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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. Such a bitmap is used by a later stage of the printing system to produce the printed 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.

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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120 news items

TechVorm (blog)

TechVorm (blog)
Fri, 15 Jan 2016 04:05:02 -0800

Optimized for the HP Latex 310 and 330 Printers, the easy-to-use SAi FlexiPRINT HP Basic Edition Raster Image Processor (RIP)software is bundled with these printers. HP Latex 330 Printer – The 64-inch HP Latex 330 Printer combines application ...
Wide Format Online
Fri, 15 Jan 2016 14:18:45 -0800

Each device is covered by a two-year warranty as standard, and includes an Onyx RIP (raster image processor) well as cross-compatibility with other RIPs as well. Martin Johns, Product Manager for Epson UK, commented: “We listened to our customers' ...
MyPrintResource.com (press release)
Fri, 09 Oct 2015 09:26:00 -0700

This device offers an optional EFI XF server or Harlequin raster image processor (RIP) for advanced color and job management. The C931e provides a variety of on-demand solutions to bring printing in-house and help wholesalers lower operating costs.
What They Think
Wed, 11 Nov 2015 05:18:45 -0800

ColorGATE uses the current Adobe PDF Print Engine 4.0 as its Raster Image Processor engine (RIP engine) and has optimized it even further for the high-powered processing of extensive multiple-page documents in Productionserver, whereby data volumes ...

Advertising Specialty Institute (press release)

Advertising Specialty Institute (press release)
Thu, 09 Jul 2015 09:08:50 -0700

Raster Image Processor (RIP) Software: To keep your images from pixelating, you need a program that will rasterize them. Some manufacturers include RIP software in their product bundle, but there are third-party solutions available if that's not the case.
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 ...

What They Think

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 ...
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 ...

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