{"id":198508,"date":"2025-03-10T06:12:34","date_gmt":"2025-03-10T06:12:34","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=198508"},"modified":"2025-03-10T06:12:37","modified_gmt":"2025-03-10T06:12:37","slug":"what-methods-are-used-for-digital-watermarking","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/10\/what-methods-are-used-for-digital-watermarking\/","title":{"rendered":"What methods are used for digital watermarking"},"content":{"rendered":"\n<p>What methods are used for digital watermarking? (Choose all that apply.)<\/p>\n\n\n\n<p>a. Implanted subroutines that link to a central Web server automatically when the watermarked file is accessed<\/p>\n\n\n\n<p>b. Invisible modification of the LSBs in the file<\/p>\n\n\n\n<p>c. Layering visible symbols on top of the image<\/p>\n\n\n\n<p>d. Using a hex editor to alter the image data<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Correct Answers:<\/h3>\n\n\n\n<p><strong>b. Invisible modification of the LSBs in the file<\/strong><br><strong>c. Layering visible symbols on top of the image<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>Digital watermarking is a technique used to embed hidden or visible information within a digital file (such as an image, video, or audio) to protect copyright, authenticate ownership, or detect tampering. The two commonly used methods for digital watermarking include:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Least Significant Bit (LSB) Modification (Invisible Watermarking) &#8211; Option B<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>This method modifies the least significant bits (LSBs) of the pixel values in an image.<\/li>\n\n\n\n<li>Since human vision is not sensitive to minor color changes in individual pixels, altering these bits does not visibly affect the image.<\/li>\n\n\n\n<li>This watermarking technique is widely used because it ensures that the watermark remains hidden but can still be detected using special extraction methods.<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Layering Visible Symbols on the Image (Visible Watermarking) &#8211; Option C<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>This involves adding a visible watermark, such as a logo, text, or symbol, over the image to indicate ownership.<\/li>\n\n\n\n<li>It is commonly seen in stock photos, where the watermark ensures unauthorized usage is discouraged.<\/li>\n\n\n\n<li>While effective for protection, visible watermarking can sometimes be removed through editing.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Incorrect Answers:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Option A (Implanted subroutines linking to a Web server)<\/strong><\/li>\n\n\n\n<li>This does not qualify as digital watermarking. Instead, it describes a tracking mechanism rather than an embedding method.<\/li>\n\n\n\n<li><strong>Option D (Using a hex editor to alter image data)<\/strong><\/li>\n\n\n\n<li>A hex editor can be used for modifying data, but it is not a watermarking method. Watermarking techniques follow systematic and reversible patterns for detection and verification.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/03\/image-708.png\" alt=\"\" class=\"wp-image-198509\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What methods are used for digital watermarking? (Choose all that apply.) a. Implanted subroutines that link to a central Web server automatically when the watermarked file is accessed b. Invisible modification of the LSBs in the file c. Layering visible symbols on top of the image d. Using a hex editor to alter the image [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-198508","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/198508","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=198508"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/198508\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=198508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=198508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=198508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}