Output: The raster produced by the rendering process is sent to the marking engine in the output device, whether it’s exposing a plate, a drum for marking with toner, an inkjet head or any other technology. The term ‘rendering’ is sometimes used specifically for this part of the overall processing, and sometimes to describe the whole of the RIPing process.
Rendering: The display list is processed to convert every graphical element into the appropriate pattern of pixels to form the output raster.
Raster graphic pdf#
This phase is only required for any graphics in formats that support live transparency, such as PDF it’s not required for PostScript language jobs or for TIFF and JPEG images because those cannot include live transparency. This database is referred to as a display list.Ĭompositing: The display list is pre-processed to apply any live transparency that may be in the job. Each may be an image, a character of text (including font, size, color etc), a fill or stroke etc. Interpreting: The file to be RIPped is read and decoded into an internal database of graphical elements that must be placed on the output. Even image file formats such as TIFF, JPEG or PNG usually need to be RIPped, to convert them into the correct color space, at the right resolution and with the right halftone screening for the press. The process of RIPping a job requires several steps to be performed in order, regardless of the page description language (such as PDF) that it’s submitted in. The RIP converts text and image data from many file formats including PDF, TIFF™ or JPEG into a format that a printing device such as an inkjet printhead, toner marking engine or laser platesetter can understand. A popular program is Adobe Photoshop.Ever wondered what a raster image processor or RIP does? And what does RIPping a file mean? Read on to learn more about the phases of a RIP, the engine at the heart of your Digital Front End (DFE). Most users use a paint program or image editor to create and edit raster images. What program can create a raster image?Īny program capable of opening one of the image formats mentioned above can also create a raster image. Vector images are used for logos, graphics, and text because they can be resized in any direction without distortion. For example, increasing the size of a small raster image distorts the image because the image editor is resizing each pixel in the image.īecause of this disadvantage, many printing companies that print business cards, posters, or any other large printing require the image to be a vector image. One of the biggest disadvantages of a raster image is the inability to resize the image without getting jaggies or other types of distortion.
Today, almost all of the images you see on the Internet and images taken by a digital camera are raster images. The number defines the location, size, or color of the pixels. A raster image is an image file format that's defined by a pixel with one or more numbers associated with it. Raster may refer to any of the following:ġ.
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