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Digital watermarking is the process of hiding digital information in a carrier signal; the hidden information should, [2] but does not need to, contain a relation to the carrier signal. Digital watermarks may be used to verify the authenticity or integrity of the carrier signal or to show the identity of its owners.
If the data file to be retrieved is an image, the provider can embed a watermark for protection purposes. The process allows tolerance to some change, while still maintaining an association with the original image file. Researchers have also developed techniques that embed components of the image within the image.
Colour fringes that worsen the further the image point is from the optical axis. [7] [12] TIFF: Tag Image File Format. A high fidelity computer file format for handling digital images that does not sacrifice colour and form detail in the way that 'lossy' compression formats such as GIF, JPEG and PNG do. [8] TLR: Twin-lens reflex. A camera with ...
Download as PDF; Printable version; ... Help. Pages in category "Digital watermarking" The following 5 pages are in this category, out of 5 total. ... you agree to ...
Camera Image File Format; Camera module; List of cameras supporting a raw format; Channel (digital image) Chimping; Color filter array; Colour co-site sampling; CombineZ; Computational photography; Curve (tonality)
Another type of watermark is called the cylinder mould watermark. It is a shaded watermark first used in 1848 that incorporates tonal depth and creates a greyscale image. Instead of using a wire covering for the dandy roll, the shaded watermark is created by areas of relief on the roll's own surface.
Illustration workshop : For improvement of non-photographical images such as graphics, diagrams, etc. Photography workshop : For improvement of photography-related imagery including macro, digital, and monochrome photography. Map workshop : For improvement of maps and cartography.
Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) 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 photocopiers produce on every printed page that identifies the specific device that was ...