MATHCAD, Geomagic Freeform, Mecsoft VisualCAM & CAD CAM CNC software support discussion forum. Moderated.

Moderators: caddit, evanish, Moderators

#2120 by caddit
Fri Apr 04, 2014 3:02 pm

Short answer:
Raster images use dots in a grid to make a picture. Vector images use a list of geometric shapes.

Long answer:
Raster graphics use a 2-dimensional array grid array of "pixels", or dots. Each pixel carries its own information about color, hue, etc. A typical raster image can store compressed information about more than a million of these individual pixels, packed in a square or rectangular area. When seen from a distance, this grid of pixels appears to the human eye to present an image. Some formats like GIF even include a way to store multiple overlapping grids which, when shown sequentially, can produce a sprite or animation. There is no math data in raster graphics, only a collection of "dumb" pixels with color, which makes it an ideal format for photos etc.

Vector graphics use a predefined set of real math-based "entities", or shape objects, that define geometry such as circles, lines, splines, etc. Additional characteristics of each entity such as color and lineweight may also be included. Simple entities can be collected to represent complex ones, such as two circles and some line entities into a single 3D cylinder entity. This makes vector graphics ideal for CAD and CAM.

Recent Topics

User avatar Progecad on wine

by davecoventry

Thu Apr 30, 2020 6:49 am

User avatar progeCAD 2020 Update Released on CADDIT

by caddit

Mon Nov 25, 2019 2:57 pm

Default Avatar Closing loops in reference paths

by Ken Russ

Mon Nov 25, 2019 10:40 am

User avatar Restoring a .bak file

by caddit

Mon Nov 25, 2019 7:49 am

Default Avatar Progecad 2017 > Missing Poup menus

by BayDviBerg

Fri May 17, 2019 3:34 pm


About Us

Welcome to Ausstralia/New Zealand's CADDIT CAD software forum. CAD CAM Forum for support and discussion regarding AutoCAD, progeCAD IntelliCAD, Geomagic Freeform, Mathcad, CNC software.

This forum offers free support for progeCAD by qualified technical staff. Thank you for visiting.

The team