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Generating the raster image data

A raster image processor (RIP) is a component used in a printing system which produces a raster image also known as a bitmap. The bitmap is then sent to a printing device for output. The input may be a page description in a high-level page description language such as PostScript, Portable Document Format, XPS or another bitmap of higher or lower resolution than the output device. In the latter case, the RIP applies either smoothing or interpolation algorithms to the input bitmap to generate the output bitmap.

Raster image processing is the process and the means of turning vector digital information such as a PostScript file into a high-resolution raster image.

Originally RIPs were a rack of electronic hardware which received the page description via some interface (e.g. RS-232) and generated a "hardware bitmap output" which was used to enable or disable each pixel on a real-time output device such as an optical film recorder.

A RIP can be implemented either as a software component of an operating system or as a firmware program executed on a microprocessor inside a printer, though for high-end typesetting, standalone hardware RIPs are sometimes used. Ghostscript and GhostPCL are examples of software RIPs. Every PostScript printer contains a RIP in its firmware.

Earlier RIPs retained backward compatibility with photosetters so they supported the older languages. So, for example Linotype RIPs supported CORA (RIP30).

Stages of RIP[edit]

  1. Interpretation: This is the stage where the supported PDLs (Page description languages) are translated into a private internal representation of each page. Most RIPs process pages serially so the current machine state is only for the current page; i.e. one page at once. Once a page has been output the page state is discarded to ready it for the next page.
  2. Rendering: A process through which the private internal representation is turned into a continuous tone bitmap. Note that in practical RIPs, interpretation and rendering are frequently done together. Simple languages were designed to work on minimal hardware so tend to "directly drive" the renderer.
  3. Screening: In order to print, a continuous-tone bitmap is converted into a halftone (pattern of dots). Two screening methods or types are Amplitude Modulation (AM) screening and stochastic or Frequency Modulation (FM) screening. In AM screening, dot size varies depending on object density—tonal values; dots are placed in a fixed grid. In FM screening, dot size remains constant and dots are placed in random order to create darker or lighter areas of the image; dot placement is precisely controlled by sophisticated mathematical algorithms.

A RIP chip is used in laser printers to communicate raster images to a laser.

RIP Providers[edit]

See also[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Raster_image_processor — Please support Wikipedia.
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58 news items

Printing Impressions (press release)
Fri, 13 Feb 2015 08:56:08 -0800

MOUNT LAUREL, NJ—February 13, 2015—OKI Data Americas announces availability of the new C931e and C941e, upgrading its Multimedia Production Platform family of production-quality A3 color devices. These new, full-color devices deliver enhanced ...
Yahoo Finance UK
Thu, 12 Feb 2015 11:52:30 -0800

MOUNT LAUREL, NJ--(Marketwired - February 12, 2015) - OKI Data Americas announces availability of the new C931e and C941e, upgrading its Multimedia Production Platform family of production-quality A3 color devices. These new, full-color devices ...
Printing Impressions (press release)
Fri, 26 Sep 2014 12:48:40 -0700

The C711DW utilizes OKI label management software from HYBRID Software as a front-end solution, plus Proactive server and Harlequin™ raster image processor (RIP). It prints at up to 25 ft./min. in continuous feed mode, and handles a variety of media ...
MyPrintResource.com (press release)
Tue, 17 Feb 2015 15:40:26 -0800

C931e and C941e– These new, full-color devices deliver enhanced feature sets, speed, and superior output quality. Optional EFI XF server or Harlequin raster image processor (RIP) for advanced color and job management. The unique five color printing ...

Business 2 Community

Business 2 Community
Tue, 14 Oct 2014 18:41:15 -0700

Color management brings predictability to the studio, eliminates guesswork during retouch operations, increases the productivity and efficiency in the studio and is a key tool in the print ad production process. But for a studio or production house ...
Tue, 19 Nov 2013 15:55:31 -0800

For a time an interpreter (sometimes referred to as a RIP for Raster Image Processor) for the PostScript language was a common component of laser printers, into the 1990s. lloyd1981 5pts. @Kungpaoshizi @Shiyen. You mean you are talking about the ...
What They Think
Mon, 01 Apr 2013 21:55:52 -0700

In the past, this has been a RIP (Raster Image Processor) kernel which interpreted the file and then wrote the bitmap for imaging. In recent times we are seeing PDF libraries that perform a similar function, which is interpreting/processing the ...
MyPrintResource.com (press release) (blog)
Fri, 25 Apr 2014 05:20:18 -0700

The Fiery EXP raster image processor (RIP) is one of three digital front end (DFE) choices for the Versant 2100. This hyper RIP from EFI features 40 percent more horsepower, making it even more robust for high production volumes and variable-data print ...

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