Raster Design

• The week started with Computer Aided Design. For designing in 2D Raster, I had used GIMP. Raster image is a dot matrix data structure which represents rectangular grid of pixels. A raster is technically characterized by the width and height of the image in pixels and by the number of bits per pixel. Through the GIMP software we can convert a raster image in a vector image. I had played and tried it using an image available on internet. The image I converted from RAster to vector is shown below:-

 

Further, I tried my hands on imager manupulation using GIMP. I found that, it easy toedit any distorted image to make it usable once your are comfortable using GIMP. I played with GIMP editing an image and the difference found after the editing can be seen as under:-

 

Image Enhancement:-

Vector Design:-

Vector graphics are computer graphics images that are defined in terms of 2D points, which are connected by lines and curves to form polygons and other shapes. Each of these points has a definite position on the x- and y-axis of the work plane and determines the direction of the path; further, each path may have various properties including values for stroke color, shape, curve, thickness, and fill.

I started with exploring vector designs on inkscape and the software has certain features in its tool bar which can be explored by then user. The user can create his own design using the features available on Inkscape. I had designed a Penguin using Inkscape. It some what looks like a Penguin but not exactly the same. The image I drew was as under:-

 

3D Design-

• For creating and playing with the vector design, I found FREECAD a bit easier to work with. There are several tutorials available over web for the freecad and other designing softwares which are very helpful. For the beginners there are many videos available which can be referred during the course of exploring the softwares to work on. Initially, it was difficult to get used to working on FREE CAD but slowly and steadly I some how found a way and started with normal designs and ways to make some 3 d images with 2 different shapes and tried boolean algebra with it. The structures I chose were a cude and cylinder and then I tried placing them in different position as explained in the image below:

 

Further to do more with the FREECAD, I explored to draw an object using parameters and extude it as well. The design I created was as under:-

The image I created was parametric in nature i.e. the changes in the spereadsheet changes the dimensions of the 3D image. I also had an hands-on in sketcher tool of FREECAD