Computer Graphics – Concepts and Principles

Representing and manipulating an image of data is called Computer Graphics by a computer. There is briefly referred to as CG. The development in this area has made a drastic change in the media, such as animation and video game industry. The largest part of the mind blowing effects in the movie theater are the result of the advances in computer graphics. Here we discuss some of the basic concepts and principles of CG

Image :.

An image of the picture is nothing but a piece of art that looks like a person or a physical object. This representation of a physical object or person can be either two-dimensional or three-dimensional. Optical devices such as lenses, mirrors, cameras are used for such images. A digital image is a representation of a 2-dimensional image in binary format, i.e., as a sequence of 1s and 0s. Raster and vector graphics are the two types of digital images. But it smoothens

are the most widely used

Pixel :.

The resolution of a picture is often based on the pixel counts of the image. When the image is viewed in an enlarged section, you may notice that the individual pixels as squares. Generally pixels are arranged in a regular two-dimensional grid and dots or squares, are often used to represent them. Each pixel differs in intensity and color systems. A pixel can be considered as an example of an image. Increase the number of pixels, ie increase of samples, the results in the exact reproduction of the original photo

Graphics :.

combination of text, image and color is called Graphics. They are the visual representation of an object on the surface, such as the computer screen, wall, paper, etc. photos, drawings, maps, schematics are some of the examples. The main objective of the Graphics is a style that is unique or create an effective communication relating to cultural elements

Rendering :.

Using computer programs, an image can be generated from a model. This process is called Rendering. The model includes viewpoint, geometry, texture, lighting, etc. The image is an image of raster graphics or digital image. In order to produce the final video output, this process is used for the calculation of the effects in a video editing file

3D projection.

This type of projection is often used and most preferably in CG, drafting and engineering. It is a method of mapping three-dimensional points a 2-dimensional plane. At this time, only a 2-dimensional plane is used for displaying graphic data

Ray tracing.

With the aid of this technique, an image can be generated by tracing the path of the light beam by means of pixel in an image plane. It has the ability to produce images with extreme photorealism with greater computational cost

Shading :.

It refers to depicting illustrations of depth in 3D models in different darkness levels. There are different techniques of shade, where the perpendicular lines in a crisscross pattern shadow drawn a field

texture mapping.

This method is used to add texture, color or detail of a 3D model or a computer-generated graphics. A texture map can be assigned to the surface of a form, say polygon.

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