Imaging Software Glossary: Terms & Concepts: R
The imaging software glossary provides definitions for document and web imaging, in addition to terminology specific to Snowbound Software’s imaging technology.
| Raster | Raster describes a single row of pixel data for a digital image. Thus, a raster image is one that is made up of rows of pixels. A raster image is a data file or structure representing a generally rectangular grid of pixels, or points of color. The color of each pixel is individually defined. For example RGB images consist of colored pixels defined by three bytes—one byte each for red, green, and blue. Less colorful images require less information per pixel; an image with only black and white pixels requires only a single bit for each pixel. Raster images differ from vector images in that vector represents an image through the use of geometric objects such as curves and polygons. |
| Redraw | Redrawing re-displays the current image. |
| Render | Render means to draw the image into a device context, such as a printer or monitor. It generates an image from a model, a description of three dimensional objects in a strictly defined language or data structure. It contains geometry, viewpoint, texture, and lighting information. |
| Resize | Resizing changes the X and Y size of the actual image data to the coordinates given. |
| Resolution | Resolution is the number of pixels per unit of length along the x and y axis. It designates the sharpness and clarity of an image. The term is most often used to describe monitors, printers, and bit-mapped graphic images. |
| Rotate | Rotating changes the image angle. An image may need to be rotated because a document may have gone through a scanner at an angle. This process permanently changes the image. Sometimes image data is scanned or photographed upside down. Rotating the image 180 degrees corrects this problem. |
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