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The Crown CA watermark found on many British Commonwealth stamps (seen from the reverse) A US postal stationery envelope from 1883 showing a clear watermark on laid paper In philately , the watermark is a key feature of a stamp, and often constitutes the difference between a common and a rare stamp.
Darktable (stylized as darktable) is a free and open-source photography application and raw developer. Rather than being a raster graphics editor like Adobe Photoshop or GIMP, it comprises a subset of image editing operations specifically aimed at non-destructive raw image post-production.
The user can also rename multiple images, remove scratches, create panorama pictures (stitch), convert RAW photos (from Canon, Nikon, Olympus, etc. cameras), send images via Skype, send photo SMS, burn digital watermarks, correct colors, run a screen show, convert and correct JPEG images in a batch process, rename fields, open pictures and ...
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 ...
The usage of visible watermarks is discouraged. If a non-watermarked version of the image is available, please upload it under the same file name and then remove this template . Ensure that removed information is present in the image description page and replace this template with {{Metadata from image}} or {{Attribution metadata from licensed ...
A digital watermark is called semi-fragile if it resists benign transformations, but fails detection after malignant transformations. Semi-fragile watermarks commonly are used to detect malignant transformations. A digital watermark is called robust if it resists a designated class of transformations. Robust watermarks may be used in copy ...