rep1&amp;type=pdf<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"About_the_authors\"><\/span>About the authors:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Serge Petrov<\/p>\n<p>Interests: Digital Video Forensics, Forgery Detection, Audio Forensics<\/p>\n<p><a href=\"http:\/\/linkedin.com\/in\/igormikhaylovcf\" target=\"_blank\" rel=\"noopener\">Igor Mikhaylov<\/a><\/p>\n<p>Interests: Computer, Cell Phone &amp; Chip-Off Forensics<\/p>\n<p><a href=\"https:\/\/www.linkedin.com\/in\/oleg-skulkin-96652a87\" target=\"_blank\" rel=\"noopener\">Oleg Skulkin<\/a><\/p>\n<p>Interests: iOS forensics, Android forensics, Mac OS X forensics, Windows forensics, Linux forensics<\/p>\n","protected":false},"excerpt":{"rendered":"Digital images and videos have become an essential part of our lives for a long time already. This&hellip;","protected":false},"author":126,"featured_media":1436,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"csco_display_header_overlay":false,"csco_singular_sidebar":"","csco_page_header_type":"","footnotes":""},"categories":[6],"tags":[],"class_list":{"0":"post-1435","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-software","8":"cs-entry"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.6 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Methods of Digital Image Forgery Detection<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.digitalforensics.com\/blog\/software\/methods-of-digital-image-forgery-detection\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Methods of Digital Image Forgery Detection\" \/>\n<meta property=\"og:description\" content=\"Digital images and videos have become an essential part of our lives for a long time already. This&hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.digitalforensics.com\/blog\/software\/methods-of-digital-image-forgery-detection\/\" \/>\n<meta property=\"og:site_name\" content=\"Resources for Sextortion and Online Blackmail Victims\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/DigitalForensicsCorp\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-09-14T17:06:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-12-11T19:00:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.digitalforensics.com\/blog\/wp-content\/uploads\/2016\/09\/digital_image_forgery_detection.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"951\" \/>\n\t<meta property=\"og:image:height\" content=\"564\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Viktor Sobiecki\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta 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Sobiecki","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.digitalforensics.com\/blog\/wp-content\/uploads\/2025\/07\/viktor-sobiecki_avatar-96x96.jpg","url":"https:\/\/www.digitalforensics.com\/blog\/wp-content\/uploads\/2025\/07\/viktor-sobiecki_avatar-96x96.jpg","contentUrl":"https:\/\/www.digitalforensics.com\/blog\/wp-content\/uploads\/2025\/07\/viktor-sobiecki_avatar-96x96.jpg","caption":"Viktor Sobiecki"},"description":"Dr. Viktor Sobiecki currently serves as the Chief Technology Officer (CTO) at Digital Forensics Corporation, where responsibilities span the leadership of advanced cybersecurity initiatives, data breach incident responses, and corporate strategic planning. Professional career has been driven by the intersection of innovation and practical application, particularly in the domains of cybersecurity and cyber crime investigations. He holds a Ph.D. in Computer Science and has contributed extensively to academic and industry advancements through publications, patents, and technological solutions addressing complex real-world challenges. As a professional with over 25 years of experience in the fields of cybersecurity, artificial intelligence, and digital forensics his career spans roles in academic research, software development, corporate leadership, and expert consulting, giving me a comprehensive understanding of the technical, strategic, and practical dimensions of projects. Expertise spans a wide range of technical domains, including: \u2022 Data Breach Incident Response: Managing immediate responses to cybersecurity crises, including the containment and mitigation of threats \u2022 Corporate Strategy Development: Designing long-term strategies to enhance organizational resilience against emerging cyber threats. \u2022 Expert Testimony: Providing legal and technical expertise in high-profile cybersecurity cases. \u2022 Artificial Intelligence and Machine Learning: Designing and implementing algorithms for data analysis, pattern recognition, and anomaly detection. \u2022 Network Security and Data Integrity: Developing solutions to protect critical systems from cyber threats, including encryption protocols and intrusion detection systems. \u2022 Cloud Computing and Hybrid Infrastructures: Creating scalable, resilient architectures for data storage, processing, and security.","sameAs":["https:\/\/www.digitalforensics.com\/","https:\/\/www.linkedin.com\/in\/viktor-sobiecki\/"],"honorificPrefix":"Dr","jobTitle":"Chief Technology Officer (CTO)","worksFor":"Digital Forensics Corporation","url":"https:\/\/www.digitalforensics.com\/blog\/author\/visor\/"}]}},"_links":{"self":[{"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/posts\/1435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/users\/126"}],"replies":[{"embeddable":true,"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/comments?post=1435"}],"version-history":[{"count":2,"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/posts\/1435\/revisions"}],"predecessor-version":[{"id":14474,"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/posts\/1435\/revisions\/14474"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/media\/1436"}],"wp:attachment":[{"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/media?parent=1435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/categories?post=1435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.digitalforensics.com\/blog\/wp-json\/wp\/v2\/tags?post=1435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}