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Sometimes a watermark in stamp paper can be seen just by looking at the unprinted back side of a stamp. More often, the collector must use a few basic items to get a good look at the watermark. For example, watermark fluid may be applied to the back of a stamp to temporarily reveal the watermark. [4]
Often used by a watermark designer is the evaluation of single properties to show, for example, an improvement. Mostly, end-users are not interested in detailed information. They want to know if a given digital watermarking algorithm may be used for their application scenario, and if so, which parameter sets seems to be the best.
Captions should be removed as losslessly as possible. Cropping is generally best and most efficient when the caption is located at the top or bottom of a picture, but in some cases cloning is necessary to maintain parts of the image. This should still not be done unless the text is within the image itself and not located on a border or along an ...
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 ...
Watermarks present an issue when archival videos are used for a documentary that strives to create a coherent story. In some cases, watermarks are blurred or digitally removed if possible to clean up the picture. In the absence of visually perceptible watermarks content control can be ensured with visually imperceptible digital watermarks. [2]
Because of the risk that placeholder material might accidentally be published, it is clearly marked with an FPO indicator in the form of a simulated watermark or overprint, stamp, or the like in the expectation that it will make the placeholder's presence obvious to designers working on the layout; reviewing proof copies; or, as a last resort ...
Chiaroscuro watermark. The artist Bill Fink is holding up the self portrait to light with the watermarked paper held in his hand. A light-and-shade watermark, [note 1] is a watermark image produced in a chiaroscuro style. In a traditional watermark, an image is produced in paper fibers by contrasting shades of light and dark in places where the ...
Within reason, crop an image to remove irrelevant areas. But do not "throw away information"; for example, if a photograph shows George Washington and Abraham Lincoln together at a birthday party, and the article you're working on requires only Lincoln, consider uploading both the original image and the crop of Lincoln. Also, if an image has ...