Ads
related to: remove background without watermark pdffotor.com has been visited by 10K+ users in the past month
pdfsimpli.com has been visited by 1M+ users in the past month
Search results
Results from the 24/7 Vacations Content Network
Watermark. A watermark is an identifying image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, atop a dark background), caused by thickness or density variations in the paper. [ 1] Watermarks have been used on postage stamps, currency, and other ...
In such a case, the technique of hiding the message (here, the watermark) must be robust to prevent tampering. However, digital watermarking sometimes requires a brittle watermark, which can be modified easily, to check whether the image has been tampered with. That is the key difference between steganography and digital watermarking.
Transparency (graphic) GIF animation of an Apollonian sphere packing with transparent background. Transparency in computer graphics is possible in a number of file formats. The term "transparency" is used in various ways by different people, but at its simplest there is "full transparency" i.e. something that is completely invisible.
Security printing. Security printing is the field of the printing industry that deals with the printing of items such as banknotes, cheques, passports, tamper-evident labels, security tapes, product authentication, stock certificates, postage stamps and identity cards. The main goal of security printing is to prevent forgery, tampering, or ...
Printer tracking dots. Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code ( MIC ), is a digital watermark which many color laser printers and copiers produce on every printed page that identifies the specific device that was used to print the document.
In security printing, void pantographrefers to a method of making copy-evidentand tamper-resistantpatterns in the background of a document. Normally these are invisible to the eye, but become obvious when the document is photocopied. Typically they spell out "void", "copy", "invalid" or some other indicator message.
Ads
related to: remove background without watermark pdffotor.com has been visited by 10K+ users in the past month
pdfsimpli.com has been visited by 1M+ users in the past month