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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 ...
RFID is synonymous with track-and-trace solutions, and has a critical role to play in supply chains. RFID is a code-carrying technology, and can be used in place of a barcode to enable non-line of sight-reading. Deployment of RFID was earlier inhibited by cost limitations but the usage is now increasing.
An example of tri-color marking on a heap with 8 objects. White, grey, and black objects are represented by light-grey, yellow, and blue, respectively. Because of these performance problems, most modern tracing garbage collectors implement some variant of the tri-color marking abstraction , but simple collectors (such as the mark-and-sweep ...
The Ishihara test is a color vision test for detection of red–green color deficiencies. It was named after its designer, Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917. [2] The test consists of a number of Ishihara plates, which are a type of pseudoisochromatic plate.
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When the number of colors is set to two, the user may be asked to make threshold and contrast settings. [8] A contrast setting looks for significant changes in pixel color rather than a particular color; consequently, it may ignore the gradual color variations in a gradient fill. Once the outline has been extracted, the user can manually ...
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