Printing

OCR to help generate search text in scan document

Digitizing a magazine article or a printed contract is often a common needs. We could either spend hours retyping and then correcting misprints or we could convert all the required materials into digital format in several minutes using a scanner and Optical Character Recognition (OCR) software. Although scanning pages would be an expensive and time-consuming undertaking, the benefits are huge.

IPP - Print via HTTP or HTTPS

The Internet Printing Protocol (IPP) is a standard network protocol for remote printing as well as managing print jobs, media size, resolution, and so forth in distributed environments.

The idea behind the IPP is to define a protocol for end users to print over the Internet, provide users with the same printing controls and concepts that they use to print locally or to LAN-attached printers. There are two main components to IPP:

lpd / lpr - Line Printer Daemon protocol / Line Printer Remote protocol

The Line Printer Daemon protocol / Line Printer Remote protocol (or LPD, LPR) is a platform-independent printing protocol that runs over TCP / IP to send print jobs to remote printers. The technology was originally developed for BSD UNIX and has since become the de facto cross-platform printing protocol. The LPD protocol specification is documented in RFC 1179.

LPD protocol uses TCP port 515. A request begins with a byte containing the request code, followed by the arguments to the request, and is terminated by an ASCII LF character.

Print anywhere, from any device through Google Cloud Print

Google Cloud Print is a new technology that connects printers to the web. It is built on the idea that printing can be more intuitive, accessible, and useful.

By using Google Cloud Print, home and work printers can be configure to be available to anyone chosen, from the applications use every day. Google Cloud Print works on phone, tablet, Chromebook, PC, and any other web-connected device to print from.

Laser Printer

A laser printer is a common type of computer printer that rapidly produces high quality text and graphics on plain paper.

RGB on-screen & CMYK to print

There are two main ways to mix color - RGB & CMYK. Their differences can sometimes make it difficult to get the colors in the final product to look the way we want.

When supplying digital files for full color printing, it is important for us to supply images and graphics in the CMYK mode in order to print properly. Many software programs give you the choice to work in either the RGB or CMYK mode.

Potential disadvantages in using PostScript

Some of the disadvantages related to PostScript printing are:

Can be slower at printing

Page Description Languages - PDL

Earlier on in history, printers viewed text as text, and graphics as graphics. A page was created from a combination of separate entities. The page images can be created by having raw text like, the word "Hello World", combined with Escape codes and possibly embedded graphic pictures. Different programs have different file formats.

Introduction to IEEE 2600.1

Hardcopy Devices (HCD) may contain or process valuable or sensitive assets that need to be protected from unauthorized disclosure and alteration. The utility of the device itself may be considered a valuable asset which also needs to be protected. There is also a need to ensure that the HCD cannot be misused in such a way that it causes harm to devices with which it shares network connections. Businesses today are increasingly aware of the need to protect the data stored on their office equipment.

Common Peripheral Controlling Architecture (CPCA)

CPCA is a Canon proprietary protocol and instruction set that is designed to support programming code for handling various peripheral devices (Printer, Scanner, Fax etc.) provided by Canon in a unified way as well as monitoring and reporting state errors.

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