They are also used to identify the owner (or copyright controller/or the document).Static watermarks may also be used so that when a document is copied, a previously ‘hidden’ watermark is revealed which shows that the copied document is not an original.The principle is to ‘scan’ the images or sounds and recognize the pattern, thus ‘prove’ the ownership of the original so that the owner can prosecute those found making or storing illegal copies.
They are also used to identify the owner (or copyright controller/or the document).Static watermarks may also be used so that when a document is copied, a previously ‘hidden’ watermark is revealed which shows that the copied document is not an original.The principle is to ‘scan’ the images or sounds and recognize the pattern, thus ‘prove’ the ownership of the original so that the owner can prosecute those found making or storing illegal copies.Tags: National Homeworkers AssociationEssay On Rationalism ReligionCivil Engineering Dissertation ProposalDbms Master ThesisBook Report For Fourth GradeTheaching Theory EssayUsing Logic To Solve A ProblemEssays On Deporting ImmigrantsBenefits Of Balanced Diet EssaysA Worn Path Essay
With the advent of digital works (pictures, music, film and so on) digital watermarks have also been developed, however they are not always used in quite the same way as watermarks in documents.
This is because, at least for the moment, it seems impractical to try and prevent people from making copies of computerised files, as computers will readily make perfect copies of the files they hold – something essential for backup and recovery.
The intention is either that in the event the images are copied then the ownership is not in dispute, or to prevent any realistic commercial use of the images if they are copied because their quality would not be acceptable. These digital watermarks are created by embedding extra information, commonly in the form of digital patterns, into the computer files containing the images or sounds to be protected. The second is to make it much more difficult for someone to remove the pattern because they do not know what they are looking for.
For this to be successful, the addition of the image to the information in the file must have no noticeable effect as far as the person seeing the subsequent picture or hearing the sound. In this case, the owner is using the watermark to help identify the source of the copy, since they cannot prevent the copying.
The first type of digital watermarks you will see are those which are visible or obvious, and are intended to be so.
These are usually images that are superimposed upon a still picture or a moving picture.So to help identify what is meant by watermarking please read the following sections that describe the commonest meanings in more detail, and then go on to describe which watermark methods are supported by Locklizard and how they may be implemented.Most people are familiar with two types of document watermarks which can be found in banknotes or on checks.There are also are a number of specialized printing techniques that make it possible to have printed watermarks that will vanish or appear if a protected document is photocopied or scanned.However, these rely upon high quality printing processes if they are to be successfully created.Watermarks are often used commercially to identify the manufacturer or the grade of paper.They have also been used to detect and prevent counterfeiting and forgery.Our editors will review what you’ve submitted and determine whether to revise the article.Join Britannica's Publishing Partner Program and our community of experts to gain a global audience for your work!However, it is not a very useful method if you are trying to protect information such as text or similar.This is because to hide these kinds of watermarks in a file you need to be able to alter lots of bits without anyone being able to notice.