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A digital CDP (100x100 pixel binary image) is printed at 600 pixels per inch (ppi) on a Canon C6045 laser printer. The original CDP real image size is 4.2mm x 4.2mm. This original CDP was scanned at 2400 ppi with a CanoScan 9000F flatbed scanner. The scan was processed with GIMP for image restoration, then printed on the same Canon C6045 laser ...
Reverse automatic document feeder A scanner with a duplexing automatic document feeder A Konica Minolta photocopier with an automatic document feeder in use. In multifunction or all-in-one printers, fax machines, photocopiers and scanners, an automatic document feeder or ADF is a feature which takes several pages and feeds the paper one page at a time into a scanner or copier, [1] allowing the ...
Nowadays, the most common use of spooling is printing: documents formatted for printing are stored in a queue at the speed of the computer, then retrieved and printed at the speed of the printer. Multiple processes can write documents to the spool without waiting, and can then perform other tasks, while the "spooler" process operates the printer.
Duplex scanning document scanner (Fujitsu fi-5110C) Duplex scanning is usually implemented on multifunction printers using a Reversing Automatic Document Feeder (RADF), which removes, reverses, and re-feeds the document after scanning one side. Duplex scanning is achieved on scanners by either RADF or by single pass duplex scanning using two ...
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 used to print the document.
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A sheetfed scanner, which moves the page across an image sensor using a series of rollers, may be used to scan one page of a document at a time or multiple pages, as in an automatic document feeder. A handheld scanner is a portable version of an image scanner that can be used on any flat surface.